Answer Happy

The accompanying data represent the running times of files produced by two motion-picture companies. Assume that the running-time differences are approximately normally distributed. Construct a 90% confidence interval for If a 90% confidence interval for H₁-H₁ were created, should it be assumed that o² = 0²? 02 Time (minutes) 115 92 118 96 86 120 Click here to view page 1 of the table of critical values of the F-distribution, for alpha= 0.05. Click here to view page 2 of the table of critical values of the F-distribution, for alpha= 0.05. Company I || 107 92 92 77 The confidence interval is << (Round to three decimal places as needed.) 98 174

Critical Values of the F-Distribution, for alpha = 0.05 (Page 1) D Critical Values of the F-Distribution V2 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 1 161.45 18.51 10.13 7.71 6.61 5.99 5.59 5.32 5.12 4.96 4.84 4.75 4.67 4.60 4.54 4.49 4.45 4.41 4.38 4.35 4.32 4.30 4.28 4.26 4.24 4.23 4.21 4.20 4.18 2 199.50 19.00 9.55 6.94 5.79 5.14 4.74 4.46 4.26 4.10 3.98 3.89 3.81 3.74 3.68 3.63 3.59 3.55 3.52 3.49 3.47 3.44 3.42 3.40 3.39 3.37 3.35 3.34 3.33 3 215.71 19.16 9.28 6.59 5.41 4.76 4.35 4.07 3.86 3.71 3.59 3.49 3.41 3.34 3.29 3.24 3.20 3.16 3.13 3.10 3.07 3.05 3.03 3.01 2.99 2.98 2.96 2.95 2.93 V1 5 224.58 230.16 4 19.25 19.30 9.01 6.26 5.05 9.12 6.39 5.19 4.53 4.12 3.84 3.63 3.48 3.36 3.26 3.18 3.11 3.06 3.01 2.96 2.93 2.90 2.87 2.84 2.82 2.80 2.78 2.76 fo.05 (v1, v2) 2.74 2.73 2.71 2.70 4.39 3.97 3.69 3.48 3.33 3.20 3.11 3.03 2.96 2.90 2.85 2.81 2.77 2.74 2.71 2.68 2.66 2.64 2.62 2.60 2.59 2.57 2.56 2.55 6 233.99 19.33 8.94 6.16 4.95 4.28 3.87 3.58 3.37 3.22 3.09 3.00 2.92 2.85 2.79 2.74 2.70 2.66 2.63 2.60 2.57 2.55 2.53 2.51 2.49 2.47 2.46 2.45 2.43 7 8 236.77 238.88 19.35 19.37 8.89 6.09 4.88 4.21 3.79 3.50 3.29 3.14 3.01 2.91 2.83 2.76 2.71 2.66 2.61 2.58 2.54 2.51 2.49 2.46 2.44 2.42 2.40 2.39 2.37 2.36 2.35 8.85 6.04 4.82 4.15 3.73 3.44 3.23 3.07 2.95 2.85 2.77 2.70 2.64 2.59 2.55 2.51 2.48 2.45 2.42 2.40 2.37 2.36 2.34 2.32 2.31 2.29 2.28 9 240.54 19.38 8.81 6.00 4.77 2.65 2.59 4.10 3.68 3.39 3.18 3.02 10 V₂ 1 2 2.42 2.39 3 4 2.90 11 2.80 12 2.71 13 5 2.30 2.28 6 7 8 9 2.27 2.25 2.24 2.22 2.54 16 2.49 17 2.46 18 19 20 14 15 2.37 21 2.34 2.32 22 23 24 25 26 27 28 29

Critical Values of the F-Distribution, for alpha = 0.05 (Page 2) Critical Values of the F-Distribution V2 10 12 15 20 24 30 1 241.88 243.91 245.95 248.01 249.05 250.10 2 19.41 3 8.74 4 5.91 5 4.68 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 19.40 8.79 5.96 4.74 4.06 3.64 3.35 3.14 2.98 2.85 2.75 2.67 2.60 2.54 2.49 2.45 2.41 2.38 2.35 2.32 2.30 2.27 2.25 2.24 2.22 2.20 2.19 2.18 4.00 3.57 3.28 3.07 2.91 2.79 2.69 2.60 2.53 2.48 2.42 2.38 2.34 2.31 2.28 2.25 2.23 2.20 2.18 2.16 2.15 2.13 2.12 2.10 19.43 19.45 8.70 8.66 5.86 5.80 4.62 4.56 3.94 3.51 3.22 3.01 2.85 2.72 2.62 2.53 2.46 2.40 2.35 2.31 2.27 2.23 2.20 2.18 2.15 2.13 2.11 2.09 2.07 2.06 2.04 2.03 2.65 2.54 3.87 3.84 3.44 3.41 3.15 3.12 2.94 2.77 2.46 2.39 2.33 2.28 2.23 2.19 2.16 2.12 fo.05 (V1, V2) V1 2.10 2.07 2.05 2.03 2.01 1.99 1.97 1.96 1.94 19.45 19.46 8.64 5.77 4.53 2.90 2.74 2.61 2.51 2.42 2.35 2.29 2.24 2.19 2.15 2.11 2.08 2.05 2.03 2.01 1.98 1.96 1.95 1.93 1.91 1.90 8.62 5.75 4.50 3.81 3.38 3.08 2.86 2.70 2.57 2.47 2.38 2.31 2.25 2.19 2.15 2.11 2.07 2.04 2.01 1.98 1.96 1.94 1.92 1.90 1.88 1.87 1.85 40 60 120 251.14 252.20 253.25 254.31 19.47 19.48 19.49 19.50 8.59 8.57 8.55 8.53 5.72 5.69 5.66 5.63 4.46 4.43 4.40 4.36 3.77 3.34 3.04 2.83 2.66 2.15 2.10 2.06 2.03 1.99 2.53 2.49 2.43 2.38 2.34 2.30 2.25 2.27 2.22 2.18 2.20 2.16 2.11 1.96 1.94 1.91 1.89 1.87 1.85 1.84 3.74 3.30 3.01 2.79 2.62 1.82 1.81 2.11 2.06 2.02 1.98 1.95 1.92 1.89 1.86 1.84 1.82 3.70 3.27 2.97 2.75 2.58 1.80 1.79 1.77 1.75 2.45 2.34 1.97 1.93 1.90 2.06 2.01 2.01 1.96 1.87 1.84 1.81 1.79 1.77 3.67 3.23 2.93 2.71 2.54 1.75 1.73 1.71 1.70 2.40 2.30 2.21 2.13 2.07 1.92 1.88 1.84 1.81 1.78 1.76 1.73 1.71 1.69 1.67 1.65 1.64 V2 1 23 2 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