There are natural numbers. Answer the following questions considering first natural numbers.
Variance of first n natural numbers is -

There are natural numbers. Answer the following questions considering first natural numbers. Mean of first n natural number is -

Variance of first 20 natural numbers is

Mean of first n natural numbers is

There are natural numbers. Answer the following questions considering first natural numbers. Mean of square of first n natural numbers is -

Variance of first n natural number is …………

The variance of first n natural number is:

The variance of first n natural number is:

The variance of first n natural number is: