Compute the standard deviation for each set. ...

Compute the standard deviation for each set.
 

Set 1: {6, 6, 6, 6, 6, 6, 6}
Set 2: {5, 5, 6, 6, 6, 7, 7}
Set 3: {5, 5, 5, 6, 7, 7, 7}
Set 4: {3, 3, 3, 6, 9, 9, 9}