The height of 50 students of a class are given below:
Height No. Of students
156 - 8
154 - 4
155 - 10
151 - 6
157 - 7 152 - 3
153 - 12 Question from Class 7 Maths RSA
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Step-by-step explanation:
Since its a discrete series, mean=A+ sigma fd/N
median=size of (n+1/2)th item
let 150 be a
x f d=x-a fd cf
147 8 -3 -24 8
149 3 -1 -3 11
150 4 0 0 15
152 7 2 14 22
151 12 1 12 34
158 10 8 80 44
163 6 13 78 50
total 157
_
X=150+157/50
=150+3.14
=53.14
m=size of (50+1/2)th item
=size of (51/2)th item
=size of (25.5)th item
=151
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1
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