Question

I don’t understand how to do this question please help me to understand

Answer 1

Step-by-step explanation

The standart deviation is a measure that show us how dispersed the data is in relation to the mean.

Lets firts find the mean of this data set:

`Mean=(27+19+26+31+12)/(5)=(115)/(5)=23`

And for the standart deviation:

`\begin{gathered} S=\sqrt{\frac{(27-23)^2+(19-23)^2+(26-23)^2+(31-23)^2+(12-23)^2\text{ }}{5}} \\ S=\sqrt{(226)/(5)} \\ S\approx6.72 \end{gathered}`

Answer

6.72