Question 1

For a one-tailed test of hypothesis,the area of rejection is only in one tail of the curve.

Accepted Answer

A) True 
 B)False

Question 2

It is claimed that in a bushel of peaches less than ten percent are defective.A sample of 400 peaches is examined and 50 are found to be defective.What is the z-statistic?

Accepted Answer

A) 0.025 
B) 0.278 
C) -1.65 
D) 1.67 
A) 0.025 
B) 0.278 
C) -1.65 
D) 1.67

Question 3

When testing population proportions,the z statistic can be used when n $\pi$ and n(1 -  $\pi$)are greater than five.

Accepted Answer

A) True 
 B)False

Question 4

The claim that "40% of those persons who retired from an industrial job before the age of 60 would return to work if a suitable job was available," is to be investigated at the 0.02 level of risk.If 74 out of the 200 workers sampled said they would return to work,what is our decision?

Accepted Answer

A) Do not reject the null hypothesis because -0.866 lies in the region between 0 and -2.33 
B) Do not reject the null hypothesis because -0.866 lies in the region between 0 and -2.58 
C) Reject the null hypothesis because 37% is less than 40% 
D) Do not reject the null hypothesis because 37% lies in the area between 0% and 40% 
A) Do not reject the null hypothesis because -0.866 lies in the region between 0 and -2.33 
B) Do not reject the null hypothesis because -0.866 lies in the region between 0 and -2.58 
C) Reject the null hypothesis because 37% is less than 40% 
D) Do not reject the null hypothesis because 37% lies in the area between 0% and 40%

Question 5

If the null hypothesis is false and the researchers do not reject it,then a Type I error has been made.

Accepted Answer

A) True 
 B)False

Question 6

When the p-value is 0.001 or less,there is extremely strong evidence that the null hypothesis is true.

Accepted Answer

A) True 
 B)False

Question 7

The alternate hypothesis can be accepted only if the null hypothesis is shown to be __________.

Accepted Answer

The answer of The alternate hypothesis can be accepted only...

Question 8

What is the test of hypothesis if no direction is specified under the alternate hypothesis? _____________

Accepted Answer

The answer of What is the test of hypothesis if...

Question 9

The region or area of rejection defines the location of all values that are so large or so small that the probability of their occurrence under a true null hypothesis is rather remote.

Accepted Answer

A) True 
 B)False

Question 10

A restaurant that bills its house account monthly is concerned that the average monthly bill exceeds $200 per account.A random sample of twelve accounts is selected,resulting in a sample mean of $220 and a standard deviation of $12.The t-test is to be conducted at the 5% level of significance.What is our decision? _______________

Accepted Answer

The answer of A restaurant that bills its house account...

Question 11

If the critical values of the test statistic z are $\pm$1.96,they are the dividing points between the areas of rejection and non-rejection.

Accepted Answer

A) True 
 B)False

Question 12

The average cost of tuition,room and board at small private liberal arts colleges is reported to be $8,500 per term,but a financial administrator believes that the average cost is higher.A study conducted using 350 small liberal arts colleges showed that the average cost per term is $8,745 with a standard deviation of $1,200.Let = 0.05.What is the test statistic for this test?

Accepted Answer

A) $\pm$3.82 
B) 0.204 
C) -3.82 
D) +3.82 
A) $\pm$3.82 
B) 0.204 
C) -3.82 
D) +3.82

Question 13

A manufacturer claims that less than 1% of all his products do not meet the minimum government standards.A survey of 500 products revealed ten did not meet the standard.What is the null hypothesis? ____________________

Accepted Answer

H<sub>0</s

Question 14

The fifth and final step in testing a hypothesis is taking a sample and,based on the decision rule,deciding if the null hypothesis should be rejected.

Accepted Answer

A) True 
 B)False

Question 15

How is a significance level determined and how is it related to Type I error?

Accepted Answer

The researcher selects the sig

Question 16

The null hypothesis is rejected when a p-value is greater than a stated significance level.

Accepted Answer

A) True 
 B)False

Question 17

The standard normal distribution is the appropriate distribution when testing a hypothesis about a population proportion.

Accepted Answer

A) True 
 B)False

Question 18

If the null hypothesis is true and the researchers do not reject it,then a correct decision has been made.

Accepted Answer

A) True 
 B)False

Question 19

Based on the Nielsen ratings,the local CBS affiliate claims its 11:00 PM newscast reaches 41% of the viewing audience in the area.In a survey of 100 viewers,36% indicated that they watch the late evening news on this local CBS station.What is the z-statistic?

Accepted Answer

A) 1.02 
B) 1.22 
C) -1.02 
D) -1.22 
A) 1.02 
B) 1.22 
C) -1.02 
D) -1.22

Question 20

For a one-tailed null hypothesis and a test statistic,Z = 1.96,the p-value is 0.025.

Accepted Answer

A) True 
 B)False

For a one-tailed test of hypothesis,the area of rejection is only in one tail of the curve.

It is claimed that in a bushel of peaches less than ten percent are defective.A sample of 400 peaches is examined and 50 are found to be defective.What is the z-statistic?

When testing population proportions,the z statistic can be used when n $\pi$ and n(1 - $\pi$ )are greater than five.

The claim that "40% of those persons who retired from an industrial job before the age of 60 would return to work if a suitable job was available," is to be investigated at the 0.02 level of risk.If 74 out of the 200 workers sampled said they would return to work,what is our decision?

If the null hypothesis is false and the researchers do not reject it,then a Type I error has been made.

When the p-value is 0.001 or less,there is extremely strong evidence that the null hypothesis is true.

The alternate hypothesis can be accepted only if the null hypothesis is shown to be __________.

What is the test of hypothesis if no direction is specified under the alternate hypothesis? _____________

The region or area of rejection defines the location of all values that are so large or so small that the probability of their occurrence under a true null hypothesis is rather remote.

If the critical values of the test statistic z are $\pm$ 1.96,they are the dividing points between the areas of rejection and non-rejection.

A manufacturer claims that less than 1% of all his products do not meet the minimum government standards.A survey of 500 products revealed ten did not meet the standard.What is the null hypothesis? ____________________

The fifth and final step in testing a hypothesis is taking a sample and,based on the decision rule,deciding if the null hypothesis should be rejected.

How is a significance level determined and how is it related to Type I error?

The null hypothesis is rejected when a p-value is greater than a stated significance level.

The standard normal distribution is the appropriate distribution when testing a hypothesis about a population proportion.

If the null hypothesis is true and the researchers do not reject it,then a correct decision has been made.

Based on the Nielsen ratings,the local CBS affiliate claims its 11:00 PM newscast reaches 41% of the viewing audience in the area.In a survey of 100 viewers,36% indicated that they watch the late evening news on this local CBS station.What is the z-statistic?

For a one-tailed null hypothesis and a test statistic,Z = 1.96,the p-value is 0.025.

What Is Statistics

Describing Data: Frequency Distributions and Graphic Presentations

Describing Data: Numerical Measures

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

Two-Sample Tests of Hypothesis

Analysis of Variance

Linear Regression and Correlation

Multiple Regression and Correlation Analysis

Chi-Square Applications

Filters

Exam 10: One-Sample Tests of Hypothesis

For a one-tailed test of hypothesis,the area of rejection is only in one tail of the curve.

It is claimed that in a bushel of peaches less than ten percent are defective.A sample of 400 peaches is examined and 50 are found to be defective.What is the z-statistic?

When testing population proportions,the z statistic can be used when n π\piπ and n(1 - π\piπ )are greater than five.

The claim that "40% of those persons who retired from an industrial job before the age of 60 would return to work if a suitable job was available," is to be investigated at the 0.02 level of risk.If 74 out of the 200 workers sampled said they would return to work,what is our decision?

If the null hypothesis is false and the researchers do not reject it,then a Type I error has been made.

When the p-value is 0.001 or less,there is extremely strong evidence that the null hypothesis is true.

The alternate hypothesis can be accepted only if the null hypothesis is shown to be __________.

What is the test of hypothesis if no direction is specified under the alternate hypothesis? _____________

The region or area of rejection defines the location of all values that are so large or so small that the probability of their occurrence under a true null hypothesis is rather remote.

If the critical values of the test statistic z are ±\pm± 1.96,they are the dividing points between the areas of rejection and non-rejection.

A manufacturer claims that less than 1% of all his products do not meet the minimum government standards.A survey of 500 products revealed ten did not meet the standard.What is the null hypothesis? ____________________

The fifth and final step in testing a hypothesis is taking a sample and,based on the decision rule,deciding if the null hypothesis should be rejected.

How is a significance level determined and how is it related to Type I error?

The null hypothesis is rejected when a p-value is greater than a stated significance level.

The standard normal distribution is the appropriate distribution when testing a hypothesis about a population proportion.

If the null hypothesis is true and the researchers do not reject it,then a correct decision has been made.

Based on the Nielsen ratings,the local CBS affiliate claims its 11:00 PM newscast reaches 41% of the viewing audience in the area.In a survey of 100 viewers,36% indicated that they watch the late evening news on this local CBS station.What is the z-statistic?

For a one-tailed null hypothesis and a test statistic,Z = 1.96,the p-value is 0.025.

What Is Statistics

Describing Data: Frequency Distributions and Graphic Presentations

Describing Data: Numerical Measures

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

Two-Sample Tests of Hypothesis

Analysis of Variance

Linear Regression and Correlation

Multiple Regression and Correlation Analysis

Chi-Square Applications

Filters

When testing population proportions,the z statistic can be used when n $\pi$ and n(1 - $\pi$ )are greater than five.

If the critical values of the test statistic z are $\pm$ 1.96,they are the dividing points between the areas of rejection and non-rejection.