11.5

Print Degrees of Freedom in the Numerator Area in Right Tail 12 15 20 60 120 1000 0.100 2.38 2.34 2.30 3236 0.050 3.07 3.01 2.94 0.025 3.67 0.010 5.11 4.81 0.001 957 9.24 8.90 0.100 2.28 2.24 2.20 0.050 2.91 10 0.025 3.62 3.52 3.42 0 010 4.56 4.41 0.001 8.45 8.13 7.80 760 0.100 2.15 2.10 2.62 2.06 0.050 12 0.025 3.28 3,07 0.010 0.001 6.71 6.40 0.100 2.02 0.050 240 15 0.025 0.010 3.67 286 5.81 3.54 0.100 1,89 184 0.050 20 0.025 0.010 3.23 257 0.001 4.82 4.56 Degrees of Freedom in the Denominator 0.100 1.82 0.050 2.16 25 0.025 241 0.010 0.001 431 4.06 0.100 0.050 0.025 195 163 50 256 0.001 3.44 3.20 0.100 161 156 0.050 100 0.025 0.010 2:37 0.001 3.07 284 0.100 1.58 0.050 0.025 2.01 172 200 0.010 0.001 2.90 2.67 2.42 0.100 1.76 149 1.43 (.050 1.96 FEEE 1006 0.025 0.010 190 0.001 Degrees of Freedom in the Numerator Area in 60 120 1000 Right Tail 12 15 20 25 30 40 50 (1) 0 61 =62 (2) 0 01 = 62 (3) O Do not reject (4) O is not O Reject O is 0 61 >62 0 61 # 02 0 61 02 0 01 OC. FO the variability of wait Therefore, there (3) sufficient evidence to conclude that the variability in wait times for the single line is (4) times for the multiple lines at the 0.05 level of significance. (b) Draw boxplots of each data set to confirm the results of part (a) visually. Choose the correct graph below. O A. OB O c. Q Single Multiple Multiple -II- -II Single -1 Multiple Single 1 2 3 4 5 12 3 4 5 1 2 3 4 5 Wait Time (minutes) Wait Time (minutes) Wait Time (minutes) 13: Wait Time Full data set Single Line Multiple Lines 1.3 2.1 1.7 2.8 1.1 1.6 2.9 4.6 1.8 2.1 2.4 3.0 3.8 2.9 2.8 2.9 2.0 2.3 1.9 2.9 4.5 2.3 2.0 2.6 2.6 2.0 2.9 2.3 1.3 1.3 2.0 2.7 2.8 1.1 3.1 18 2.0 3.2 2.3 0.9 14: Table of critical values for the F-distribution (page 1) Degrees of Freedom in the Numerator Area in Right Tail 2 7 39.86 49.59 53.59 55.83 57.24 58.20 58.91 59.44 0.100 199.50 215.71 230.16 36.77 0.050 161.45 ann se miles