CHALLENGE . . Acnvm, I 6.2.1: HypotheSIs test for a population mean. 361326 229454aqx32qy7 Jump to level '1 19 inches. A quality control technician sampled 15 rods and found that the sample mean length was 19.04 inches and the sample standard deviation was 0.15 inches. The technician claims that the mean rod length is less than 19 inches. What type of hypothesis test should be performed? SGIGCT V What is the test statistic? EX: 0.123 What is the number of degrees of freedom? BC 20 Does sufcient evidence exist at the 0; = 0.05 signifcance level to support the technicians claim? SQleCl V gamma,