50 people are randomly selected and the accuracy of their wristwatches is checked, with positive emors representing watches that are ahead of the correct time and negative errors representing watches that are behind the correct time. The 50 values have a mean of 120sec and a standard deviation of 21-4sec Use a 0.01 significance level to test the claim that the population of all watches has a mean of sec The test statistic is The P-Value is The final conclustion is A. There is not sufficient evidence to warrant rejection of the claim that the mean is equal to B. There is sufficient evidence to warrant rejection of the claim that the mean is equal to O