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34.5 - 39.5 12 335

39.5 - 44.5 9 344
44.5 - 49.5 5 349
49.5 - 54.5 3 352

54.5 - 59.5 3 355
59.5 and above 2 357

the cumulative frequency just greater than N/2 is 193 and the corresponding class is
(19.5 - 24.5).
Thus the median class is (19.5 - 24.5)
l = 19.5, h = 24.5 - 19.5 = 5, f = 140, c.f = 53.

= 23.98
= 24 (approx.)
*Relationship between Mean, Median and Mode
There is an empirical relationship between the three measures of central tendency,
which is given by
MODE=3 MEDIAN – 2 MEAN

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