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Question 10

2pts

(CO 5) A manufacturer claims that their calculators are 6.800 inches long. A random sample of 39 of their calculators finds they have a mean of 6.812 inches with a standard deviation of 0.03 inches. At =0.08, can you support the manufacturer's claim using the p value?

Group of answer choices

Claim is the alternative, fail to reject the null and support claim as p-value (0.012) is less than alpha (0.08)

Claim is the null, fail to reject the null and support claim as p-value (0.006) is greater than alpha (0.08)

Claim is the alternative, reject the null and cannot support claim as p-value (0.006) is less than alpha (0.08)

Claim is the null, reject the null and cannot support claim as p-value (0.012) is less than alpha (0.08)

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Question 11

2pts

(CO 5) 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 $160 with a population standard deviation of $41. At =0.10, can you support the analyst's claim using the p-value?

Group of answer choices

Claim is the alternative, reject the null as p-value (0.121) is not less than alpha (0.10), and can support the claim

Claim is the null, fail to reject the null as p-value (0.121) is not less than alpha (0.10), and cannot support the claim

Claim is the alternative, fail to reject the null as p-value (0.121) is not less than alpha (0.10), and cannot support the claim

Claim is the null, reject the null as p-value (0.121) is not less than alpha (0.10), and cannot support the claim

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Question 12

2pts

(CO 5) 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 =0.05, can you support the company's claim assuming the population is normally distributed?

Group of answer choices

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

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

Yes, 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

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

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Question 13

2pts

(CO 5) 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 7.3 minutes. At =0.05, can the department's claim be supported assuming the population is normally distributed?

Group of answer choices

Yes, since p of 0.037 is less than 0.05, reject the null. Claim is alternative, so is supported

No, since p of 0.037 is less than 0.05, reject the null. Claim is null, so is not supported

Yes, since p of 0.037 is less than 0.05, fail to reject the null. Claim is null, so is supported

No, since p of 0.037 is less than 0.05, fail to reject the null. Claim is alternative, so is not supported

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Question 14

2pts

(CO 5) 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 $1860. At =0.08, can the dealer's claim be supported assuming the population is normally distributed?

Group of answer choices

Yes, since the test statistic of 1.08 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

No, since the test statistic of 1.08 is close to the critical value of 1.24, the null is not rejected. The claim is the null, so is supported

Yes, since the test statistic of 1.08 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

No, since the test statistic of 1.08 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

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Question 15

2pts

(CO 5) A researcher wants to determine if lead levels are different between the top of a glass of water and the bottom of a glass of water. Many samples of water are taken. From half, the lead level at the top is measured and from half, the lead level at the bottom is measured. Would this be a valid matched pair test?

Group of answer choices

Yes, as long as they are all from the same faucet

No, as the lead levels cannot be accurately measured

Yes, as long as there are an equal number of glasses in each group

No, as the measurements of top and bottom should be from the same glass

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Question 16

2pts

(CO 5) Assuming the population is normally distributed, test the claim that the mean is more than 24 using an of 0.05.The sample statistics are a mean of 24.9, standard deviation of 2.11, and an n of 9.

Group of answer choices

The data support the claim, as the null was not rejected and the claim is the null.

The data do not support the claim, as the null was not rejected and the claim is the alternative.

The data support the claim, as the null was rejected and the claim is the alternative.

The data do not support the claim, as the null was rejected and the claim is the alternative.

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Question 17

2pts

(CO 5)A company claims that the hold times for customer service averages at most 10 minutes.A random sample of 24 hold times has a mean of 11.2 minutes with a standard deviation of 5.2 minutes.Is there enough evidence to support the claim at = 0.05? Assume the population is normally distributed.

Group of answer choices

Yes, since p of 0.135 is less than 0.05, reject the null. Claim is null, so is supported

No, since p of 0.135 is greater than 0.05, fail to reject the null. Claim is alternative, so is not supported

No, since p of 0.135 is greater than 0.05, reject the null. Claim is null, so is not supported

Yes, since p of 0.135 is greater than 0.05, fail to reject the null. Claim is null, so is supported

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Question 18

2pts

(CO 5) A coach claims that all players can run more than 1.5 miles.A random sample of 17 players finds that they can run an average of 1.7 miles with a standard deviation of 0.4 miles.Is there enough evidence to support the claim at of 0.01? Assume the population is normally distributed.

Group of answer choices

Yes, since p of 0.028 is greater than 0.01, reject the null. Claim is alternative, so is supported

Yes, since p of 0.028 is less than 0.01, reject the null. Claim is null, so is supported

No, since p of 0.028 is less than 0.01, reject the null. Claim is alternative, so is not supported

No, since p of 0.028 is greater than 0.01, fail to reject the null. Claim is alternative, so is not supported