CHALLENGE ACTIVITY 6.2.1: Hypothesis test for a population mean. 380306.1982968.qx3zqy7 v Jump to level 1 A factory that manufactures bolts is performing a quality control experiment. 2 Each object should have a length of no more than 15 centimeters. The factory believes that the length of the bolts exceeds this value and measures the length 3 of 55 bolts. The sample mean bolt length was 15.04 centimeters. The population standard deviation is known to be o = 0.27 centimeters. 4 What is the test statistic z? Ex: 1.23 What is the p-value? Ex. 0.123 Does sufficient evidence exist that the length of bolts is actually greater than the mean value at a significance level of a = 0.1? Select v 2 Check Next Feedback