Class boundaries Class limits Class boundaries Class midpoints Frequency Cumulative frequency 19 - 23 18.5 - 23.5 21 2 2 24 - 28 23.5 - 28.5 26 W U 29 - 33 28.5 - 33.5 31 6 34 - 38 33.5 - 38.5 36 4 10 39 - 43 38.5 - 43.5 41 U 15 44 - 48 43.5 - 48.5 46 W 18 49 - 53 48.5 - 53.5 51 19 Part 1 of 4 (a) How many values are in the class 28.5 - 33.5? The number of values in the class 28.5 - 33.5 is X 5