American Military University

A manufacturer of flashlight batteries took a sample of 15 batteries from a day's production and used them continuously until they failed to work. The life lengths of the batteries, in hours, until they failed. At the .05 level of significance, is there evidence to suggest that the mean life length of the batteries produced by this manufacturer is more than 500 hours? See attached Excel for Data. Battery Data No, because the p-value for this test is equal to .1164 No, because the p-value for this test is equal to .2978 Yes, because the p-value for this test is equal to .1164 Yes, because the p-value for this test is equal to .2978