Question

calculate S.D. Coefficient of S.D and Coefficier voration by short cut method
7 , 19 , 12 , 14 , 16 , 13 , 17 , 18​

Answer 1

Step-by-step explanation:

Answer:

33.25

Step-by-step explanation:

First 20 natural numbers= 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20

Mean =

So, Mean =

Mean =

Variance =

So,

Hence the variance of first 20 natural numbers is 33.25

Answer 2

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First 20 natural numbers= 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20

Mean =

So, Mean =

Mean =

Variance =

So,

Hence the variance of first 20 natural numbers is 33.25