Question

Find the variance and the standard deviation of the following set,(5,6,7,8,9)

Answer 1

To find the variance, and standard deviation, calculate first for the mean.

`\begin{gathered} \mu=(\sum x_i)/(n) \\ \mu=(5+6+7+8+9)/(5) \\ \mu=(35)/(5) \\ \mu=7 \end{gathered}`

Now that we have the mean, we can now solve for the variance.