A factory that manufactures bolts is performing a qualitv control experiment. Each object should have a length of 15 centimeters. The factory believes that the length of the bolts exceeds this value and measures the length of 99 bolts. The sample mean bolt length was 15.07 centimeters. The population standard deviation is known to be or = 0.26 centimeters. What is the test statistic z? EX? 1'23 What is the pvalue? EK- 0-123 Does sufficient evidence exist that the length of bolts is actually greater than the mean value at a significance level of or = 0.01? SEIECt "