The marks below are obtained from an examination conducted for 64 students: -

78 62 44 46 34 53 40 51 67 55 46

40 50 51 48 56 81 61 47 40 46 49

35 50 56 48 58 70 38 50 36 61 67

59 64 58 44 54 55 76 40 64 66 46

60 62 70 40 54 36 48 54 31 52 30

50 40 50 56 36 77 71 73 66

Required:

(a) With the class size of 8, starting with 30 -, how many classes will the scores be grouped in? (10 marks)

(b) Prepare a frequency distribution table for the score including the class boundaries, and the frequency columns (10 marks)

c) Determine the median, mode, and mean (10 marks)