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A pipes manufacturer makes pipes with a length that is supposed to be 14 inches. A quality control technician sampled 16 pipes and found that the sample mean length was 14.07 inches and the sample standard deviation was 0.22 inches. The technician claims that the mean pipe length is not 14 inches What type of hypothesis test should be performed? Select What is the test statistic? Ex: 0.123 What is the number of degrees of freedom? EX: 20 Does sufficient evidence exist at the o =1 0.01 significance level to support the technician's claim? Select v