The total body bone mineral content is a measure of bone health. Two operators were assigned to collect measurements on the same individuals in a paired experiment. The results below were obtained.

			subjects
Operator	1	2	3	4	5	6	7	8
1	1.328	1.342	1.075	1.228	0.939	1.004	1.178	1.286
2	1.323	1.322	1.073	1.233	0.934	1.019	1.184	1.304

Test at the 5% significance level the null hypothesis that the two operators have the same mean against the alternative that the means are different. The value of the test statistic and the decision are