Compute the average and print the standard deviation of four scores. The standard deviation is defined to be the square root of the average of four scores where a is the average of the four values (S...

Compute the average and print the standard deviation of four scores. The standard deviation is defined to be the square root of the average of four scores where
a
 is the average of the four values (S_{i –}a)²where
a
 is the average of the four scores of s1, s2, s3, and s4.