Question

Last year, during an investigation of the time spent reading e-mails on a daily basis, researchers found that on Monday the average time was 50 minutes. Office workers claim that with the increased spam and junk mail, this time has now increased. To conduct a test, a sample of 25 employees is selected with the following results: sample mean = 48.95 minutes and sample standard deviation = 4.42 minutes. Calculate the appropriate test statistic to test the hypothesis that the time has increased from last year.

-1.76

1.19

-1.19

2.38

1.76

Answer 1

PAGE 1 Cheont Question 5 The proposed hypothees in this case is as toliauza: Ho: M50. va HH Mc 50. There are the test stabahre under holz al follows: a u At the A u anda x M & now t s sample mean 48.95 & a sample standard denahan 4.4.2

PAGE 2 Question . 25 som ble size 48.95-50 4142 125 1.05 4.42 1.187782805 n t254 . 187782805 utst Hence, the teat-tahatics t24 - 1.19