1- A health researcher read that a (200)pound male can burn an average of (546) calories per hour playing tennis. A (36) males were randomly selected and tested. The mean of the number of calories...

A sprinkler system is designed so that the average time for the sprinklers to activate after being turned on is no more than (15) seconds. A test of (6) systems gave the following times: (17, 31, 12, 17, 13, 25) Is the system working as specified? Test using, a = 0.1.

Extracted text: 1- A health researcher read that a (200)pound male can burn an average of (546) calories per hour playing tennis. A (36) males were randomly selected and tested. The mean of the number of calories burned per hour was (544.8) calories and the standard deviation of the sample is (3). Can it be concluded that the average number of calories burned is actually less than (546) at a = 0.01.