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Mat 143 Statistics

Total questions: 166

Worksheet time: 8hrs 57mins

Name
Class
Date
1.
What is the mode?
a)
# happening the most
b)
the average
c)
biggest - smallest
d)
the middle #
2.

What is the range?

a)

smallest-biggest

b)

highest score - lowest score

c)

the middle #

d)

# happening the most

3.
What does "mean" mean?
a)
average
b)
middle
c)
repeats the most
d)
variation
4.
What does "mode" mean?
a)
average
b)
middle
c)
repeats the most
d)
variation
5.
A data set can have more than one mode
a)
True
b)
False
6.
A data set can have more than one median?
a)
True
b)
False
7.

To find the average or mean of a set of numbers, add up all the items and divide by...

a)

2

b)

The minimum

c)

The maximum

d)

The number of scores

8.

What is the mean of this set of data?

2, 15, 7

a)

24

b)

3

c)

6

d)

8

9.
Find the range.
5, 15, 10, 20, 15, 10, 15
a)
5
b)
10
c)
15
d)
13
10.
At Donald's Donuts the number of donut holes in a bag can vary. Help Donald find the mode.
12,10,10,10,13,12,11,13,10
a)
13
b)
12
c)
11
d)
10
11.

Dr. Dre is a dentist. He needs to report on the average number of cavities that his patients have. In one day he records the following number of cavities: 1,0,1,5,6,3,4.

What should he report?

a)

3.33

b)

2.85

c)

3

d)

3.5

12.
Find the median of these numbers:
2, 3, 4, 5, 5, 7
a)
4
b)
5
c)
4.5
d)
6
13.
If you score 76, 85, 97, and 83 on your math tests, what would your median score be? 
a)
84
b)
90
c)
85
d)
88
14.
The number of pages that Carolyn wrote in her journal each day from Monday to Friday is shown below: 
9, 8, 12, 6, 10
What is the mean number of pages she wrote per day?
a)
5
b)
6
c)
9
d)
11
15.

Find the median, mode and range:

3, 5, 7, 9, 11, 8, 3

a)

median:7 mode:9 range:8

b)

median:6 mode:3 range:7

c)

median:7 mode:3 range:8

16.
The mode score on the 6th grade math test was 94! Which of these interpretations must be correct?
a)
94 was the highest score on the test.
b)
More students received a 94 than any other score
c)
No student scored below a 94
d)
A score of 91 was slightly below average.
17.

33, 25, 42, 25, 31, 37, 46, 29, 38

What is the upper (/3rd) quartile of the data?

a)

37

b)

38

c)

40

d)

46

18.

33, 25, 42, 25, 31, 37, 46, 29, 38

What is the lower (1st) quartile of the data?

a)

25

b)

27

c)

29

d)

33

19.

33, 25, 42, 25, 31, 37, 46, 29, 38

What is the interquartile range (IQR) of the data?

a)

8

b)

9

c)

13

d)

21

20.

33, 25, 42, 25, 31, 37, 46, 29, 38

What is the interquartile range (IQR) of the data?

a)

8

b)

9

c)

13

d)

21

21.

How many data points are greater than 34?

a)

10

b)

11

c)

12

d)

13

22.

Calculate the 5 number summary for the following data. You may use your graphing calculator.

a)

1791, 3162, 6163, 8578, 9400

b)

1791, 3815, 6472, 8924.5, 9400

c)

6197.44

d)

7609

23.

Find the Inter-Quartile Range (IQR). You may use your graphing calculator.

a)

7609

b)

8924.5

c)

2708

d)

5416

24.

Owen was asked to write down the number of pull-ups that 7 of his classmates could do. He wrote down: 3, 2, high, low, 6, 1, 8. Owen said that "high" was greater than 6 and "low" was less than 2. Find the median.

a)

2

b)

3

c)

2.5

d)

Cannot be determined.

25.

On a recent test, one class of 26 students had a mean score of 78%, while another class of 32 students had a mean score of 86%. What is the overall mean of the two classes combined?

a)

82

b)

82.4

c)

81

d)

83

26.

Find the mode:

3.8, 4.2, 4.0, 4.2, 4.2

a)

4.2

b)

3.8

c)

4.0

d)

4

27.
What is the interquartile range (IQR)?
a)
4
b)
64
c)
60
d)
8
28.
What value is the lower quartile?
a)
66
b)
58
c)
60
d)
64
29.
What is the median?
a)
62
b)
58
c)
66
d)
60
30.
What is the range of the data shown?
a)
85
b)
90
c)
80
d)
70
31.

Marco bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is the range of Marco's scores?

a)

193

b)

127

c)

60

d)

66

32.
Which interval has the highest frequency?
a)
9 - 10 books
b)
7-8 Books
c)
5-6 Books
d)
3-4 Books
33.

What test score is the mode of Mary's data?

a)

49

b)

55

c)

85

d)

73

34.
How many total students are in the science class?
a)
13
b)
6
c)
27
d)
25
35.

Describe the shape of the graph.

a)

Skewed right

b)

Skewed left

c)

Random

d)

Symmetrical

36.
A survey should always be ____ and ____.
a)
random and biased
b)
random and unbiased
37.

At an assembly 7 out of 10 students who entered the gym were carrying a backpack. Based on this information, if 700 students were at the assembly, how many students could be expected to be carrying a backpack?

a)

49

b)

490

c)

210

d)

421

38.
Ana wants to know the average student’s opinion of the tardy policy at her school. Which group of students should she survey in order to achieve the most accurate results?
a)
thirty students who are often tardy
b)
thirty students who are rarely tardy
c)
thirty of her friends
d)
thirty randomly selected students from her school
39.

A public library asked every 10th person who entered to name the type of book they were getting

a)

Biased

b)

Unbiased

40.
A sample should be
a)
representative of  only middle school students only
b)
a very large group
c)
representative of the population
d)
representative of people who volunteer
41.

The Student Council asked every tenth student in the lunch line how they preferred to be contacted with school news. The results are shown in the table. Is this an unbiased sample? If yes, suppose there are 684 students at the school. How many can be expected to prefer E-mail?

a)

No, it's a biased sample

b)

432

c)

304

d)

16

42.

A hospital wants to open a gym. They ask the night-shift ER staff when they would use the gym.

a)

Biased

b)

Unbiased

43.

A radio station asks its listeners to dial one of two numbers to indicate their preference for one of two candidates in an upcoming election. Of the responses received, 76% favored candidate A. If there are 1,500 registered voters, how many will vote for candidate A?

a)

1,140

b)

6

c)

1,974

d)

100

44.

To determine the number of umbrellas the average household in the United States owns, a survey of 100 randomly selected households in Arizona is conducted. Of the households, 24 said that they own 3 or more umbrellas. The researcher concluded that 24% of the households in the United States own 3 or more umbrellas. Is the this a valid conclusion? Justify your answer.

a)

Valid. The sample is biased.

b)

Not valid. The sample is biased.

c)

Valid. The sample is unbiased.

d)

Not valid. The sample is unbiased.

45.

A company makes DVDs and randomly selects 25 from 1500 to test them to see if they work.

a)

Biased

b)

Unbiased

46.

Which measure of central tendency would best represent this data?

a)

Mean

b)

Median

c)

Mode

d)

Range

47.

Which measure of central tendency best represents this data?

a)

Mean

b)

Median

c)

Mode

d)

Range

48.

The mean of this data set is 17.8. What would happen to the mean if 40 was added to the data set?

a)

The mean would not change

b)

The mean would go up

c)

The mean would go down

49.

What is the first step when creating a box and whisker plot?

a)

Find the median

b)

Find the lowest and highest values

c)

Order the data set

d)

Find the median of the top and bottom halves

50.

Which class has the higher median?

a)

1st period

b)

2nd period

c)

They have the same median

51.

Which class did better on the test?

a)

1st period

b)

2nd period

c)

They both performed the same

52.

How is the data distributed in this histogram?

a)

Symmetrically

b)

Skewed Right

c)

Skewed Left

53.

How is the data distributed in this histogram?

a)

Symmetrically

b)

Skewed Right

c)

Skewed Left

54.

What does the standard deviation tell us about the data set?

a)

How spread out the numbers are

b)

How much each number in the data set increases by

c)

How much each number in the data set decreases by

55.

What is normal distribution?

a)

A symmetrical bell-shaped graph

b)

A graph that is skewed to the right

c)

A graph that is skewed to the left

56.

What percent of data lies within 1 standard deviation from the mean?

a)

95%

b)

99%

c)

68%

d)

100%

57.
What was the day with the least amount of cars sold? 
a)
Monday
b)
Tuesday
c)
Wednesday
d)
Thursday
58.
How many cars were sold on Monday and Tuesday?
a)
13
b)
5
c)
11
d)
2
59.
What is the difference between the highest score and the lowest score on the test?
a)
15
b)
100
c)
6
d)
10
60.
How many people had 3 pets?
a)
5
b)
7
c)
4
d)
3
61.
Students at Cooper Elementary school took a survey about what kinds of pets they had at home. Then, students plotted that information on a frequency table.
How many kids have dogs and cats for pets?
a)
19
b)
12
c)
7
d)
20
62.
Roger bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is the range of Roger's scores?
a)
193
b)
127
c)
60
d)
66
63.
In order to find the median, the data must be sorted from least to greatest first.
a)
True
b)
False
64.
a)
A
b)
B
c)
C
d)
D
65.
a)
A
b)
B
c)
C
d)
D
66.
Which interval shows the greatest number of pets?
a)
15-19
b)
0-4
c)
5-9
d)
10-14
67.
In the last 5 games, Kevin Durant scored 22, 22, 18, 12, and 21 points. What is Durant's Mean (Average) score per game?
a)
 19 points per game
b)
95 points per game
c)
18.6 points per game
d)
22 points per game
68.

According to this article, what is STATISTICS?

a)

Statistics is the universal language of the sciences that involves information, numbers, visual graphics to summarize information and its interpretation. In other words, the science of collecting, describing, and interpreting data.

b)

Statistics is a method of analyzing and collecting data that is not easily visible and must be described by using mathematics and other sciences.

c)

Statistics is using data, concluding data and making inferential theories from the information that has a positive normal distribution.

d)

Statistics involves using information, numbers, and descriptive conclusions to help businesses make corrective business decisions based on the descriptive techniques that create perfect graphs.

69.

Descriptive statistics involves...

a)

collection, presentation, and description of sample data

b)

the technique of interpreting the values resulting from the descriptive techniques and making decisions and drawing conclusions about the population

c)

attempting to provide incorrect information and provide misleading graphs

d)

using information, numbers, and graphics even when data can't be collected

70.

Inferential statistics involves...

a)

collection, presentation, and description of sample data

b)

the technique of interpreting the values resulting from the descriptive techniques and making decisions and drawing conclusions about the population

c)

attempting to provide incorrect information and provide misleading graphs

d)

using information, numbers, and graphics even when data can't be collected

71.

Careful use of statistical methods does not include....

a)

carefully defining the situation

b)

gathering data

c)

summarizing the data accurately

d)

deriving and communicating meaningful conclusions

e)

throwing out data that does not fit the graph

72.

What is not a usual question to ask when conducting statistical analysis?

a)

If the data does not give me the results I want do I still trust the results?

b)

Where did the data come from, what is its source?

c)

What kind of surveys were conducted, if any?

d)

Are the results of the data reliable?

73.

Statistics are used...

a)

in education

b)

in science

c)

in government

d)

in mathematics

e)

all of the answer choices

74.

The POPULATION in statistics is best described by...

a)

a collection, or set, of individuals, objects, or events whose properties are to be analyzed

b)

the total number of people that live in a particular city

c)

the incomplete collection of individuals or objects that are of interest to the sample collector

d)

a collection of people that are being analyzed for membership on a list of particular elements to be studied

75.

A finite population is one that...

a)

can be physically listed

b)

the membership in the population is unlimited

c)

ends abruptly due to a catastrophy

d)

ends abruptly due to natural causes, such as a flood or the ice age

76.

An infinite population is one that...

a)

can be physically listed

b)

the membership in the population is unlimited

c)

ends abruptly due to artificial intervention, such as treating with an antibiotic

d)

ends abruptly due to natural causes, such as a flood or the ice age

77.

A sample is...

a)

a subset of a population

b)

an infinite selection of a population

c)

a characteristic of a population

d)

a data value generated by the statistical information

78.

A variable (or response variable) is

a)

a characteristic of interest about each individual element of a population or sample

b)

a characteristic that is irrelevant to the collection of the data

c)

a characteristic that changes when the data is collected

d)

a characteristic or trait that will be ignored in a sample population

79.

An experiment is...

a)

a planned activity whose results yield a set of data

b)

a numerical value that summarizes all of the data of an entire population

c)

the set of values collected from the variable from each of the elements that belong to the sample

d)

A numerical value summarizing the sample data

80.

A parameter is...

a)

a planned activity whose results yield a set of data

b)

a numerical value that summarizes all of the data of an entire population

c)

the set of values collected from the variable from each of the elements that belong to the sample

d)

A numerical value summarizing the sample data

81.

A statistic is...

a)

a planned activity whose results yield a set of data

b)

a numerical value that summarizes all of the data of an entire population

c)

the set of values collected from the variable from each of the elements that belong to the sample

d)

A numerical value summarizing the sample data

82.

Data is...

a)

a planned activity whose results yield a set of data

b)

a numerical value that summarizes all of the data of an entire population

c)

the set of values collected from the variable from each of the elements that belong to the sample

d)

A numerical value summarizing the sample data

83.

Which of the following statements about variables is correctly paired?

a)

A qualitative variable describes or categorizes an element of population, while a quantitative variable quantifies an element of a population

b)

A quantitative variable describes or categorizes an element of population, while a qualitative variable quantifies an element of a population

c)

A qualitative variable describes an element of the sample population, while a quantitative variable quantifies an element of total population

d)

A quantitative variable describes an element of the sample population, while a qualitative variable quantifies an element of total population

84.

A nominal variable...

a)

is a qualitative variable that characterizes, describes, or names an element of a population

b)

is a qualitative variable that incorporates an ordered position, or ranking

c)

a quantitative variable that can assume a countable number of values, in other words, there is a gap between any two values

d)

a quantitative variable that can assume an uncountable number of values, in other words, it includes every possible value between any two values

85.

An ordinal variable...

a)

is a qualitative variable that characterizes, describes, or names an element of a population

b)

is a qualitative variable that incorporates an ordered position, or ranking

c)

a quantitative variable that can assume a countable number of values, in other words, there is a gap between any two values

d)

a quantitative variable that can assume an uncountable number of values, in other words, it includes every possible value between any two values

86.

A discrete variable...

a)

is a qualitative variable that characterizes, describes, or names an element of a population

b)

is a qualitative variable that incorporates an ordered position, or ranking

c)

a quantitative variable that can assume a countable number of values, in other words, there is a gap between any two values

d)

a quantitative variable that can assume an uncountable number of values, in other words, it includes every possible value between any two values

87.

A continuous variable...

a)

is a qualitative variable that characterizes, describes, or names an element of a population

b)

is a qualitative variable that incorporates an ordered position, or ranking

c)

a quantitative variable that can assume a countable number of values, in other words, there is a gap between any two values

d)

a quantitative variable that can assume an uncountable number of values, in other words, it includes every possible value between any two values

88.
Which of the following is an example of a statistical question?
a)
What color shirt are you wearing?
b)
How many dogs do you have?
c)
What are the favorite ice cream flavors of CMS 6th graders?
d)
Is it a nice day outside?
89.
What makes a question statistical?
a)
Population
b)
Measurability
c)
Variability
d)
All of the above
90.
Identify the POPULATION in the following question: What are the ages of the students at Clarke Middle School?
a)
Students
b)
Age
c)
Clarke Middle School
91.
Identify the VARIABILITY in the following question: What are the ages of the students at Clarke Middle School?
a)
Ages
b)
Students
c)
Clarke Middle School
92.
What is the MODE of a data set?
a)
The middle value
b)
The number that occurs most frequently
c)
The average
d)
The difference between the max and min values
93.
What is the MEDIAN of a data set?
a)
The middle value
b)
The number that occurs most frequently
c)
The average
d)
The difference between the max and min values
94.
What is the RANGE of a data set?
a)
The middle value
b)
The number that occurs most frequently
c)
The average
d)
The difference between the max and min values
95.
What is the MEAN of a data set?
a)
The middle value
b)
The number that occurs most frequently
c)
The average
d)
The difference between the max and min values
96.
What is the median of the following data set:
1, 3, 4, 4, 5, 6, 7
a)
1
b)
4
c)
5
d)
7
97.
Based on the line plot, how many students ate 5 candy bars?
a)
4
b)
3
c)
8
d)
0
98.
What does it mean for a graph of data to be SYMMETRICAL?
a)
Most of the data is grouped to the left side
b)
Most of the data is grouped to the right side
c)
Most of the data is in the middle
(draw a line down the middle and both sides look the same)
99.
What does it mean for a graph of data to be SKEWED LEFT?
a)
Most of the data is grouped to the left side
b)
Most of the data is grouped to the right side
c)
Most of the data is in the middle
(draw a line down the middle and both sides look the same)
100.
What does it mean for a graph of data to be SKEWED RIGHT?
a)
Most of the data is grouped to the left side
b)
Most of the data is grouped to the right side
c)
Most of the data is in the middle
(draw a line down the middle and both sides look the same)
101.
Which answer shows categorical data?
a)
Age
b)
Height
c)
Number of cousins
d)
Favorite singer
102.
Which answer shows numerical data?
a)
Favorite animal
b)
Hours of sleep last night
c)
Hair color
d)
Elementary school you attended
103.
What is the median?
a)
62
b)
58
c)
66
d)
60
104.
What is the range of the set of data?
a)
70
b)
65
c)
80
d)
55
105.
What was the highest score on the math test?
a)
53
b)
79
c)
97
d)
90
106.

What percent of people are 3 standard deviations above the mean?

a)

.15

b)

34

c)

68

d)

2.35

107.

What percent of people within 1 standard deviation of the mean?

a)

99.7

b)

34

c)

68

d)

95

108.
21. How many students are represented by the histogram?  
a)
Cannot be determined
b)
9
c)
31
d)
35
109.
What is the range of the data shown in the stem and leaf plot?
a)
40
b)
56
c)
136
d)
96
110.
What is the median of the scores?
a)
21
b)
16
c)
17
d)
19
111.
Identify the outlier for the given data?
23, 34, 27, 7, 30, 26, 28, 31, 34
a)
7
b)
23
c)
31
d)
34
112.
How many students received a score in the 80's?
a)
2
b)
10
c)
14
d)
27
113.

This graph is

a)

Symmetric

b)

Skewed to the left

c)

Skewed to the right

d)

Incorrect

114.

What is the upper quartile(Q3) for both 1st Period and 2nd Period?

a)

80, 85

b)

90, 85

c)

100, 95

d)

90, 92

115.

What is the interquartile range of 2nd Periods test scores?

a)

12

b)

9

c)

15

d)

80

116.
What type of relationship does this graph have?
a)
Positive 
b)
Negative
c)
No Relationship
d)
Constant
117.
Which scatter plot show a positive relationship?
a)
Graph A
b)
Graph B
c)
Graph C
d)
Graph D
118.
Which scatter plot shows no relationship?
a)
Graph A
b)
Graph B
c)
Graph C
d)
Graph D
119.
Which scatter plot shows no relationship?
a)
Graph A
b)
Graph B
c)
Graph C
d)
Graph D
120.
Based on the scatterplot, which of the following conclusions about the relationship between her height and weight is true? 
a)
There is a negative relationship between height and weight
b)
There is a positive relationship between height and weight
c)
There is a constant relationship between height and weight
d)
There is no relationship between height and weight
121.
Which statement best represents this relationship?
a)
There is no relationship between the number of miles driven and the amount of gas remaining in the tank
b)
As the number of miles driven increases, the amount of gas remaining in the tank increases.
c)
As the number of miles driven increases, the amount of gas remaining in the tank decreases.
d)
A relationship cannot be determined from this scatter plot
122.
Which statement best describes the relationship shown in this scatter plot?
a)
Students with a bigger shoe size earn a higher math score
b)
Students with a smaller show size earn a higher math score
c)
A student's shoe size has no effect on their math score
d)
A student with a shoe size of 8 will always earn a score of 80%
123.
Based on the scatter plot, which statement best describes the trend?
a)
As the daily temperature increases, the number of beach visitors increases.
b)
as the daily temperature decreases, the number of beach visitors increases.
c)
As the daily temperature increases, there is no change in the number of beach visitors
d)
As the daily temperature increases, the number of beach visitors decreases
124.
The scatter plot shows the relationship between the number of chapters and the total number of pages for several books.  Use the trend line to predict how many chapters would be in a book with 180 pages. 
a)
12 chapters
b)
15 chapters
c)
18 chapters
d)
21 chapters
125.

Mrs. Spencer made scatterplot to show the relationship between the number of absences and a student’s final exam score. Based on this scatterplot, a student with 6 absences should get approximately what score on the final exam?

a)

65

b)

92

c)

70

d)

76

126.
What is the correlation between length of running start and distance of jump?
a)
positive:  the further you run the further you jump
b)
negative: the less you run the less distance of your jump
c)
positive: the further your running start the less your distance
127.
Make a prediction for a resting heart rate after 6 hours of exercise a week.
a)
6
b)
50
c)
55
d)
59
128.

The scatter plot below shows the number of books read by students in Mrs. Kenyon’s English class and their final grades. Which statement represents the best description about the line of best fit?

a)

The more books students read, the lower their English grade.

b)

The more books students read, the higher their English grade.

c)

The fewer books students read, the higher their English grade.

d)

No relationship exists between the number of books students read and their English grades.

129.
What is a line of best fit used for?
a)
To make predictions
b)
To make the graph look pretty
c)
To connect the points
d)
To make it look like you know what you are doing
130.
The scatter plot shows the relationship between the number of chapters and the total number of pages for several books. Use the trend line to predict how many pages would be in a book with 19 chapters. 
a)
150 pages
b)
170 pages
c)
190 pages
d)
210 pages
131.
Charlie rented a moving truck. He paid a daily fee plus a per-mile fee to rent the truck. The equation below represents the daily amount Charlie paid for the truck if he drives it x miles.
y=0.5x+10
What does the slope of the graph of this equation represent?
a)
The daily fee for the moving truck
b)
The per-mile fee for the moving truck
c)
How much Charlie paid for the truck
d)
The number of miles he drove
132.

These kind of observation use your senses to observe results.

a)

qualitative

b)

quantitative

133.

There were 4 fewer drops on the penny dipped in soap than the one dipped in oil.

a)

qualitative

b)

quantitative

c)

both

d)

neither

134.

There are 3 more blue beads than red beads.

a)

qualitative

b)

quantitative

c)

both

d)

neither

135.
Your teacher has asked you to explain the difference between quantitative and qualitative observations. Which statement is correct?
a)
Quantitative observations use numbers, qualitative uses the senses.
b)
Quantitative observations use the senses, qualitative uses numbers.
c)
Quantitative observations use measurement, qualitative uses numbers.
d)
Quantitative observations use colors, qualitative uses the senses.
136.
Dolphin colors range from gray to white.
a)
qualitative
b)
quantitative 
137.
Dolphins eat the equivalent of 4 - 5% of their body mass each day.
a)
qualitative
b)
quantitative
138.

There are 75 trees in the forest.

a)

qualitative

b)

quantitative

139.

The leaves on the plant are turning brown.

a)

qualitative

b)

quantitative

c)

both

d)

neither

140.

The plant has grown 4 cm since yesterday.

a)

qualitative

b)

quantitative

c)

both

d)

neither

141.
A value that is much higher or much lower than the other values in a set of data.
a)
Outlier
b)
Box Plot
c)
Range
d)
Histogram
142.

A condition that occurs when data points in a scatter plot are grouped more in one part of the graph than the other.

a)

Clustering

b)

Cluster

c)

Gap

d)

Outlier

143.
Ms. Sajewski surveyed her students on the number of book they read last summer. Which is NOT true?
a)
The mode number of books read is one
b)
The median number of books read is 1.5
c)
Ms. Sajewski surveyed 20 students
d)
The mean number of books read is 3.25
144.
Gabby conducted an experiment with a spinner.  Based on this data, how many times can she expect to spin a 2 in the next 25 spins?
a)
24
b)
6
c)
12
d)
14
145.
The graph compares Homework Time versus TV Time for a group of high school students.What is the interquartile range of homework time?
a)
40 minutes
b)
190 minutes
c)
28 minutes
d)
12 minutes
146.
The graph compares Homework Time versus TV Time for a group of high school students. Which statement is NOT true?
a)
The median for TV Time is the same as the 3rd quartile for Homework Time
b)
The median minutes for Homework Time is 12 less than the median minutes for TV Time
c)
75% of those surveyed watched TV for at least 15 minutes
d)
1/4 of students spent at least 20 minutes on homework
147.
The stem-and-leaf plots show the scores of two classes on the Chapter 6 Test. 
Which statement about the medians is true?
a)
Class A and Class B share the same median
b)
Class A's median is 3.5 points lower than Class B's median
c)
Class A's median is 4.5 points lower than Class B's median
d)
Class A's median is 6.5 points lower than Class B's median
148.
The stem-and-leaf plots show the scores of two classes on the Chapter 6 Test. 
Which statement about the data is NOT true?
a)
The mode of Class A is 78
b)
The range of Class B is higher than the range of Class A
c)
Class A's mean is 79
d)
The mode of Class B is 95
149.
The box-and-whisker plot compares test scores between 1st Period and 2nd Period.  Which statement is NOT true?
a)
The median for 1st Period is the same as the 1st quartile for 2nd Period
b)
The range of 1st Period is greater than the range of 2nd Period
c)
75% of students in 2nd Period scored 80 or better
d)
75% of students in 1st Period scored a 75 or less
150.
The box-and-whisker plot compares test scores between 1st Period and 2nd Period.  Which statement is NOT true?
a)
The 3rd quartile for 1st Period is 90
b)
The interquartile range for 1st Period is 15
c)
50% of students in 2nd Period scored an 85 or higher
d)
The range for 2nd Period is 11
151.
a)
A
b)
B
c)
C
d)
D
152.
How many more people 19 and under are in the French club than the Spanish club?
a)
1
b)
3
c)
2
d)
4
153.

Mai drew two box plots to show the scores for two groups of friends who went bowling. Which group shows greater variability?

a)

The first group shows greater variability because it has a wider range (120) and a wider IQR (50).

b)

The second group shows greater variability because there is a longer bottom whisker.

c)

The groups have about the same variability, but the first group had higher scores overall.

154.

This box plot displays information about the number of text messages some students sent one day. Is this data set symmetric? Explain how you know.

a)

Yes. It is equal on both sides of the median.

b)

Yes. The whiskers are the same width.

c)

No. The bottom quartile is much wider than the top one.

d)

No. The top quartile is much wider than the bottom quartile.

155.

The air quality was tested in many office buildings in two cities. The results of the testing is shown in these box plots. A level of less than 50 parts per million is considered healthy. A level of 50 or more parts per million is considered unhealthy.

Select all the statements that must be true.

a)

The lowest recorded measurement was in city Q.

b)

All buildings tested in city P are in the healthy range.

c)

The mean for city P is greater than the mean for city Q.

d)

The range for city Q is greater than the range for city P.

e)

The median for city P is greater than the median for city Q.

156.

Here’s a dot plot of a data set. Which statement is true about the mean of the data set?

a)

The mean is less than 5.

b)

The mean is equal to 5.

c)

The mean is greater than 5.

d)

There is not enough information to determine the mean.

157.

Select all the true statements.

a)

Given a box plot, it is always possible to calculate the mean of the data.

b)

Given a box plot, it is always possible to calculate the median of the data.

c)

Given a box plot, it is always possible to construct a corresponding dot plot.

d)

Given a dot plot, it is always possible to construct a corresponding box plot.

e)

Given a histogram, it is always possible to construct a corresponding box plot.

158.

Jada asked some students at her school how many hours they spent watching television last week, to the nearest hour. Here is a histogram for the data she collected. About how many students did Jada ask?

a)

30

b)

40

c)

100

d)

15

159.

What is the shape of this bar graph?

a)

Skew right

b)

Skew left

c)

Symmetrical

d)

uniform

160.
6. Which city has a higher median?
a)
Millersburg
b)
Arcadia
161.

Carrie is comparing the growth of plants under natural and artificial light sources.

Part B Use the box plots to make an inference using the variability of the data.

a)

On average group Q has a greater growth of plants under natural and artificial light sources.

b)

The sets have the same variability related to the growth of plants under natural and artificial light sources.

162.

Carrie is comparing the growth of plants under natural and artificial light sources.

Part A Use the measures of center from the box plots to make an inference about the data.

a)

On average group Q has a greater growth of plants under natural and artificial light sources.

b)

The sets have the same variability related to the growth of plants under natural and artificial light sources.

163.

Andy is comparing how long two tablets can be used after being fully charged.Use the measures of center to make an inference about the data.

a)

The IQR for tablet A is higher so tablet A's battery life is more consistent.

b)

The MAD is lower in tablet B's battery life so Tablet B is more consistent.

c)

On average Tablet A's battery will last longer.

d)

On average Tablet B's battery will last longer.

164.

Andy is comparing how long two tablets can be used after being fully charged.Use the measures of variability to make an inference about the data.

a)

The IQR for tablet A is higher so tablet A's battery life is more consistent.

b)

The MAD is lower in tablet B's battery life so Tablet B is more consistent.

c)

On average Tablet A's battery will last longer.

d)

On average Tablet B's battery will last longer.

165.

What is the upper and lower quartile?

a)

upper quartile is the highest number and the lower quartile is the lowest number

b)

upper quartile is the lowest number and the lower quartile is the highest number

c)

upper quartile is the median of the upper set of data and the lower quartile is the median of the lower set of data

d)

upper quartile is the median of the lower set of data and the lower quartile is the median of the upper set of data

166.

What is the upper and lower extreme?

a)

upper extreme is the highest number and the lower extreme is the lowest number

b)

upper extreme is the lowest number and the lower extreme is the highest number

c)

upper extreme is the median of the upper set of data and the lower extreme is the median of the lower set of data

d)

upper extreme is the median of the lower set of data and the lower extreme is the median of the upper set of data