Question

the distribution below gives the weight of 30 students of a class find the median weight of the students
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Answer 1

Answer:

 Weight ( in kg )Frequency Cumulative frequency  40−452 2  45−503 5  50−558 13  55−606 19  60−656 25  65−703 28  70−752 30  N=30  We have N=30 and 2N=15.

Median class =55−60, so l=55,f=6,cf=13 and h=60−55=5

Median=l+f2N−cf×h

⇒  Median=55+615−13×5

⇒  Median=55+1.67=56.67kg