WorksheetsStatistics Unit Review
Total questions: 45
Worksheet time: 2hrs 45mins
Name
Class
Date
1.
The following scatter plot shows Pam's training as she prepares to run a 6 mile race at the end of the month. Which of the following would be a reasonable approximation for the length of time it would take for her to run 6 miles?
a)
A. 50 min
b)
B. 80 min
c)
C. 45 min
d)
D. 60 min
2.
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
3.
1. Mrs. Collins made a 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
4.
What type of correlation (association)?
The outside temperature and the amount of layers you wear.
The outside temperature and the amount of layers you wear.
a)
Positive correlation
b)
Negative correlation
c)
No correlation
5.
What type of correlation?
The temperature outside and the amount of ice cream sales.
The temperature outside and the amount of ice cream sales.
a)
Positive correlation
b)
Negative correlation
c)
No correlation
6.
The number of siblings you have and your weight.
a)
Positive correlation
b)
Negative correlation
c)
No correlation
7.
Mrs. Collins made a 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)
85
b)
92
c)
70
d)
76
8.
If Gold's Gym paid $250 for each TV, how many did they buy?
a)
35
b)
30
c)
45
d)
20
9.
If the carpenter worked for 6 days, how much did he earn?
a)
1250
b)
1500
c)
1750
d)
2000
10.
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
11.
Make a prediction for a resting heart rate after 6 hours of exercise a week.
a)
6
b)
50
c)
55
d)
59
12.
The scatter plot below shows the number of books read by students in Mrs. Hall’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.
13.
According to the graph, how many students are in the class?
a)
26
b)
25
c)
15
d)
30
14.
If Zion works 45 hours a week, how much will his weekly salary be?
a)
about $500
b)
$600
c)
about $700
d)
$1500
15.
What type of correlation does this graph have?
a)
positive
b)
negative
c)
none
d)
all of the above
16.
What type of correlation does this graph have?
a)
Negative
b)
no association
c)
positive
17.
What type of correlation does this graph have?
a)
positive
b)
negative
c)
none
d)
all of the above
18.
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
19.
Mrs. Collins made a 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
20.
The scatter plot below shows the number of books read by students in Mrs. Hall’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.
21.
As x increases, y decreases.
a)
no correlation
b)
negative correlation
c)
correlation coefficient
d)
positive correlation
22.
As x increases, y increases
a)
correlation coefficient
b)
causation
c)
positive correlation
d)
negative correlation
23.
What type of correlation or association is the scatter plot?
a)
Positive Association
b)
Negative Correlation
c)
No Association
d)
Undefined Correlation
24.
What is the first step when calculating the Mean Absolute Deviation?
a)
Find the distance each value is from the mean
b)
Find the mean of the distances
c)
Find the mean of the data
25.
What is the second step when calculating the Mean Absolute Deviation?
a)
Find the distance each value is from the mean
b)
Find the mean of the distances
c)
Find the mean of the data
26.
What is the third step when calculating the Mean Absolute Deviation?
a)
Find the distance each value is from the mean
b)
Find the mean of the distances
c)
Find the mean of the data
27.
Find the Mean Absolute Deviation: 10, 9, 3, 8, 10. The Mean is 8
a)
3
b)
5
c)
1
d)
2
28.
What is another word for average?
a)
Mean
b)
Median
c)
Mode
d)
Range
29.
True or false? :The larger the Mean Absolute Deviation the more consistent the data is.
a)
True
b)
False
30.
True or false?:The absolute value of a number will always be positive.
a)
True
b)
False
31.
In calculating MAD, after you find the average or mean you must _____________.
a)
do nothing because you're done
b)
Find out the distance each number is from the mean.
c)
Find the distance each number is from zero.
32.
Which of the following is the mean absolute deviation for the set of data?
2.50 3.75 1.25 2.25 3.00
2.50 3.75 1.25 2.25 3.00
a)
3.3
b)
0.66
c)
2.50
d)
2.55
33.
Find the MAD:
58, 38, 54, 48, 26, 36
58, 38, 54, 48, 26, 36
a)
43
b)
20
c)
10
d)
12
34.
Find the MAD for the following set: 85, 90, 68, 75, 79
a)
79.4
b)
6.48
c)
32.4
d)
79
35.
Find the MAD of the following data sets: $29, $58, $15, $129, $75, $22
a)
196
b)
54.7
c)
114
d)
32.67
36.
Find the MAD for the following set: 65, 90, 85, 70, 70, 95, 55
a)
12.24
b)
75.7
c)
85.7
d)
40
37.
1. Carlos wants to know the favorite sport of people at his school so he asks his baseball team.
a)
Biased
b)
Unbiased
38.
7. A public library asked every 10th person who entered to name the type of book they were getting
a)
Biased
b)
Unbiased
39.
3. A hospital wants to open a gym. They ask the night-shift ER staff when they would use the gym.
a)
Biased
b)
Unbiased
40.
4. A company makes DVDs and randomly selects 25 from 1500 to test them to see if they work.
a)
Biased
b)
Unbiased
41.
10. A senator wants to how she is doing. She sends a survey to 1000 registered voters in her party
a)
Biased
b)
Unbiased
42.
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
43.
To determine if my students like Math, I surveyed every 3rd student that walked into my classroom. This is an example of a ...
a)
simple random sample
b)
systematic random sample
c)
convenience sample
d)
voluntary response sample
44.
To determine how many students at Shull would attend the dance, the principal surveyed the students in Ms. Miller's math class. 10 students said they would attend and 15 said they would not attend. It can be concluded that half the students at Shull will attend the dance. Is this conclusion valid? Why or why not?
a)
Yes, this is a simple random sample. So the sample is unbiased.
b)
No, this is a convenience sample. So the sample is unbiased.
c)
No, this is a voluntary response sample. So the sample is biased.
d)
No, this is a convenience sample. So the sample is biased.
45.
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
100 %
