Question 26(CO7) A travel analyst claims that the mean room rates at a three-star hotel in Chicago is

greater than $152. In a random sample of 36 three-star hotel rooms in Chicago, the mean room rate is $165 with a standard deviation of $41. At α=0.10, can you support the analyst’s claim using the p-value?

A)Claim is the alternative, reject the null as p-value (0.029) is less than alpha (0.10), and can support the claim

B)Claim is the null, fail to reject the null as p-value (0.029) is less than alpha (0.10), and cannot support the claim

C)Claim is the alternative, fail to reject the null as p-value (0.029) is less than alpha (0.10), and can support the claim

D)Claim is the null, reject the null as p-value (0.029) is less than alpha (0.10), and cannot support the claim

Question 27

(CO7) A car company claims that the mean gas mileage for its luxury sedan is at least 24 miles per gallon. A random sample of 7 cars has a mean gas mileage of 23 miles per gallon and a standard deviation of 1.2 miles per gallon. At α=0.05, can you support the company’s claim?

A)Yes, since the test statistic is not in the rejection region defined by the critical value, the null is not rejected. The claim is the null, so is supported

B)Yes, since the test statistic is not in the rejection region defined by the critical value, the null is not rejected. The claim is the null, so is supported

C)No, since the test statistic is not in the rejection region defined by the critical value, the null is not rejected. The claim is the null, so is supported

D)No, since the test statistic is in the rejection region defined by the critical value, the null is rejected. The claim is the null, so is not supported

Question 28

CO7) A state Department of Transportation claims that the mean wait time for various services at its different location is more than 6 minutes. A random sample of 16 services at different locations has a mean wait time of 9.5 minutes and a standard deviation of 7.6 minutes. At α=0.01, can the department’s claim be supported?

A)Yes, since p of 0.043 is greater than 0.01, fail to reject the null. Claim is null, so is supported

B)No, since p of 0.043 is greater than 0.01, fail to reject the null. Claim is alternative, so is not supported

C)Yes, since p of 0.043 is less than 0.09, reject the null. Claim is alternative, so is supported

D)No, since p of 0.043 is greater than 0.01, reject the null. Claim is null, so is not supported

Question 29

(CO7) A used car dealer says that the mean price of a three-year-old sport utility vehicle in good condition is $18,000. A random sample of 20 such vehicles has a mean price of $18,450 and a standard deviation of $1140. At α=0.08, can the dealer’s claim be supported?

A)Yes, since the test statistic of 1.77 is not in the rejection region defined by the critical value of 1.85, the null is not rejected. The claim is the null, so is supported

B)No, since the test statistic of 1.77 is in the rejection region defined by the critical value of 1.85, the null is rejected. The claim is the null, so is not supported

C)Yes, since the test statistic of 1.77 is in the rejection region defined by the critical value of 1.46, the null is rejected. The claim is the null, so is supported

D)No, since the test statistic of 1.77 is close to the critical value of 1.85, the null is not rejected. The claim is the null, so is supported

Question 30

(CO7) A researcher wants to determine if daily talks together strengthen a marriage. One group of wives and one group of husbands are selected and have daily talks. After 2 weeks, all are asked if they felt their marriage was stronger based on the talks and the results of the two groups are compared. To be a valid matched pair test, what should the researcher consider in creating the two groups?

A)That the husbands and wives selected were married to each other

B)That the wives group was positive on marriage before the walks

C)That all husbands and wives in the test had been married about the same amount of time

D)That the both groups were positive on marriage before the walks

 

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