How do you calculate standard deviation on a Casio fx-115ES calculator?

standard deviation

calculate mean of a data set:

1. Turn calc. on or press MODE SeTUP

2.Press 3 for STAT

3. Press 1 for VAR

4.Enter values for X column

5. When done entering press SHIFT 1

6.Press 5

7.Press 2 to calculate the mean

8.Press =

i did not come up with this explanation myself i found it on a website called fixya.com so I'm not taking credit for the answer but it works.