Table 5. Flight simulated instrument flight evaluation
t
-test by marry
Group
Obs
Mean
Std. Dev.
95% Conf. Interval
Single
122
21.273
7.7683
19.881 22.666
Married
8
19.618
8.4917
12.519 26.718
Diff
1.655
-3.9845 7.2948
diff = mean(0) - mean(1)
t
= 0.580
Ho: diff = 0 degrees of freedom =128
Ha: diff < 0
Pr(T<
t
) = 0.718
**
Ha: diff != 0
Pr(|T|>|
t
|) = 0.562
Ha: diff > 0
Pr(T>
t
) = 0.2812