Chapter 3 ziniog a 10 points noiteingog arty anil onsig lamisob Be my Valentine: The following frequency distribution presents the amounts, in dollars, spent for Valentine's Day gifts decimal places. in a survey of 120 U.S. adults in a recent year. Approximate the mean amount spent on Valentine's Day gifts to two Amount Frequency 0-19.99 mean . (4-3) 3 50 7 20.00-39.99 mean . 3 40.00-59.99 21 + 29 -50 n - 120 n = 120 4 60.00-79.99 19 +50 = 69 5 80.00-99.99 12 + 69 = 81 1/ 10 , 019 4 ) 6 100.00-119.99 10 + 81 = 91 120 209519. 3 7 120.00-139.99 7+ 91 = 98 "fibera erdt 101 agoda woy lis work briA 2 140.00-159.99 8+98 = 106 160.00-179.99 man - 793280 7+ 106= 113 The meant amount spent on ( 180.00-199.99 1+1 13- 114 1 200.00-219.99 3+114 = 117 Valentine's day gift is $179. (2 220.00-239.99 2 +117 = 119 13 240.00-259.99 1+119= 120 amount frequency (f ) mid - point ( m ) m of 0 - 19.99 0 + 19.99 / 29 = 9 9. 9 95 189. 905 20 , 00 - 39.99 10 20 + 39.99 / 2 - 27: 99 5 29 9 . 950 V 40. 00 - 59. 99 21 - 40 + 59.90 / 2 - 49. 995 1049. 895 v 60.00 - 79.99 19 60 + 79.97 /2 969. 995 13 29 . 905V 12 80 +99. 49 / 2 - 89.995 10 79 940 v 80.00 - 99. 99 ( 1099. 950 v 100.00 - 119. 99 10 100+ 119.99 / 2 = 109. 995 120+ 139.99/ 2 = 129. 995 - 1049 . 965 V 120.00 - 139. 99 140+159.99 / 2 = 149. 995 +19 9. 96 0V 140. 00 - 159. 99 160+ 179.99/2 = 169. 995 -1189. 965 V 160.00 - 179. 99 180+ 199.90/ 2= 189. 995 - 189. 995 V 180.00 - 199. 99 20 0 + 219 , 99/ 2= 209 . 995 -7629 . 985 200.00 - 219. 99 3 220 + 289.99/ 2 = 229.995 - 459: 990 220.00 - 239. 9 9 240 + 259.99 / 2 = 249 . 995 7 249. 995 210.00 - 259. 99 TOTAL 120 11 10 019. 4