pilots 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 Group 1 5 5 6 5 4 5 3 3 2 4 5 5 4 3 6 5 5 4 7 3 2 5 5 3 4 5 5 4 5 5 3 6 2 2 4 5 0 0 Group 2 60 60 30 60 20 60 40 50 40 40 60 60 20 40 30 60 60 30 20 50 10 60 60 30 30 60 60 30 60 60 20 10 30 40 50 60 0 0 3 Y Y Y Y N Y Y Y N Y Y Y N Y Y Y Y N N N Y Y Y N N Y Y N Y Y Y Y N Y Y Y N N 39 40 41 42 43 44 45 46 47 48 49 50 0 3 5 4 5 2 5 3 4 5 5 1 0 20 60 60 60 10 60 20 30 40 60 15 N N Y Y Y N Y N N Y Y N Descriptive Analysis Column1 Column2 Mean Standard Error Median Mode Standard Deviation Sample Variance Kurtosis Skewness Range Minimum Maximum Sum Count Largest(1) Smallest(1) Confidence Level(95.0%) 3.92 0.2264905 4 5 1.6015299 2.564898 0.4121816 -0.858107 7 0 7 196 50 7 0 Mean Standard Error Median Mode Standard Deviation Sample Variance Kurtosis Skewness Range Minimum Maximum Sum Count Largest(1) Smallest(1) Confidence 0.4551497 Level(95.0%) 39.9 2.83019 40 60 20.0125 400.5 -1.0789 -0.4661 60 0 60 1995 50 60 0 5.68749 the correlational analysis 5 5 60 1 0.609399 2 60 1 t-Test: Two-Sample Assuming Unequal Variances 5 Mean 3.8979592 Variance 2.5935374 Observations 49 Hypothesized Mean Difference 0 df 49 t Stat -12.41302 P(T<=t) one-tail 4.816E-17 t Critical one-tail 1.6765509 P(T<=t) two-tail 9.632E-17 t Critical two-tail 2.0095752 60 39.48979592 400.255102 49 Interpretation: The average value is 3.92 for group 1 and 39.9 for goup 2. The middle value is 4 and 40 respectively.. The most frequent value is 5 and 60 respectively. Negative skewness indicates a left skewed data. Negative ku indicates a flat distribution. The 95% confidence level indicates you can be 95% sure that the true percentage of the population lies between 3.46485 (3.92 - 0.45515) and 4.3715 (3.93 + 0.45515 ) for group 1 while that of group 2 lies between 34.212512 (39.9 - 5.687488) and 45.587488 (39.9 + 5.687488 )