calculate the standard deviation from the following data size 5 10 15 20 AND FREQUENCY 2 1 4 3
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Answer:
⇒ The given numbers are 3,4,8,10,15,20.
⇒
X
=
6
3+4+8+10+15+20
=10
X X−
X
(X−
X
)
2
3 −7 49
4 −6 36
8 −2 4
10 0 0
15 5 25
20 10 100
∑(X−
X
)
2
=214
⇒ S=
N
(X−
X
)
2
=
6
214
=
35.66
=5.97
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