The following are the ages of 50 workers
who worked in a factory some years back.
71 79 46 35 25 28 56 82 52 68
68 64 93 95 78 43 58 72 57 60
50 98 62 63 70 73 53 44 86 79
72 68 88 51 32 59 72 73 46 85
40 55 52 61 96 67 82 72 48 59
(a) Using class intervals of 21-30, 31-40.
41-50....... draw a frequency table for
the distribution.
(b) Draw the cumulative frequency curve
(ogive) and determine
(i)the median (ii) inter-quartile range.
(c) If a worker is picked at random, what
is the probability that he is more than
60 years.