It is recommended that adults should sleep between 7 hours and 9 hours each night. In a recent National Health and Nutrition Examination Study, the sleep times for 12 randomly selected adults were obtained and their results are given below. At the 0.05 significance level, test the claim that adults do not get enough sleep. Assume that adult sleep times are normally distributed.
Scenario: It is recommended that adults should sleep between 7 hours and 9 hours each night. In a recent National Health and Nutrition Examination Study, the sleep times for 12 randomly selected adults were obtained and their results are given below. At the 0.05 significance level, test the claim that adults do not get enough sleep. Assume that adult sleep times are
x¯ | 6.833 |
s | 1.992 |
Part 3:
Compute the p-value.
Round your answer correct to three decimal places.
Answer:
Part 4:
What is your decision? Explain your reasoning.
A. Reject H0, because the p-value is greater than the significance level.
B. Reject H0, because the p-value is less than the significance level.
C. Fail to reject H0, because the p-value is greater than the significance level.
D. Fail to reject H0, because the p-value is less than the significance level.
Answer:
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