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Question 9:


A professional employee in a large

corporation receives an average of  e-mails per day. Most of these e-mails are from other employees in the company. Because of the large number of e-mails, employees find themselves distracted and are unable to concentrate when they return to their tasks. In an effort to reduce distraction caused by such interruptions, one company established a priority list that all employees were to use before sending an e-mail. One month after the new priority list was put into place, a random sample of 31 employees showed that they were receiving an average of  e-mails per day. The computer server through which the e-mails are routed showed that . Use a 5% level of significance to test the claim that there has been a change (either way) in the average number of e-mails received per day per employee. What is the level of significance?

Select one:

a. α = 0.05

b. α = 0.15

c. α = 0.95

d. α = 0.90

e. α = 0.98

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