HW 8 Practice for the Final Exam: Problem 24 Previous Problem Problem List Next Problem (1 point) 40 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 40 values have a mean of 107 sec and a standard deviation of 169 sec. Use a 0.01 significance level to test the claim that the population of all watches has a mean of 0 sec. The test statistic is Round off your answer to three decimal places. The final conclustion is A. There is sufficient evidence to warrant rejection of the claim that the mean is equal to 0 O B. There is not sufficient evidence to warrant rejection of the claim that the mean is equal to 0 Note: You can earn partial credit on this problem.HW 8 Practice for the Final Exam: Problem 23 Previous Problem Problem List Next Problem (1 point) A sample of 8 measurements, randomly selected from a normally distributed population, resulted in a sample mean, x = 6.5 and sample standard deviation s = 1.08. Using a = 0.05, test the null hypothesis that the mean of the population is 7.2 against the alternative hypothesis that the mean of the population, u