Use the data given below, which shows the retirement ages for a sample of engineers, to
construct a cumulative frequency distribution using SIX (6) classes. (8 marks)
60 65 68 63 66 67 69 67
58 65 67 61 63 65 62 64
73 50 61 71 62 69 72 63
B. Construct a cumulative frequency curve using the frequency distribution constructed in
(A). (6 marks)
C. Using your curve or otherwise determine:
i. the median retirement age (2 marks)
ii. the age that represents the 30th percentile, explain briefly what this value indicates