ALLENGE TIVITY 6.2.1: Hypothesis test for a population mean. 676.1997634.qx3zay7 V Jump to level 1 1 V A rods manufacturer makes rods with a length that is supposed to be 14 2 inches. A quality control technician sampled 12 rods and found that the V sample mean length was 14.08 inches and the sample standard deviation was 3 0.11 inches. The technician claims that the mean rod length is more than 14 inches. 4 Select What type of hypothesis test should be performed? Select Ex: 0.123 What is the test statistic? Two-tailed t-test Ex: 20 Two-tailed z-test What is the number of degrees of freedom? Right-tailed t-test Does sufficient evid Select v t at the a = 0.01 sign Left-tailed t-test ort the technician's claim? 2 4 Check Next