Question 1

More evidence against H0 is indicated by​

Accepted Answer

A)  ​lower levels of significance. 
B)  ​smaller p-values. 
C)  ​smaller critical values. 
D)  lower probabilities for the power of the test. 
A)  ​lower levels of significance. 
B)  ​smaller p-values. 
C)  ​smaller critical values. 
D)  lower probabilities for the power of the test.

Question 2

In the past, 75% of the tourists who visited Chattanooga went to see Rock City.The management of Rock City recently undertook an extensive promotional campaign.They are interested in determining whether the promotional campaign actually increased the proportion of tourists visiting Rock City.The correct set of hypotheses is

Accepted Answer

A)  H0: p > .75 Ha: p $\leq$ .75. 
B)  H0: p a: p $\geq$ .75. 
C)  H0: p $\geq$ .75 Ha: p 0: p $\leq$ .75 Ha: p > .75. 
A)  H0: p > .75 Ha: p $\leq$ .75. 
B)  H0: p a: p $\geq$ .75. 
C)  H0: p $\geq$ .75 Ha: p 0: p $\leq$ .75 Ha: p > .75.

Question 3

The probability of making a Type II 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 4

In a two-tailed hypothesis test situation, the test statistic is determined to be t = -2.692.The sample size has been 45.The p-value for this test is

Accepted Answer

A)  -.005. 
B)  +.005. 
C)  -.01. 
D)  +.01. 
A)  -.005. 
B)  +.005. 
C)  -.01. 
D)  +.01.

Question 5

For a lower tail hypothesis test with a sample size of 10 and a .10 level of significance, the critical value of the test statistic t is

Accepted Answer

A)  ​-1.372. 
B)  ​-1.383. 
C)  ​-1.812. 
D)  ​-1.833. 
A)  ​-1.372. 
B)  ​-1.383. 
C)  ​-1.812. 
D)  ​-1.833.

Question 6

For a two-tailed hypothesis test with a sample size of 20 and a .05 level of significance, the critical values of the test statistic t are ​

Accepted Answer

A)  -1.725 and ​1.725. 
B)  ​-1.729 and 1.729. 
C)  -​2.086 and 2.086. 
D)  ​-2.093 and 2.093. 
A)  -1.725 and ​1.725. 
B)  ​-1.729 and 1.729. 
C)  -​2.086 and 2.086. 
D)  ​-2.093 and 2.093.

Question 7

The practice of concluding "do not reject H0" is preferred over "accept H0" when we​

Accepted Answer

A)  ​are conducting a one-tailed test. 
B)  ​are testing the validity of a claim. 
C)  ​have an insufficient sample size. 
D)  ​have not controlled for the Type II error. 
A)  ​are conducting a one-tailed test. 
B)  ​are testing the validity of a claim. 
C)  ​have an insufficient sample size. 
D)  ​have not controlled for the Type II error.

Question 8

The error of rejecting a true null hypothesis is

Accepted Answer

A)  a Type I error. 
B)  a Type II error. 
C)  always negligible in hypothesis testing. 
D)  never committed in hypothesis testing. 
A)  a Type I error. 
B)  a Type II error. 
C)  always negligible in hypothesis testing. 
D)  never committed in hypothesis testing.

Question 9

For a two-tailed test, the p-value is the probability of obtaining a value for the test statistic as

Accepted Answer

A)  likely as that provided by the sample. 
B)  unlikely as that provided by the sample. 
C)  likely as that provided by the population. 
D)  unlikely as that provided by the population. 
A)  likely as that provided by the sample. 
B)  unlikely as that provided by the sample. 
C)  likely as that provided by the population. 
D)  unlikely as that provided by the population.

Question 10

If the level of significance of a hypothesis test is raised from .01 to .05, the probability of a Type II error

Accepted Answer

A)  will also increase from .01 to .05. 
B)  will not change. 
C)  will decrease. 
D)  will increase. 
A)  will also increase from .01 to .05. 
B)  will not change. 
C)  will decrease. 
D)  will increase.

Question 11

In hypothesis testing, the tentative assumption about the population parameter is

Accepted Answer

A)  the alternative hypothesis. 
B)  the null hypothesis. 
C)  either the null or the alternative. 
D)  neither the null nor the alternative. 
A)  the alternative hypothesis. 
B)  the null hypothesis. 
C)  either the null or the alternative. 
D)  neither the null nor the alternative.

Question 12

The academic planner of a university thinks that at least 35% of the entire student body attends summer school.The correct set of hypotheses to test his belief is

Accepted Answer

A)  H0: p a: p $\geq$ .35. 
B)  H0: p $\leq$ .35 Ha: p > .35. 
C)  H0: p $\geq$ .35 Ha: p 0: p > .35 Ha: p $\leq$ .35. 
A)  H0: p a: p $\geq$ .35. 
B)  H0: p $\leq$ .35 Ha: p > .35. 
C)  H0: p $\geq$ .35 Ha: p 0: p > .35 Ha: p $\leq$ .35.

Question 13

A Type II error is committed when

Accepted Answer

A)  a true alternative hypothesis is mistakenly rejected. 
B)  a true null hypothesis is mistakenly rejected. 
C)  the true null hypothesis is correctly rejected. 
D)  the true alternative hypothesis is correctly rejected. 
A)  a true alternative hypothesis is mistakenly rejected. 
B)  a true null hypothesis is mistakenly rejected. 
C)  the true null hypothesis is correctly rejected. 
D)  the true alternative hypothesis is correctly rejected.

Question 14

A student believes that the average grade on the final examination in statistics is at least 85.She plans on taking a sample to test her belief.The correct set of hypotheses is

Accepted Answer

A)  H0: $\mu$ a: $\mu$ $\geq$ 85. 
B)  H0: $\mu$ $\leq$ 85 Ha: $\mu$ > 85. 
C)  H0: $\mu$ $\geq$ 85 Ha: $\mu$ 0: $\mu$ > 85 Ha: $\mu$ $\leq$ 85. 
A)  H0: $\mu$ a: $\mu$ $\geq$ 85. 
B)  H0: $\mu$ $\leq$ 85 Ha: $\mu$ > 85. 
C)  H0: $\mu$ $\geq$ 85 Ha: $\mu$ 0: $\mu$ > 85 Ha: $\mu$ $\leq$ 85.

Question 15

If the null hypothesis is rejected at the .05 level of significance, it will

Accepted Answer

A)  always not be rejected at the .10 level of significance. 
B)  always be rejected at the .10 level of significance. 
C)  sometimes be rejected at the .10 level of significance. 
D)  sometimes not be rejected at the .10 level of significance. 
A)  always not be rejected at the .10 level of significance. 
B)  always be rejected at the .10 level of significance. 
C)  sometimes be rejected at the .10 level of significance. 
D)  sometimes not be rejected at the .10 level of significance.

Question 16

Your investment executive claims that the average yearly rate of return on the stocks she recommends is at least 10.0%.You plan on taking a sample to test her claim.The correct set of hypotheses is

Accepted Answer

A) H0: $\mu$ a: $\mu$$\geq$ 10.0%. B) H0: $\mu$ $\leq$ 10.0% Ha: $\mu$ > 10.0%. C) H0: $\mu$> 10.0% Ha: $\mu$$\leq$ 10.0%. D) H0: $\mu$ $\geq$ 10.0% Ha: $\mu$ < 10.0%. A) H0: $\mu$ a: $\mu$$\geq$ 10.0%. B) H0: $\mu$ $\leq$ 10.0% Ha: $\mu$ > 10.0%. C) H0: $\mu$> 10.0% Ha: $\mu$$\leq$ 10.0%. D) H0: $\mu$ $\geq$ 10.0% Ha: $\mu$ < 10.0%.

Question 17

The probability of committing a Type I error when the null hypothesis is true as an equality is

Accepted Answer

A)  the confidence level. 
B)  β. 
C)  greater than 1. 
D)  the level of significance. 
A)  the confidence level. 
B)  β. 
C)  greater than 1. 
D)  the level of significance.

Question 18

The average monthly rent for one-bedroom apartments in Chattanooga has been $700.Because of the downturn in the real estate market, it is believed that there has been a decrease in the average rental.The correct hypotheses to be tested are

Accepted Answer

A)  H0: μ ≥ 700 Ha: μ 0: μ = 700 Ha: μ ≠ 700. 
C)  H0: μ > 700 Ha: μ ≤ 700. 
D)  H0: μ a: μ ≥ 700. 
A)  H0: μ ≥ 700 Ha: μ 0: μ = 700 Ha: μ ≠ 700. 
C)  H0: μ > 700 Ha: μ ≤ 700. 
D)  H0: μ a: μ ≥ 700.

Question 19

If the null hypothesis is rejected at the 5% level of significance, it

Accepted Answer

A)  will always be rejected at the 1% level. 
B)  will always not be rejected at the 1% level. 
C)  will never be tested at the 1% level. 
D)  may be rejected or not rejected at the 1% level. 
A)  will always be rejected at the 1% level. 
B)  will always not be rejected at the 1% level. 
C)  will never be tested at the 1% level. 
D)  may be rejected or not rejected at the 1% level.

Question 20

A random sample of 100 people was taken.Eighty-five of the people in the sample favored Candidate A.We are interested in determining whether or not the proportion of the population in favor of Candidate A is significantly more than 80%.The test statistic is

Accepted Answer

A)  .80. 
B)  .05. 
C)  1.25. 
D)  2.00. 
A)  .80. 
B)  .05. 
C)  1.25. 
D)  2.00.

More evidence against H₀ is indicated by

The probability of making a Type II error is denoted by

In a two-tailed hypothesis test situation, the test statistic is determined to be t = -2.692.The sample size has been 45.The p-value for this test is

For a lower tail hypothesis test with a sample size of 10 and a .10 level of significance, the critical value of the test statistic t is

For a two-tailed hypothesis test with a sample size of 20 and a .05 level of significance, the critical values of the test statistic t are

The practice of concluding "do not reject H₀" is preferred over "accept H₀" when we

The error of rejecting a true null hypothesis is

For a two-tailed test, the p-value is the probability of obtaining a value for the test statistic as

If the level of significance of a hypothesis test is raised from .01 to .05, the probability of a Type II error

In hypothesis testing, the tentative assumption about the population parameter is

The academic planner of a university thinks that at least 35% of the entire student body attends summer school.The correct set of hypotheses to test his belief is

A Type II error is committed when

A student believes that the average grade on the final examination in statistics is at least 85.She plans on taking a sample to test her belief.The correct set of hypotheses is

If the null hypothesis is rejected at the .05 level of significance, it will

Your investment executive claims that the average yearly rate of return on the stocks she recommends is at least 10.0%.You plan on taking a sample to test her claim.The correct set of hypotheses is

The probability of committing a Type I error when the null hypothesis is true as an equality is

The average monthly rent for one-bedroom apartments in Chattanooga has been $700.Because of the downturn in the real estate market, it is believed that there has been a decrease in the average rental.The correct hypotheses to be tested are

If the null hypothesis is rejected at the 5% level of significance, it

A random sample of 100 people was taken.Eighty-five of the people in the sample favored Candidate A.We are interested in determining whether or not the proportion of the population in favor of Candidate A is significantly more than 80%.The test statistic is

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

More evidence against H0 is indicated by​

The probability of making a Type II error is denoted by

In a two-tailed hypothesis test situation, the test statistic is determined to be t = -2.692.The sample size has been 45.The p-value for this test is

For a lower tail hypothesis test with a sample size of 10 and a .10 level of significance, the critical value of the test statistic t is

For a two-tailed hypothesis test with a sample size of 20 and a .05 level of significance, the critical values of the test statistic t are ​

The practice of concluding "do not reject H0" is preferred over "accept H0" when we​

The error of rejecting a true null hypothesis is

For a two-tailed test, the p-value is the probability of obtaining a value for the test statistic as

If the level of significance of a hypothesis test is raised from .01 to .05, the probability of a Type II error

In hypothesis testing, the tentative assumption about the population parameter is

The academic planner of a university thinks that at least 35% of the entire student body attends summer school.The correct set of hypotheses to test his belief is

A Type II error is committed when

A student believes that the average grade on the final examination in statistics is at least 85.She plans on taking a sample to test her belief.The correct set of hypotheses is

If the null hypothesis is rejected at the .05 level of significance, it will

Your investment executive claims that the average yearly rate of return on the stocks she recommends is at least 10.0%.You plan on taking a sample to test her claim.The correct set of hypotheses is

The probability of committing a Type I error when the null hypothesis is true as an equality is

The average monthly rent for one-bedroom apartments in Chattanooga has been $700.Because of the downturn in the real estate market, it is believed that there has been a decrease in the average rental.The correct hypotheses to be tested are

If the null hypothesis is rejected at the 5% level of significance, it

A random sample of 100 people was taken.Eighty-five of the people in the sample favored Candidate A.We are interested in determining whether or not the proportion of the population in favor of Candidate A is significantly more than 80%.The test statistic is

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

More evidence against H₀ is indicated by

For a two-tailed hypothesis test with a sample size of 20 and a .05 level of significance, the critical values of the test statistic t are

The practice of concluding "do not reject H₀" is preferred over "accept H₀" when we