11. Find the standard deviation of 'n' natural numbers

Write the formula to find the standard deviation of first \(n\) natural numbers. Using this formula, find the standard deviation of first 11 natural numbers.

 

 

(i) The formula to find the standard deviation of first \(n\) natural numbers is $\sqrt{\frac{i^{i}ii}{i}}$

 

(ii) The standard deviation of first 11 natural numbers is .

 

[Note: Enter the answer rounded to two decimal places.]