Construct a grouped frequency distribution for the following 28 scores using a class width of 4:

Question

64 63 58 46 52 62 47 49 56 47 43 41 45 51
60 62 51 61 50 55 56 53 54 58 48 48 58 46

Answer 1

46-49 = ?
50-53 = ?
53-56 = ?
57-60 = ?
61-64 = ?

Answer 2

I get -3 for all of those??