We have, total frequency, N = 30
N/2 = 30/2 = 15
Observe, cf = 19 is just greater than 15.
Thus, median class = 55-60
Median is given by
L = Lower class limit of median class = 55
N/2 = 15
cf = cumulative frequency of the class preceding median class = 13
f = frequency of the median class = 6
h = class interval of the median class = 5
Substituting these values in the formula of median, we get
⇒ Median = 55 + 1.67
⇒ Median = 56.67
Thus, the median is 56.67 kg.
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