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Justine is an analyst for a sleep study center in a major city. She is looking to test the claim that the population mean amount of time an adult in the city sleeps per day is 7.2 hours. She believes that the population mean is more than 7.2 hours. To test this claim, she selects a random sample of 63 adults from the city and finds the sample mean to be 7.52 hours with a sample standard deviation of 1 . 14 hours. The test statistic t for a hypothesis test of Ho : μ = 7.2 versus Ha : μ 〉 7.2 is computed as t 2.23, which has 62 degrees of freedom. If 0.01 〈p-value< 0.025 and the level of significance is α = 0.10, which of the following statements are accurate for this hypothesis test to evaluate the claim that the true population mean amount of time an adult in the city sleeps per day is greater than 7.2 hours? Select all that apply: Fail to reject the null hypothesis that the true population mean amount of time an adult in the city sleeps per day is equal to 7.2 hours. Reject the null hypothesis that the true population mean amount of time an adult in the city sleeps per day is equal to 7.2 hours. O There is enough evidence at the α-0. 10 level of significance to support the claim that the true population mean amount of time an adult in the city sleeps per day is greater than 7.2 hours. There is not enough evidence at the a 0.10 level of significance to suggest that the true population mean amount of time an adult in the city sleeps per day is not equal to 7.2 hours.

Justine is an analyst for a sleep study center in a major city. She is looking to test the claim that the population mean amount of time an adult in the city sleeps per day is 7.2 hours. She believes that the population mean is more than 7.2 hours. To test this claim, she selects a random sample of 63 adults from the city and finds the sample mean to be 7.52 hours with a sample standard deviation of 1 . 14 hours. The test statistic t for a hypothesis test of Ho : μ = 7.2 versus Ha : μ 〉 7.2 is computed as t 2.23, which has 62 degrees of freedom. If 0.01 〈p-value< 0.025 and the level of significance is α = 0.10, which of the following statements are accurate for this hypothesis test to evaluate the claim that the true population mean amount of time an adult in the city sleeps per day is greater than 7.2 hours? Select all that apply: Fail to reject the null hypothesis that the true population mean amount of time an adult in the city sleeps per day is equal to 7.2 hours. Reject the null hypothesis that the true population mean amount of time an adult in the city sleeps per day is equal to 7.2 hours. O There is enough evidence at the α-0. 10 level of significance to support the claim that the true population mean amount of time an adult in the city sleeps per day is greater than 7.2 hours. There is not enough evidence at the a 0.10 level of significance to suggest that the true population mean amount of time an adult in the city sleeps per day is not equal to 7.2 hours.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Justine is an analyst for a sleep study center in a major city. She is looking to test the claim that the population mean amount of time an adult in the city sleeps per day is 7.2 hours. She believes that the population mean is more than 7.2 hours. To test this claim, she selects a random sample of 63 adults from the city and finds the sample mean to be 7.52 hours with a sample standard deviation of 1 . 14 hours. The test statistic t for a hypothesis test of Ho : μ = 7.2 versus Ha : μ 〉 7.2 is computed as t 2.23, which has 62 degrees of freedom. If 0.01 〈p-value< 0.025 and the level of significance is α = 0.10, which of the following statements are accurate for this hypothesis test to evaluate the claim that the true population mean amount of time an adult in the city sleeps per day is greater than 7.2 hours? Select all that apply: Fail to reject the null hypothesis that the true population mean amount of time an adult in the city sleeps per day is equal to 7.2 hours. Reject the null hypothesis that the true population mean amount of time an adult in the city sleeps per day is equal to 7.2 hours. O There is enough evidence at the α-0. 10 level of significance to support the claim that the true population mean amount of time an adult in the city sleeps per day is greater than 7.2 hours. There is not enough evidence at the a 0.10 level of significance to suggest that the true population mean amount of time an adult in the city sleeps per day is not equal to 7.2 hours.
Transcribed Image Text:Justine is an analyst for a sleep study center in a major city. She is looking to test the claim that the population mean amount of time an adult in the city sleeps per day is 7.2 hours. She believes that the population mean is more than 7.2 hours. To test this claim, she selects a random sample of 63 adults from the city and finds the sample mean to be 7.52 hours with a sample standard deviation of 1 . 14 hours. The test statistic t for a hypothesis test of Ho : μ = 7.2 versus Ha : μ 〉 7.2 is computed as t 2.23, which has 62 degrees of freedom. If 0.01 〈p-value< 0.025 and the level of significance is α = 0.10, which of the following statements are accurate for this hypothesis test to evaluate the claim that the true population mean amount of time an adult in the city sleeps per day is greater than 7.2 hours? Select all that apply: Fail to reject the null hypothesis that the true population mean amount of time an adult in the city sleeps per day is equal to 7.2 hours. Reject the null hypothesis that the true population mean amount of time an adult in the city sleeps per day is equal to 7.2 hours. O There is enough evidence at the α-0. 10 level of significance to support the claim that the true population mean amount of time an adult in the city sleeps per day is greater than 7.2 hours. There is not enough evidence at the a 0.10 level of significance to suggest that the true population mean amount of time an adult in the city sleeps per day is not equal to 7.2 hours.
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