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Big AP Stats Review (#1)

Total questions: 76

Worksheet time: 3hrs 5mins

Name
Class
Date
1.

The entire collection of individuals or objects about which information is desired is called a sample.

a)

True

b)

False

2.

Methods for summarizing data make up the branch of statistics called

a)

Descriptive Statistics

b)

Inferential Statistics

c)

Probability

3.

A primary use of inferential statistics is to make generalizations from a sample to a population.

a)

True

b)

False

4.

A data set is discrete if the possible values are isolated points on the number line.

a)

True

b)

False

5.

Frequency distributions can be used with _______ data.

a)

Categorical

b)

Quantitative

c)

Both Categorical & Quantitative

6.

The relative frequency for a particular category is the number of times the category appears in the data.

a)

True

b)

False

7.

Dotplots work best for small and moderate sized numerical data sets.

a)

True

b)

False

8.

Bar charts should be used with categorical data.

a)

True

b)

False

9.

A data set consisting of many observations of a single characteristic is a categorical data set.

a)

True

b)

False

10.

A data set is multivariate if it consists only of numeric variables.

a)

True

b)

False

11.

By definition, a simple random sample of size n is any sample that is selected in a manner to guarantee every individual in the population has an equal chance of selection.

a)

True

b)

False

12.

Clusters are non-overlapping subgroups of a population that have been identified as homogeneous.

a)

True

b)

False

13.

Blocking is a technique that can be used to filter out the effects of extraneous (confounding) factors.

a)

True

b)

False

14.

Response bias can occur when responses are not actually obtained from all individuals selected for inclusion in the sample.

a)

True

b)

False

15.

Selection bias can occur if volunteers only are used in a study.

a)

True

b)

False

16.

Increasing sample size will generally eliminate bias in a sample.

a)

True

b)

False

17.

A study is an observational study if the investigator observes the behavior of a response variable when one or more factors are manipulated.

a)

True

b)

False

18.

As long as the sample size is small relative to the population, there is little practical difference between sampling with replacement and sampling without replacement.

a)

True

b)

False

19.

A treatment is any particular combination of values for the explanatory variables.

a)

True

b)

False

20.

Two factors are confounding if their effects on the response variable cannot be distinguished from one another.

a)

True

b)

False

21.

Random assignment to treatments will guarantee groups that are exactly alike for experimental purposes.

a)

True

b)

False

22.

Random assignment of volunteers should result in comparable experimental groups.

a)

True

b)

False

23.

Replicating in an experiment means that the number of subjects is greater than 1.

a)

True

b)

False

24.
In a discrete data, what name is given to the item occurring most frequently?
a)
Median
b)
Mode
c)
Mean
d)
Frequency
25.
For a data containing 15 items arranged in ascending order, what item is the median of the data
a)
7th item
b)
8th item
c)
6th and 7th item 
d)
7th and 8th item
26.
What is an outlier?
a)
A data point that cannot be explained
b)
A data point that is normal
c)
A data point that does not fit the overall pattern
d)
A data point that has eaten too much ice cream
27.

How is the data distributed in this histogram?

a)

Symmetrically

b)

Skewed Right

c)

Skewed Left

28.

You have a mean of 56 and a standard deviation of 4.3. What is +2 standard deviations from the mean?

a)

60.3

b)

47.4

c)

51.7

d)

64.6

29.
What is the Q3 of this data set?
6, 7, 2, 1, 5, 2, 1, 6
a)
5
b)
6
c)
5.5
d)
6.5
30.
Which of the following lists all parts of the five number summary?
a)
Mean, Median, Mode, Range, and Total
b)
Minimum, Quartile 1, Median, Quartile 3, and Maximum 
c)
Smallest, Q1, Q2, Q3, and Q4
d)
Minimum, Maximum, Range, Mean, and Median
31.
Tests in Mr. Jones class have a mean score of 73 and standard deviation of 6 points. Mark scored a 68 on the test. What is his z-score?
a)
0.83
b)
5
c)
-0.83
d)
-5
32.
What does a z-score of 0 mean?
a)
The score is equal to the mean.
b)
The score is 0 points. 
c)
There is no data.
d)
You can't tell unless you know the data is normal. 
33.

Which is the symbol for sample mean?

a)

b)

μ

c)

n

d)

Σ

34.
What shape is a normal distribution curve?
a)
Half curve
b)
Round curve
c)
Bell curve
d)
Square curve
35.
Describe the correlation in the graph shown.
a)
Strong Negative
b)
Strong Positive
c)
Weak Negative
d)
Weak Positive
36.
What is an outlier?
a)
A data point that cannot be explained
b)
A data point that is normal
c)
A data point that does not fit the overall pattern
d)
A data point that has eaten too much ice cream
37.
Residuals are . . . 
a)
possible models not explored by the researcher
b)
variation in the response variable that is explained by the model
c)
the difference between the observed response and the values predicted by the model
d)
data collected from individuals that is not consistent with the rest of the group
38.
Shown is a residual plot. Would a linear regression model of the data be most appropriate?
a)
YES
b)
NO
39.
The correlation coefficient r is a value between
a)
0 and 1
b)
0 and 100
c)
-1 and 1
d)
-2 and 2
40.

How is the data distributed in this histogram?

a)

Symmetrically

b)

Skewed Right

c)

Skewed Left

41.

You have a mean of 56 and a standard deviation of 4.3. What is +2 standard deviations from the mean?

a)

60.3

b)

47.4

c)

51.7

d)

64.6

42.
Which of the following lists all parts of the five number summary?
a)
Mean, Median, Mode, Range, and Total
b)
Minimum, Quartile 1, Median, Quartile 3, and Maximum 
c)
Smallest, Q1, Q2, Q3, and Q4
d)
Minimum, Maximum, Range, Mean, and Median
43.
What is the Q3 of this data set?
6, 7, 2, 1, 5, 2, 1, 6
a)
5
b)
6
c)
5.5
d)
6.5
44.

To select a cluster sample, divide a population into groups, then select all the members in some of the groups.

a)

True

b)

False

45.

Using a stratified sample guarantees that members of each group within a population will be sampled.

a)

True

b)

False

46.
What is the minimum value?
a)
64
b)
58
c)
66
d)
60
47.
What is the maximum value?
a)
58
b)
66
c)
64
d)
60
48.
What data value is the upper quartile (Q3)?
a)
64
b)
62
c)
66
d)
58
49.
Roger bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is Roger's median score?
a)
127
b)
155
c)
156
d)
193
50.
What value is the lower quartile?
a)
66
b)
58
c)
60
d)
64
51.
What is the median?
a)
62
b)
58
c)
66
d)
60
52.
What is the interquartile range (IQR)?
a)
4
b)
64
c)
60
d)
8
53.
Which box and whisker plot has the highest median?
a)
Top plot
b)
Bottom plot
54.
What is the term for the median of the lower half of the data?
a)
Lower Quartile
b)
Upper Quartile
c)
Median
d)
Maximum
55.
What is the term for the median of the upper half of the data?
a)
Upper Quartile
b)
Lower Quartile
c)
Median
d)
Minimum
56.
What is the highest score in the class?
a)
88%
b)
100%
c)
13
d)
98%
57.
How many students received a score of 94%? 
a)
94
b)
4
c)
1
d)
2
58.
How many students received a score in the 80's?
a)
2
b)
10
c)
14
d)
27
59.
What is the range of the test scores?
a)
15
b)
100
c)
6
d)
10
60.
What is the MODE of this data?
a)
90
b)
85, 90, and 95
c)
85 and 95
d)
None
61.
What is the MODE of this data?
a)
90
b)
85, 90, and 95
c)
85 and 95
d)
None
62.
What is the MEDIAN of this data?
a)
65
b)
40
c)
915
d)
13
63.
The data set below has an outlier of 42.
2, 5, 12, 15, 19, 4, 6, 11, 16, 18, 12, 12, 42
What effect does removing the outlier have on the distribution of the data?
a)
The mean will decrease
b)
The median will decrease
c)
The mean will increase
d)
The median will increase
64.
A data set is shown below.
56, 64, 73, 59, 98, 65, 59
If the outlier is removed from the data set, which measure of central tendency will be least affected?
a)
range
b)
mode
c)
median
d)
mean
65.
Describe the data distribution shape of the graph.
a)
Skewed right
b)
Skewed left
c)
Uniform
d)
Symmetrical
66.
Which of the following best describes the shape of the distribution?
a)
SKEWED LEFT
b)
SKEWED RIGHT
c)
UNIFORM
d)
SYMMETRICAL
67.
Which of the following best describes the shape of the distribution?
a)
SKEWED LEFT
b)
SKEWED RIGHT
c)
UNIFORM
d)
SYMMETRICAL
68.
Which of the following best describes the shape of the distribution?
a)
SKEWED LEFT
b)
SKEWED RIGHT
c)
UNIFORM
d)
SYMMETRICAL
69.

What is the shape of the distribution?

a)

Skewed Left

b)

Skewed Right

c)

Symmetric

70.
a)
only 2nd period is symmetric
b)
both plots are symmetric
c)
5th period is bimodal
d)
2nd period's center is higher than 5th period
71.
a)
the median wait time for both rides is 35
b)
the Red Racer has a lower maximum than the Wild Viper
c)
the Wild Viper has a larger spread than Red Racer
d)
the Red Racer has a larger IQR than the Wild Viper
72.

When using IQR to find outliers, which formula will identify the lower limit?

a)

Q3 - 1.5(IQR)

b)

Q1 + 1.5(IQR)

c)

Q1 - 1.5(IQR)

d)

Q3 + 1.5(IQR)

73.

The salaries of the employees in a company are listed below:

$28,000 $45,000

$31,000 $42,000

$55,000 $72,000

$88,000 $53,000

If $88,000 was found to be an outlier, which salary would be the new maximum?

a)

$55,000

b)

$28,000

c)

$88,000

d)

$72,000

74.

Find the median, first quartile, third quartile, and interquartile range of the data.

32, 53, 72, 66, 47, 54, 49, 67, 71

a)

Median: 54

First Quartile: 49

Third Quartile: 67

IQR: 18

b)

Median: 54

First Quartile: 48

Third Quartile: 69

IQR: 21

c)

Median: 54

First Quartile: 48

Third Quartile: 69

IQR: 22

d)

Median: 54

First Quartile: 49

Third Quartile: 69

IQR: 20

75.
Use the 1.5 IQR rule to determine if there are any outliers for the following numbers:
84, 88, 72, 74, 98, 16, 94 
a)
Yes, 16 is an outlier.
b)
Yes, 33 is an outlier.
c)
Yes, 98 is an outlier.
d)
There are no numbers less than 39 or greater than 124, therefore there are no outliers.
76.
Using the information below, identify which of the following is NOT an outlier:
Q1 = 53
Q2 = 55
Q3=61
a)
73
b)
40
c)
80
d)
73.5