Question

If the standard deviation is 7.3kg, what is the variance?

Answer 1

The variance is 53.29 kg²

Explanation:

The standard deviation is the square root of the variance.

So

`S(X) = √(V(X))`

In which problem, we have that:

`S(X) = 7.3`

So

`√(V(X)) = 7.3`

`√(V(X))^(2) = (7.3)^(2)`

`V(X) = 53.29`

The variance is 53.29 kg²