F G H A B C D E Interval Estimation for the Difference Between Formulas Smaller Ships Larger Ships 93 80.5 Two Population Means, Sigma Known Case 84. 11 85.67 #N/A 87.48 83.52 Sample 1 Size #N/A 83.06 28.79 Sample 2 Size 92.6 79.8 #N/A 72.96 82.81 Sample 1 Mean #N/A 77.41 80.93 Sample 2 Mean 85.78 Point Estimate for Mean Difference (2 decimals) #N/A 74.96 10 80.77 91.72 11 90.2 78.9 Population 1 Standard Deviation 5.641728 5.084434 12 85.45 82.73 Population 2 Standard Deviation 13 86.53 81.63 #N/A 14 80.84 20.23 Population 1 Variance #N/A 15 88.14 77.82 Population 2 Variance 16 87.2 01.2 #N/A 17 83.37 85.14 Standard Error 18 89.38 83.74 #N/A 19 75.57 76.82 z-critical (2 decimals) 20 76.55 76.63 #N/A 21 75.33 81.2 Margin of error (2 decimals) 22 85.61 82.33 #N/A 23 90.97 74.93 C.I. Lower Limit (2 decimals) C.I. Upper Limit (2 decimals) #N/A 24 89.18 78.63 25 88.05 74.91 26 93.81 83.08 27 83.33 74.95 28 89.84 81.86 29 81.78 81.36 30 86.21 87.81 31 91.4 85.18 32 72.74 86.88 33 90.37 74.85 34 76.90 75.21 35 79.67 81.72 36 84.81 82.75 37 84.8 86.59 38 85.92 75.24 39 86.33 40 80.44 41 83.87 42 81.54 43 85.7 44 78.81 45 79.53