Table 11. Actural instrument flight evaluation t-test by marry

Group	Obs	Mean	Std. Dev.	95% Conf. Interval
Single	122	16.909	6.006	15.832 17.985
Married	8	15.743	6.650	10.183 21.303
Diff		1.165		-5.529
diff = mean(0) - mean(1)  t = 0..528Ho: diff = 0  degrees of freedom =128
Ha: diff < 0Pr(T<t) = 0.709		**Ha: diff != 0Pr(|T|>|t|) = 0.598		Ha: diff > 0Pr(T>t) = 0.299