Question

According to a recent survey, Americans get a mean of 7 hours of sleep per night. A random sample of 50 students at West Virginia University revealed the mean length of sleep last night was 6 hours and 48 minutes (6.8 hours). The standard deviation of the sample was 0.9 hour. At the 5% level of significance, it is reasonable to conclude students at West Virginia sleep less than the typical American? Compute the p-value

Answer 1

p-value = P(z < -1.5713) = 0.0581

Conclusion: Since the p-value is greater than 5%,

fail to reject.

The test results to not support the claim

Explanation: