Question 1

Which of the following is NOT one of the five steps in the hypothesis testing procedure?

Accepted Answer

A) Formulate a decision rule 
B) State the null and alternate hypotheses 
C) Select a level for $\beta$ 
D) Identify the test statistic 
A) Formulate a decision rule 
B) State the null and alternate hypotheses 
C) Select a level for $\beta$ 
D) Identify the test statistic

Question 2

When testing a hypothesis,a test statistic is required to compute a p-value.

Accepted Answer

A) True 
 B)False

Question 3

If we reject the null hypothesis what can we conclude subject to the $\alpha$ risk?

Accepted Answer

A) Null hypothesis is false 
B) Alternative hypothesis is false 
C) Null hypothesis is true 
D) Both the null hypothesis and the alternative hypothesis are true 
E) Both the null hypothesis and the alternative hypothesis are false 
A) Null hypothesis is false 
B) Alternative hypothesis is false 
C) Null hypothesis is true 
D) Both the null hypothesis and the alternative hypothesis are true 
E) Both the null hypothesis and the alternative hypothesis are false

Question 4

How is the significance level related to the size of the test statistic and the probability of a Type I error?

Accepted Answer

Smaller significance levels le

Question 5

For a one-tailed hypothesis test,the critical z-value of the test statistic is -2.33.Which of the following is true about the hypothesis test?

Accepted Answer

A) $\alpha$= 0.05 for a lower-tailed test 
B) $\alpha$ = 0.01 for a lower-tailed test 
C) $\alpha$ = 0.05 for an upper-tailed test 
D) $\alpha$ = 0.01 for an upper-tailed test 
A) $\alpha$= 0.05 for a lower-tailed test 
B) $\alpha$ = 0.01 for a lower-tailed test 
C) $\alpha$ = 0.05 for an upper-tailed test 
D) $\alpha$ = 0.01 for an upper-tailed test

Question 6

A manufacturer wants to increase the shelf life of a line of cake mixes.Past records indicate that the average shelf life of the mix is 216 days.After a revised mix has been developed,a sample of nine boxes of cake mix gave these shelf lives (in days): 215,217,218,219,216,217,217,218 and 218.At the 0.025 level,has the shelf life of the cake mix increased?

Accepted Answer

A) Yes,because computed t is greater than the critical value. 
B) Yes,because computed t is less than the critical value. 
C) No,because computed t lies in the region of acceptance. 
D) No,because 217.24 is quite close to 216. 
A) Yes,because computed t is greater than the critical value. 
B) Yes,because computed t is less than the critical value. 
C) No,because computed t lies in the region of acceptance. 
D) No,because 217.24 is quite close to 216.

Question 7

If the null hypothesis is false and the researcher rejects it,then a Type II error has been committed.

Accepted Answer

A) True 
 B)False

Question 8

Test at the 0.01 level the statement that 55% of those families who plan to purchase a vacation residence in Florida want a condominium.The null hypothesis is $\pi$ = 0.55 and the alternate is   .A random sample of 400 families who planned to buy a vacation residence revealed that 228 families want a condominium.What decision should be made regarding the null hypothesis?

Accepted Answer

A) Do not reject it 
B) Reject it 
C) Cannot accept nor reject it based on the information given 
D) None of these 
A) Do not reject it 
B) Reject it 
C) Cannot accept nor reject it based on the information given 
D) None of these

Question 9

The mean weight of newborn infants at a community hospital is 6.6 pounds.A sample of seven infants is randomly selected and their weights at birth are recorded as 9.0,7.3,6.0,8.8,6.8,8.4,and 6.6 pounds.If $\alpha$ = 0.05,what is the critical t value?

Accepted Answer

A) -2.365 
B) $\pm$1.96 
C) $\pm$2.365 
D) $\pm$2.447 
E) -2.447 
A) -2.365 
B) $\pm$1.96 
C) $\pm$2.365 
D) $\pm$2.447 
E) -2.447

Question 10

If the null hypothesis is true and the researchers reject it,what error has been made? __________

Accepted Answer

The answer of If the null hypothesis is true and...

Question 11

The researcher must decide on the level of significance before formulating a decision rule and collecting sample data.

Accepted Answer

A) True 
 B)False

Question 12

The mean weight of newborn infants at a community hospital is 6.6 pounds.A sample of seven infants is randomly selected and their weights at birth are recorded as 9.0,7.3,6.0,8.8,6.8,8.4,and 6.6 pounds.What is the decision for a significant increase in the average birthrate at a 5% level of significance?

Accepted Answer

A) Fail to reject the null hypothesis and conclude the mean is 6.6 lb. 
B) Reject the null hypothesis and conclude the mean is lower than 6.6 lb. 
C) Reject the null hypothesis and conclude the mean is greater than 6.6 lb. 
D) Cannot calculate because population standard deviation is unknown. 
A) Fail to reject the null hypothesis and conclude the mean is 6.6 lb. 
B) Reject the null hypothesis and conclude the mean is lower than 6.6 lb. 
C) Reject the null hypothesis and conclude the mean is greater than 6.6 lb. 
D) Cannot calculate because population standard deviation is unknown.

Question 13

When planning an experiment,how is a significance level related to sample size?

Accepted Answer

When planning an experiment,ho

Question 14

One assumption in testing a hypothesis about a proportion is that an outcome of an experiment can be classified into two mutually exclusive categories,namely,a success or a failure.

Accepted Answer

A) True 
 B)False

Question 15

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 H0? ________________________

Accepted Answer

H<sub>0</s

Question 16

The level of significance is the risk of rejecting the null hypothesis when it is actually true.

Accepted Answer

A) True 
 B)False

Question 17

A survey indicates that among eighty people surveyed sixty or 75% prefer SOS cereal.What do the sixty people represent? ___________________

Accepted Answer

The answer of A survey indicates that among eighty people...

Question 18

What value is the dividing point separating the region of rejection from the region of non-rejection? ___________________________

Accepted Answer

The answer of What value is the dividing point separating...

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 p-value?

Accepted Answer

A) 0.3461 
B) 0.1539 
C) 0.3078 
D) 0.0100 
A) 0.3461 
B) 0.1539 
C) 0.3078 
D) 0.0100

Question 20

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 critical z-value for this test?

Accepted Answer

A) +1.96 
B) -1.96 
C) + 1.65 
D) -1.65 
A) +1.96 
B) -1.96 
C) + 1.65 
D) -1.65

Which of the following is NOT one of the five steps in the hypothesis testing procedure?

When testing a hypothesis,a test statistic is required to compute a p-value.

If we reject the null hypothesis what can we conclude subject to the $\alpha$ risk?

How is the significance level related to the size of the test statistic and the probability of a Type I error?

For a one-tailed hypothesis test,the critical z-value of the test statistic is -2.33.Which of the following is true about the hypothesis test?

If the null hypothesis is false and the researcher rejects it,then a Type II error has been committed.

The mean weight of newborn infants at a community hospital is 6.6 pounds.A sample of seven infants is randomly selected and their weights at birth are recorded as 9.0,7.3,6.0,8.8,6.8,8.4,and 6.6 pounds.If $\alpha$ = 0.05,what is the critical t value?

If the null hypothesis is true and the researchers reject it,what error has been made? __________

The researcher must decide on the level of significance before formulating a decision rule and collecting sample data.

When planning an experiment,how is a significance level related to sample size?

One assumption in testing a hypothesis about a proportion is that an outcome of an experiment can be classified into two mutually exclusive categories,namely,a success or a failure.

The level of significance is the risk of rejecting the null hypothesis when it is actually true.

A survey indicates that among eighty people surveyed sixty or 75% prefer SOS cereal.What do the sixty people represent? ___________________

What value is the dividing point separating the region of rejection from the region of non-rejection? ___________________________

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 p-value?

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

Which of the following is NOT one of the five steps in the hypothesis testing procedure?

When testing a hypothesis,a test statistic is required to compute a p-value.

If we reject the null hypothesis what can we conclude subject to the α\alphaα risk?

How is the significance level related to the size of the test statistic and the probability of a Type I error?

For a one-tailed hypothesis test,the critical z-value of the test statistic is -2.33.Which of the following is true about the hypothesis test?

If the null hypothesis is false and the researcher rejects it,then a Type II error has been committed.

The mean weight of newborn infants at a community hospital is 6.6 pounds.A sample of seven infants is randomly selected and their weights at birth are recorded as 9.0,7.3,6.0,8.8,6.8,8.4,and 6.6 pounds.If α\alphaα = 0.05,what is the critical t value?

If the null hypothesis is true and the researchers reject it,what error has been made? __________

The researcher must decide on the level of significance before formulating a decision rule and collecting sample data.

When planning an experiment,how is a significance level related to sample size?

One assumption in testing a hypothesis about a proportion is that an outcome of an experiment can be classified into two mutually exclusive categories,namely,a success or a failure.

The level of significance is the risk of rejecting the null hypothesis when it is actually true.

A survey indicates that among eighty people surveyed sixty or 75% prefer SOS cereal.What do the sixty people represent? ___________________

What value is the dividing point separating the region of rejection from the region of non-rejection? ___________________________

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 p-value?

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

If we reject the null hypothesis what can we conclude subject to the $\alpha$ risk?

The mean weight of newborn infants at a community hospital is 6.6 pounds.A sample of seven infants is randomly selected and their weights at birth are recorded as 9.0,7.3,6.0,8.8,6.8,8.4,and 6.6 pounds.If $\alpha$ = 0.05,what is the critical t value?