Refer to Data Set 9 in Appendix B and consider the gross amounts from two different categories of movies: those with R ratings, and those with ratings of PG or PG-13. Use the coefficients of variation to determine whether the two categories appear to have the same amount of variation.

Refer to the indicated data set in Appendix B. Use computer software or a calculator to find the range, variance, and standard deviation.

Data Set 9: Movies STATDISK: Data set name is Movies. Minitab: Worksheet name is MOVIES.MTW. Workbook name is MOVIES.XLs. App name is MOoVIES and the file names are the same as for text files. MVBUD, MVGRS, MVLEN, MVRAT. Excel: TI-83/84 Plus: Text file names: Budget ($) in Millions Gross ($) in Millions MPAA Length (min) Viewer Title Rating Rating 8 Mile Alone in the Dark R R 41.0 20.0 117 5 110 96 6.7 2.2 Aviator PG-13 116.0 103 66 170 125 119 7.6 Big Fish Bourne Identity Break-Up Charlie's Angels: Full Throttle PG-13 PG-13 PG-13 PG-13 70.0 8.0 7.4 121 116 75.0 52.0 105 106 120 113 5.8 120.0 65.0 101 100 4.8 7.7 Collateral R Crash R 6.5 55 104 8.3 Daddy Day Care DaVinci Code PG PG-13 60.0 92 5.7 125.0 213 34 12 149 108 81 6.5 8.6 1.9 Eternal Sunshine R PG 20.0 From Justin to Kelly Harry Potter Goblet of Fire Hostel House of the Dead 5.0 150.0 4.5 7.0 290 47 7.8 PG-13 R 157 94 5.8 R 10 90 2.0 7.8 Last Samurai R 100.0 111 154 132 150 97 PG-13 Million Dollar Baby Pirates of the Carribbean (II) 30.0 225.0 100 322 19 8.4 7.5 PG-13 Rollerball PG-13 70.0 2.7 S.W.A.T. PG-13 80.0 117 117 6.0 Secret Window PG-13 PG-13 R 40.0 70.0 48 228 96 6.3 7.0 6.6 Signs Silent Hill Son of the Mask Spider-Man 2 Star Wars II Sum of All Fears The Pianist 106 127 50.0 74.0 47 17 PG 94 2.0 PG-13 PG-13 200.0 373 127 7.8 113.0 380 140 124 150 8.0 PG-13 R 68.0 35.0 118 33 6.4 8.5 PG-13 PG-13 The Village Van Helsing Vanilla Sky Walk the Line War of the Worlds 72.0 114 108 132 6.6 5.3 6.8 160.0 120 101 120 234 68.0 136 136 PG-13 29.0 132.0 8.1 6.7 PG-13 R 116 119 Wedding Crashers 40.0 209 7.3