How do you find the standard deviation of 5.6, 5.2, 4.6, 4.9, 5.7, 6.4?
First, find the mean:
Now find the sum of the differences between the mean and all the points. Square those results:
Find the average of the differences:
Now square root the result:
Using graphing calculator
You can do this problem very easily using a graphing calculator.
First, put the data set in a list. Go to stat, then edit, and then put in your numbers in one column.
Then, go to stat, then calc, then 1 var stats. Plug in your list and press calculate. Your result is