Standard deviation of P-A-I-N (p=16 a=1 i=9 n=14)
16+1+9+14=40
(40/4=10) *total divided by number of numbers-now subtract from originals to get
6 -9 -1 4 *now square each one
36 81 1 16 *add together to get
124
Square root of 124 is 5.56
5.5
Hope math is correct, put together in hurry. Could be nothing but was interdasting