Question 1

​When the null hypothesis is not rejected, it is​

Accepted Answer

A)  possible a Type I error has occurred. 
B)  possible a Type II error has occurred. 
C)  not possible a Type II error has occurred. 
D)  ​possible either a Type I or a Type II error has occurred. 
A)  possible a Type I error has occurred. 
B)  possible a Type II error has occurred. 
C)  not possible a Type II error has occurred. 
D)  ​possible either a Type I or a Type II error has occurred.

Question 2

The probability of making a Type I error is denoted by

Accepted Answer

A)  α. 
B)  β. 
C)  1 - α. 
D)  1 - β. 
A)  α. 
B)  β. 
C)  1 - α. 
D)  1 - β.

Question 3

When the p-value is used for hypothesis testing, the null hypothesis is rejected if

Accepted Answer

A)  p-value $\leq$ $\alpha$. 
B)  $\alpha$ < p-value. 
C)  p-value = 1 - $\alpha$/2. 
D)  p-value = 1 - $\alpha$. 
A)  p-value $\leq$ $\alpha$. 
B)  $\alpha$ < p-value. 
C)  p-value = 1 - $\alpha$/2. 
D)  p-value = 1 - $\alpha$.

Question 4

An assumption made about the value of a population parameter is called a(n)

Accepted Answer

A)  hypothesis. 
B)  conclusion. 
C)  error. 
D)  probability. 
A)  hypothesis. 
B)  conclusion. 
C)  error. 
D)  probability.

Question 5

Read the z statistic from the normal distribution table and circle the correct answer.For a one-tailed test (lower tail) using α = .0630, z =

Accepted Answer

A)  -1.86. 
B)  -1.53. 
C)  -1.96. 
D)  -1.645. 
A)  -1.86. 
B)  -1.53. 
C)  -1.96. 
D)  -1.645.

Question 6

The power curve provides the probability of

Accepted Answer

A)  correctly accepting the null hypothesis. 
B)  incorrectly accepting the null hypothesis. 
C)  incorrectly rejecting the null hypothesis. 
D)  correctly rejecting the null hypothesis. 
A)  correctly accepting the null hypothesis. 
B)  incorrectly accepting the null hypothesis. 
C)  incorrectly rejecting the null hypothesis. 
D)  correctly rejecting the null hypothesis.

Question 7

Given the following information,  
N = 49, $\bar { x }$ = 50, s = 7
 H0:$\mu$ > 52
Ha: $\mu$< 52
 
The test statistic is

Accepted Answer

A)  2. 
B)  -2. 
C)  1. 
D)  -1. 
A)  2. 
B)  -2. 
C)  1. 
D)  -1.

Question 8

For the following hypothesis test, H0: μ ≥ 150
Ha: μ < 150
​
The test statistic

Accepted Answer

A)  must be negative. 
B)  must be positive. 
C)  can be either negative or positive. 
D)  must be a number between zero and one. 
A)  must be negative. 
B)  must be positive. 
C)  can be either negative or positive. 
D)  must be a number between zero and one.

Question 9

The critical value of t for a two-tailed test with 6 degrees of freedom using α = .05 is

Accepted Answer

A)  2.447. 
B)  1.943. 
C)  2.365. 
D)  1.985. 
A)  2.447. 
B)  1.943. 
C)  2.365. 
D)  1.985.

Question 10

Read the t statistic from the t distribution table and circle the correct answer.For a one-tailed test (upper tail), using a sample size of 18, and at the 5% level of significance, t =

Accepted Answer

A)  2.12. 
B)  -2.12. 
C)  -1.740. 
D)  1.740. 
A)  2.12. 
B)  -2.12. 
C)  -1.740. 
D)  1.740.

Question 11

In hypothesis tests about a population proportion, p0 represents the​

Accepted Answer

A)  ​hypothesized population proportion. 
B)  ​observed sample proportion. 
C)  ​observed p-value. 
D)  ​probability that H0 is correct. 
A)  ​hypothesized population proportion. 
B)  ​observed sample proportion. 
C)  ​observed p-value. 
D)  ​probability that H0 is correct.

Question 12

In a lower tail hypothesis test situation, the p-value is determined to be .2.If the sample size for this test is 51, the t statistic has a value of

Accepted Answer

A)  .849. 
B)  -.849. 
C)  1.299. 
D)  -1.299. 
A)  .849. 
B)  -.849. 
C)  1.299. 
D)  -1.299.

Question 13

A random sample of 16 students selected from the student body of a large university had an average age of 25 years and a standard deviation of 2 years.We want to determine if the average age of all the students at the university is significantly more than 24.Assume the distribution of the population of ages is normal.The p-value is between

Accepted Answer

A)  .005 to .01. 
B)  .01 to .025. 
C)  .025 to .05. 
D)  .05 to .10. 
A)  .005 to .01. 
B)  .01 to .025. 
C)  .025 to .05. 
D)  .05 to .10.

Question 14

For a given sample size in hypothesis testing,

Accepted Answer

A)  the smaller the Type I error, the smaller the Type II error will be. 
B)  the smaller the Type I error, the larger the Type II error will be. 
C)  Type II error will not be effected by Type I error. 
D)  the sum of Type I and Type II errors must equal to 1. 
A)  the smaller the Type I error, the smaller the Type II error will be. 
B)  the smaller the Type I error, the larger the Type II error will be. 
C)  Type II error will not be effected by Type I error. 
D)  the sum of Type I and Type II errors must equal to 1.

Question 15

For a two-tailed hypothesis test about  , we can use any of the following approaches except?

Accepted Answer

A)   compare the confidence interval estimate of   to the hypothesized value of   
B)   compare the p-value to the value of   
C)   compare the value of the test statistic to the critical value. 
D)   compare the level of significance to the confidence coefficient. 
A)   compare the confidence interval estimate of   to the hypothesized value of   
B)   compare the p-value to the value of   
C)   compare the value of the test statistic to the critical value. 
D)   compare the level of significance to the confidence coefficient.

Question 16

Read the z statistic from the normal distribution table and circle the correct answer.For a one-tailed test (lower tail) using α = .1020, z =

Accepted Answer

A)  -1.27. 
B)  -1.53. 
C)  -1.96. 
D)  -1.64. 
A)  -1.27. 
B)  -1.53. 
C)  -1.96. 
D)  -1.64.

Question 17

Read the z statistic from the normal distribution table and circle the correct answer.For a one-tailed test (upper tail) using α = .1230, z =

Accepted Answer

A)  1.54. 
B)  1.96. 
C)  1.645. 
D)  1.16. 
A)  1.54. 
B)  1.96. 
C)  1.645. 
D)  1.16.

Question 18

Which of the following does not need to be known in order to compute the p-value?

Accepted Answer

A)  knowledge of whether the test is one-tailed or two-tailed 
B)  the value of the test statistic 
C)  the level of significance 
D)  the probability distribution of the test statistic 
A)  knowledge of whether the test is one-tailed or two-tailed 
B)  the value of the test statistic 
C)  the level of significance 
D)  the probability distribution of the test statistic

Question 19

As a general guideline, the research hypothesis should be stated as the​

Accepted Answer

A)  ​null hypothesis. 
B)  ​alternative hypothesis. 
C)  ​tentative hypothesis. 
D)  ​hypothesis the researcher wants to disprove. 
A)  ​null hypothesis. 
B)  ​alternative hypothesis. 
C)  ​tentative hypothesis. 
D)  ​hypothesis the researcher wants to disprove.

Question 20

The level of significance is the

Accepted Answer

A)  maximum allowable probability of Type II error. 
B)  maximum allowable probability of Type I error. 
C)  same as the confidence coefficient. 
D)  same as the p-value. 
A)  maximum allowable probability of Type II error. 
B)  maximum allowable probability of Type I error. 
C)  same as the confidence coefficient. 
D)  same as the p-value.

When the null hypothesis is not rejected, it is

The probability of making a Type I error is denoted by

When the p-value is used for hypothesis testing, the null hypothesis is rejected if

An assumption made about the value of a population parameter is called a(n)

Read the z statistic from the normal distribution table and circle the correct answer.For a one-tailed test (lower tail) using α = .0630, z =

The power curve provides the probability of

Given the following information, N = 49, $\bar { x }$ = 50, s = 7 H₀: $\mu$ > 52 H_a: $\mu$ < 52 The test statistic is

For the following hypothesis test, H₀: μ ≥ 150 H_a: μ < 150 The test statistic

The critical value of t for a two-tailed test with 6 degrees of freedom using α = .05 is

Read the t statistic from the t distribution table and circle the correct answer.For a one-tailed test (upper tail), using a sample size of 18, and at the 5% level of significance, t =

In hypothesis tests about a population proportion, p₀ represents the

In a lower tail hypothesis test situation, the p-value is determined to be .2.If the sample size for this test is 51, the t statistic has a value of

For a given sample size in hypothesis testing,

For a two-tailed hypothesis test about , we can use any of the following approaches except?

Read the z statistic from the normal distribution table and circle the correct answer.For a one-tailed test (lower tail) using α = .1020, z =

Read the z statistic from the normal distribution table and circle the correct answer.For a one-tailed test (upper tail) using α = .1230, z =

Which of the following does not need to be known in order to compute the p-value?

As a general guideline, the research hypothesis should be stated as the

The level of significance is the

Data and Statistics

Descriptive Statistics: Tabulargraphical

Descriptive Statistics: Numerical

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Comparing Multiple Proportions, Test of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Filters

Exam 9: Hypothesis Tests

​When the null hypothesis is not rejected, it is​

The probability of making a Type I error is denoted by

When the p-value is used for hypothesis testing, the null hypothesis is rejected if

An assumption made about the value of a population parameter is called a(n)

Read the z statistic from the normal distribution table and circle the correct answer.For a one-tailed test (lower tail) using α = .0630, z =

The power curve provides the probability of

Given the following information, N = 49, xˉ\bar { x }xˉ = 50, s = 7 H0: μ\muμ > 52 Ha: μ\muμ < 52 The test statistic is

For the following hypothesis test, H0: μ ≥ 150 Ha: μ < 150 ​ The test statistic

The critical value of t for a two-tailed test with 6 degrees of freedom using α = .05 is

Read the t statistic from the t distribution table and circle the correct answer.For a one-tailed test (upper tail), using a sample size of 18, and at the 5% level of significance, t =

In hypothesis tests about a population proportion, p0 represents the​

In a lower tail hypothesis test situation, the p-value is determined to be .2.If the sample size for this test is 51, the t statistic has a value of

For a given sample size in hypothesis testing,

For a two-tailed hypothesis test about , we can use any of the following approaches except?

Read the z statistic from the normal distribution table and circle the correct answer.For a one-tailed test (lower tail) using α = .1020, z =

Read the z statistic from the normal distribution table and circle the correct answer.For a one-tailed test (upper tail) using α = .1230, z =

Which of the following does not need to be known in order to compute the p-value?

As a general guideline, the research hypothesis should be stated as the​

The level of significance is the

Data and Statistics

Descriptive Statistics: Tabulargraphical

Descriptive Statistics: Numerical

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Comparing Multiple Proportions, Test of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Filters

When the null hypothesis is not rejected, it is

Given the following information, N = 49, $\bar { x }$ = 50, s = 7 H₀: $\mu$ > 52 H_a: $\mu$ < 52 The test statistic is

For the following hypothesis test, H₀: μ ≥ 150 H_a: μ < 150 The test statistic

In hypothesis tests about a population proportion, p₀ represents the

As a general guideline, the research hypothesis should be stated as the