45 people are randomly selected and the accuracy of their wristwatches is checked, with positive errors representing watches that are ahead of the correct time and negative errors representing watches...

45 people are randomly selected and the accuracy of their wristwatches is checked, with positive errors representing watches that are ahead of the correct time and negative errors representing watches that are behind the correct time. The 45 watches have an average error of 115 sec and the sample standard deviation of the watch errors is 222 sec. Use a 0.01 significance level to test the claim that the average watch reads the correct time (use a two-sided alternative).

(a) What is the Test-Statistic? _______

(b) What is the P-Value? ______