Table 7. Flight simulated instrument flight evaluation t-test by regidence

Group Obs Mean Std. Dev. 95% Conf. Interval
Seoul 30 21.261 9.142 17.847 24.675
Province 100 21.145 7.387 19.679 22.611
Diff 0.444 -3.105 3.3367
diff = mean(0) - mean(1)  t = 0.071Ho: diff = 0 degrees of freedom =128
Ha: diff < 0Pr(T<t) = 0.528 **Ha: diff != 0Pr(|T|>|t|) = 0.943 Ha: diff > 0Pr(T>t) = 0.471