1. The number of calories per serving for selected ready-to-eat cereals is listed in Table 1. (15) 190 140 80 100 120 220 220 110 100 210 130 100 90 210 120 200 130 180 260 90 190 130 200 210 190 130 200 120 180 270 100 160 190 120 190 210 120 190 240 80 120 180 115 210 110 225 a) Calculate and interpret the variance. b) Construct cumulative frequency distribution using limit point grouping.​