Q) How many observation classes (i.e. bins) should a histogram of these data contain and how do you determine that?

33 51 46 56 45 52 49 53 59 42 36 73 38 46 37 45 76 67 47 53 73 59 30 42 87 54 47 46 45 38 54 60 45 72 40 42 66 63 44 56 57 55 58 58 55 68 74 45 49 42 83 59 63 34 44 36 57 52 52 71 33 54 52 57 47 60 64 55 45 53 67 51 57 57 49 50 35 76 41 65 59 55 60 39 48 45 68 53 51 44 33 43 46 37 46 53 55 78 60 76

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