A pipes manufacturer makes pipes with a length that is supposed to he 13 inches. a quality central technician sampled 16 pipes and found that the sample mean length was 13.08 inches and the sample standard deviation was 0.23 inches. The technician claims that the mean pipe length is not 13 inches. What type of hypothesis test should he performed? What is the test statistic? 5120.123 What is the number of degrees of freedom'?I 33120 Does sufcient euldwt at the o: = [3.05 significance level to support the technician's claim