A Company Decided to Test the Hypothesis That the Average

Multiple Choice

A company decided to test the hypothesis that the average time a company's employees are spending to check their private e-mails at work is more than 6 minutes.A random sample of 40 employees were selected and they averaged 6.6 minutes.It is believed that the population standard deviation is 1.7 minutes.The α is set to 0.05.The critical value for this hypothesis test would be ______.

A) 6.0
B) 7.4
C) 6.4
D) 7.9