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- 25 - Table 8 MEAN DIFFERENCES BETWEEN RATINGS OF MATCHED PAIRS OF ELIMINATED PILOTS AND THEIR SUCCESSFUL CONTROL PILOTS ON CERTAIN PILOT BEHAVIOR EVALUATED BY CAPTAINS OF IDENTICAL FLIGHT CHECKS [[7 Columned Table]] | Pilot Behavior | Number of Pilots in each group | Numbers Ratings on each group | Mean difference (C-E) | S.E. of Mean Difference | t.ratio | Level of Significance | | --- | --- | --- | --- | --- | --- | --- | | Contact Flying Ability | 85 | 107 | .64 | .101 | 6.337 | 1% | | Flight Performance | | Navigation | | Enroute Flying Ability | | Air Work | | Execution of Flight | | Instrument Flying Ability | 85 | 363 | 2.89 | .688 | 4.201 | 1% | | General Instrument Work | | Let-down and Approach | | Use of Navigational Aids | | Smoothness and Accuracy | | Beam Orientation | | Approach and Landing (Contact) | 28 | 148 | 3.11 | .611 | 5.090 | 1% | | Takeoff and Climb (Contact) | 28 | 201 | 1.73 | .352 | 4.915 | 1% | | Flight Planning and Analysis | 57 | 97 | .66 | .131 | 5.038 | 1% | | Demonstration of Route Knowledge | 57 | 57 | .43 | .089 | 4.831 | 1% | | Demonstration of Knowledge of Mechanical Details | 42 | 42 | .04 | .065 | .615 | not significant | | Observance and Knowledge of Regulations | 77 | 154 | .60 | .161 | 3.727 | 1% | | General Progress in Comparison with Others | 51 | 51 | .78 | .105 | 7.414 | 1% |