Question

If Professor Wilson found that the test scores of his students had a variance of 4.4, what is the standard deviation? Type a numerical answer in the space provided. Round your answer to the nearest tenth.

Answer 1

The standard deviation will be: 2.1

Explanation:

We know that standard deviation is basically the square root of variance.

Using the formula to calculate the standard deviation

`s=√(s^2)`

As

• The variance = s² = 4.4

so the standard deviation can be calculated as:

standard deviation
`=√(s^2)`

`=√(\left(4.4\right)^)`

`=2.1`

Therefore, the standard deviation will be: 2.1