Table 4. Flight aptitude evaluation
t
-test by flight experience
Group
Obs
Mean
Std. Dev.
95% Conf. Interval
No-expe
97
89.278
3.128
88.647
89.908
FLTexper
11
93.145
1.7328
91.981
94.309
Diff
-3.8671
-5.7748
-1.9593
diff = mean(0) - mean(1)
Ho: diff = 0
t
= -4.019
degrees of freedom = 106
Ha: diff < 0
Pr(T<t) = 0.0001
**
Ha: diff != 0
Pr(|T|>|t|) = 0.0001
Ha: diff > 0
Pr(T>t) = 0.999
p
<.05.