Question

What Is The Variance Of First 20 Natural Numbers

Answer 1

Answer:

nhi h 20 natural number

Answer 2

Answer:

133/4

Step-by-step explanation:

Variance of first n natural numbers is =

n∑(x i ) 2 −(Mean) 2 = n1 2 +2 2 +3 2 .....n 2 −( 2n+1 ) 2 σ 2 = 6nn(n+1)(2n+1) − 4(n+1) 2

σ 2 = 12n/ 2 −1

So variance of first 20 natural number

=σ 2 = 1220/ 2 −1 = 399/12 = 133/4