What is the standard deviation of {1, 2, 3, 4, 5}?
1 Answer
Nov 1, 2015
The answer is
Explanation:
Note that the formula of variance for calculation purpose is
1/n sum_(i=1) ^n x_i^2 - (1/n sum_(i=1)^n x_i)^2
where
In your given data we have
So, your variance
= 1/5 [ 1^2+2^2+ 3^2 +4^2+5^2] - (1/5 *[ 1+2+3+4+5])^2
= 11 -9
=6