Question 1

Imagine that I have a jar that contains20 black poker chips and 40 red poker chips. What is the probability of selecting a red poker chip?​

Accepted Answer

​40/60 = 0.67

Question 2

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of selecting a student whose score is 300 or lower followed by selecting a student whose score is 700 or higher on the test?​

Accepted Answer

A)  0.0005​
B)  0.002
C)  0.022
D)  0.045 A

Question 3

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 400 or higher on the test?

Accepted Answer

A)  0.84
B)  0.50
C)  0.16
D)  0.34 A

Question 4

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 400 or lower or 700 or higher on the test?

Accepted Answer

A)  0.12
B)  0.18
C)  0.45
D)  0.24

Question 5

Inferential statistics allow us to​

Accepted Answer

A)  infer something about the sample based on the population.
B)  infer something about the population based on the sample.
C)  infer that the sample is representative.
D)  all of the options are correct

Question 6

A liberal statistical test is one that

Accepted Answer

A)  minimizes both Type I and Type II errors.
B)  minimizes Type I errors but increases Type II errors.
C)  minimizes Type II errors but increases Type I errors.
D)  decreases the chance of Type I errors.

Question 7

No effect is to _____ hypothesis as effect is to _____ hypothesis.​

Accepted Answer

A)  null; alternative
B)  alternative; null
C)  one-tailed; two-tailed
D)  two-tailed; one-tailed

Question 8

Imagine that I have a jar that contains20 black poker chips and 40 red poker chips. What is the probability of selecting a red poker chip or a black poker chip?​

Accepted Answer

The answer of Imagine that I have a jar that...

Question 9

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 300 or lower or 700 or higher on the test?

Accepted Answer

A)  0.124
B)  0.022
C)  0.045
D)  0.245

Question 10

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of selecting a student whose score is 400 or lower followed by selecting a student whose score is 500 or higher on the test?​

Accepted Answer

A)  0.005
B)  0.022
C)  0.045
D)  0.08

Question 11

If weight in the general population is normally distributed with an average of 160 pounds and a standard deviation of 20 pounds, what is the probability of selecting someone who weighs 120 or less or 170 or more pounds?

Accepted Answer

The answer of If weight in the general population is...

Question 12

Imagine that I have a jar that contains 20 black poker chips and 40 red poker chips. What is the probability of selecting a black poker chip?​

Accepted Answer

The answer of Imagine that I have a jar that...

Question 13

Identify when it would be appropriate to use a parametric versus a nonparametric test.​

Accepted Answer

The answer of Identify when it would be appropriate to...

Question 14

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 300 or higher on the test?

Accepted Answer

A)  0.98
B)  0.02
C)  0.12
D)  0.75

Question 15

In a study on the effects of amount of sleep on driving performance, researchers predict that those in the group that is allowed more sleep will exhibit better driving performance. The researchers are using a _____ hypothesis.​

Accepted Answer

A)  two-tailed​
B)  directional
C)  one-tailed​
D)  one-tailed and directional

Question 16

Failing to reject H0 when we should have rejected it is a _____ error.

Accepted Answer

A)  Type I​
B)  Type II
C)  null
D)  one-tailed

Question 17

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 600 or higher on the test?​

Accepted Answer

A)  0.84
B)  0.50
C)  0.16
D)  0.34

Question 18

What are inferential statistics and how do they differ from descriptive statistics?​

Accepted Answer

The answer of What are inferential statistics and how do...

Question 19

What is the probability of three tails in three flips of a coin?​

Accepted Answer

A)  0.25
B)  0.75
C)  0.125
D)  0.50

Question 20

Explain how Type I and Type II errors are related to false alarms and misses.​

Accepted Answer

The answer of Explain how Type I and Type II...

Exam 7: Probability and Hypothesis Testing

Imagine that I have a jar that contains20 black poker chips and 40 red poker chips. What is the probability of selecting a red poker chip?

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of selecting a student whose score is 300 or lower followed by selecting a student whose score is 700 or higher on the test?

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 400 or higher on the test?

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 400 or lower or 700 or higher on the test?

Inferential statistics allow us to

A liberal statistical test is one that

No effect is to _ hypothesis as effect is to _ hypothesis.

Imagine that I have a jar that contains20 black poker chips and 40 red poker chips. What is the probability of selecting a red poker chip or a black poker chip?

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 300 or lower or 700 or higher on the test?

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of selecting a student whose score is 400 or lower followed by selecting a student whose score is 500 or higher on the test?

If weight in the general population is normally distributed with an average of 160 pounds and a standard deviation of 20 pounds, what is the probability of selecting someone who weighs 120 or less or 170 or more pounds?

Imagine that I have a jar that contains 20 black poker chips and 40 red poker chips. What is the probability of selecting a black poker chip?

Identify when it would be appropriate to use a parametric versus a nonparametric test.

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 300 or higher on the test?

In a study on the effects of amount of sleep on driving performance, researchers predict that those in the group that is allowed more sleep will exhibit better driving performance. The researchers are using a _____ hypothesis.

Failing to reject H₀ when we should have rejected it is a _____ error.

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 600 or higher on the test?

What are inferential statistics and how do they differ from descriptive statistics?

What is the probability of three tails in three flips of a coin?

Explain how Type I and Type II errors are related to false alarms and misses.

Exam 7: Probability and Hypothesis Testing

Imagine that I have a jar that contains20 black poker chips and 40 red poker chips. What is the probability of selecting a red poker chip?​

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of selecting a student whose score is 300 or lower followed by selecting a student whose score is 700 or higher on the test?​

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 400 or higher on the test?

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 400 or lower or 700 or higher on the test?

Inferential statistics allow us to​

A liberal statistical test is one that

No effect is to _____ hypothesis as effect is to _____ hypothesis.​

Imagine that I have a jar that contains20 black poker chips and 40 red poker chips. What is the probability of selecting a red poker chip or a black poker chip?​

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 300 or lower or 700 or higher on the test?

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of selecting a student whose score is 400 or lower followed by selecting a student whose score is 500 or higher on the test?​

If weight in the general population is normally distributed with an average of 160 pounds and a standard deviation of 20 pounds, what is the probability of selecting someone who weighs 120 or less or 170 or more pounds?

Imagine that I have a jar that contains 20 black poker chips and 40 red poker chips. What is the probability of selecting a black poker chip?​

Identify when it would be appropriate to use a parametric versus a nonparametric test.​

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 300 or higher on the test?

In a study on the effects of amount of sleep on driving performance, researchers predict that those in the group that is allowed more sleep will exhibit better driving performance. The researchers are using a _____ hypothesis.​

Failing to reject H0 when we should have rejected it is a _____ error.

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 600 or higher on the test?​

What are inferential statistics and how do they differ from descriptive statistics?​

What is the probability of three tails in three flips of a coin?​

Explain how Type I and Type II errors are related to false alarms and misses.​

Imagine that I have a jar that contains20 black poker chips and 40 red poker chips. What is the probability of selecting a red poker chip?

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of selecting a student whose score is 300 or lower followed by selecting a student whose score is 700 or higher on the test?

Inferential statistics allow us to

No effect is to _ hypothesis as effect is to _ hypothesis.

Imagine that I have a jar that contains20 black poker chips and 40 red poker chips. What is the probability of selecting a red poker chip or a black poker chip?

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of selecting a student whose score is 400 or lower followed by selecting a student whose score is 500 or higher on the test?

Imagine that I have a jar that contains 20 black poker chips and 40 red poker chips. What is the probability of selecting a black poker chip?

Identify when it would be appropriate to use a parametric versus a nonparametric test.

In a study on the effects of amount of sleep on driving performance, researchers predict that those in the group that is allowed more sleep will exhibit better driving performance. The researchers are using a _____ hypothesis.

Failing to reject H₀ when we should have rejected it is a _____ error.

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 600 or higher on the test?

What are inferential statistics and how do they differ from descriptive statistics?

What is the probability of three tails in three flips of a coin?

Explain how Type I and Type II errors are related to false alarms and misses.