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AP Statistics Course Check #1

Total questions: 40

Worksheet time: 1hrs 20mins

Name
Class
Date
1.
This is an example of a
a)
frequency table
b)
dot plot
c)
box-and-whisker
d)
histogram
2.
Is the data skewed right, left, or symmetrical?
a)
right
b)
left
c)
symmetrical
3.
What is the IQR of this data set? 
37 42 48 51 52 53 54 54 55
a)
5
b)
6
c)
8
d)
9
4.
What percent does each of the 4 sections contain on a box and whisker plot?
a)
100%
b)
75%
c)
50%
d)
25%
5.
Which of the following is an example of categorical data?
a)
High School Graduate or Not
b)
Annual Income
c)
Years of Schooling Completed
d)
Years of playing an instrument
6.

Find the Z-score.

Mean = 22

Standard Deviation: 3.1

x = 29

a)

2.26

b)

16.45

c)

-2.26

d)

1.26

7.

Find the mean.

Z-score = -1.4

Standard Deviation: 7

x = 20

a)

29.8

b)

10.2

c)

-21

d)

35

8.
Describe the correlation in the graph shown.
a)
Strong Negative
b)
Strong Positive
c)
Weak Negative
d)
Weak Positive
9.
What letter do we use to represent correlation coefficient?
a)
c
b)
r
c)
p
d)
h
10.

Is r = -0.87 strong, moderate, or weak?

a)

strong

b)

moderate

c)

weak

11.
Estimate the value of r:
a)
0.03
b)
-0.99
c)
0.79
d)
-0.72
12.
How do you calculate a residual?
a)
Observed - Predicted
b)
Predicted - Observed
13.
What type of correlation exists between the temperature outside and the number of hot chocolate sold at a football game.
a)
positive
b)
negative 
c)
no correlation
d)
unknown
14.
Kim surveys 100 moviegoers that entered the movie theater in the first hour.  What type of sampling method is this?
a)
Random
b)
Convenience
c)
Biased
15.

A large company wants to conduct a survey to determine the proportion of its male employees who practice yoga on a daily basis. Two of its regional offices are chosen at random and all of the male employees at each office are surveyed. The plan is an example of which type of sampling?

a)

Cluster

b)

Convenience

c)

Simple random

d)

Stratified random

e)

Systematic

16.

Joe Mama wants to do an observational study comparing height and weight. He also does a study comparing weight and calories consumed daily. He concludes that the more calories you consume, the more you weigh. And people who weigh more are generally taller. Therefore, if you eat more, you will get taller. Why is this incorrect?

a)

Causation from one observational study cannot be extrapolated and applied to another

b)

Correlation does not indicate causation

c)

He is ignoring the lurking variable of age

d)

He did not have a control group

17.
Every possible group of units of the required size has the same chance of being the selected sample as any other sample of the same size.
a)
Simple Random 
b)
Thoughtful
c)
Typical
d)
Proportional
18.
This sample is selected by dividing the population into subgroups and then taking a fixed number of units from each group using the simple random sample.
a)
stratified
b)
cluster
c)
judgment
d)
experimental
19.
A company states that 2% of its computers are returned for defects.  We take a sample of 100 computers to find the probability of 10 being defective.  Is this a binomial distribution?
a)
No because there is not a fixed number of trials.
b)
No because their are more than 2 outcomes.
c)
Yes since there are a fixed number of independent trials, outcomes in 2 categories, and the probability of defect is constant.
d)
No since computers would not be independent.
20.
On an eight question multiple choice quiz with 4 answers for each question, what is the probability of guessing and getting 6 correct answers?
a)
.004
b)
.109
c)
.003
d)
.9996
21.
P(Sandals):
a)
16/22
b)
20/36
c)
5/9
d)
20/16
22.
Find the area under the standard normal curve where z < 2.42 .
a)
.008
b)
.992
c)
.301
d)
.862
23.
In the formula shown, what is in the denominator?
a)
Sample Mean
b)
Individual Score
c)
Sample Variance
d)
Sample Standard Deviation
24.
What is the probability that a family doesn't have a baby girl until their third child?
a)
0.13
b)
0.15
c)
0.05
d)
0.88
25.
The probability that Jalen makes a free throw is 75%. What is the probability he makes his first free throw on his third attempt?
a)
geometcdf(3, 0.75)
b)
geometpdf(0.75, 3)
c)
geometpdf(3, 0.75)
d)
geometcdf(0.75, 3) 
26.
Given the probability model in the table below, what is the expected value of the random variable?
  X        50          20        5
P(X)     0.1         0.3      0.6
a)
14
b)
4.67
c)
5
d)
7.5
27.
A coin is flipped 3 times. If you get tails once you get $5, tails twice you get $15, and tails on all three flips you get $40. What is the expected amount of money you will get?
a)
$12.50
b)
$5
c)
$7.50
d)
$10
28.

The Gallup Poll asked a random sample of 1785 adults whether they attended church during the past week. Let p-hat be the proportion of people in the sample who attended church. A newspaper report claims that 40% of all U.S. adults went to church last week. Suppose this claim is true.

What is the mean of the sampling distribution of p-hat?

a)

0.40

b)

0.44

c)

0.56

d)

0.60

29.
What happens to the shape of a sampling distribution of sample means as n increases?
a)
It becomes narrower and bimodal.
b)
It becomes narrower and more normal.
c)
It becomes wider and skewed right. 
d)
It becomes wider and more normal. 
30.
These symbols represent the mean and standard deviation for which of the following distributions?
a)
The Population
b)
The Sample
c)
The Sampling Distribution
31.
These symbols represent the mean and standard deviation for which of the following distributions?
a)
The Population
b)
The Sample
c)
The Sampling Distribution
32.
These symbols represent the mean and standard deviation for which of the following distributions?
a)
The Population
b)
The Sample
c)
The Sampling Distribution
33.

A random sample of 49 medical doctors in LA showed that they worked an average of 53.1 hours/week with a standard deviation of 7.2 hours/week. If the California average is 60 hours/week, does this give evidence that the LA doctors work significantly less than the rest of California? What test should be used?

a)

One-Sample T Test for a Mean

b)

One-Sample Z Test for a Mean

c)

One-Sample T Test for a Proportion

d)

One-Sample Z Test for a Proportion

34.

USA Today reported that in 1992, 39% of all elementary school children claimed that when they grow up they want to do something to help other people. However, in 1995, 128 of a random sample of 317 of these same children claimed that when they grow up they want to do something to help other people. Does this information indicate that there has been an attitude change either way? What test should be used?

a)

One-Sample Z Test for a Proportion

b)

Two-Sample Z Test for the Difference in Proportions

c)

One-Sample T Test for a Mean

d)

Two-Sample T Test for the Difference in Means

35.

The manager of a sporting goods store offered a bonus commission to his salespeople when they sold moregoods. A new manager dropped the bonus system. For a random sample of six sales people, the weeklysales (in thousands of dollars) are shown in the following table with and without the bonus system

Salesperson 1 2 3 4 5 6

with bonus 2.9 3.0 5.8 4.4 5.3 5.6

w/o bonus 2.8 2.5 5.9 3.5 4.6 4.6

difference 0.1 0.5 -0.1 0.9 0.7 1.0


What test should be used?

a)

Matched-Pairs T Test for a Mean

b)

One-Sample T Test for a Mean

c)

Two-Sample T Test for the Difference in Means

36.

Dannon is supposed to put 29.6 grams of fruit in their fruit-flavored yogurt. To see if enough fruit is being placed in cups of fruit-flavored yogurt, a quality inspector measured the amount in 27 containers.She found an average of 28.9 grams of fruit and standard deviation of 2.8 grams. Does this show that there is probably enough yogurt in the cups? What test should be used?

a)

One-Sample T Test for a Mean

b)

One-Sample Z Test for a Proportion

c)

Matched-Pairs T Test for a Mean

d)

Chi-Square Goodness of Fit Test

37.
Margin of error equals:
a)
Critical Value ∗ standard Error
b)
z*
c)
1.96
d)
Standard Error
38.
What does it mean when a test is statistically significant?
a)
it has reached alpha level status
b)
the test statistic had a P-value higher than the alpha level
c)
the test statistic had a P-value lower than the alpha level
d)
it is important in practical terms
39.
How can you reduce both Type I and Type II errors?
a)
it can't be reduced
b)
redo the tests
c)
increase the sample size
d)
tamper with the data
40.

Which episode of Star Wars is the best? (Choices are 1 through 9).

4 lines

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