Write a program that computes the average and standard deviation of the text floating point numbers in a file. Use the following formulas for the average and the standard deviation of N values. The formulas compute the sum, the sum of squares, the average, the average square, the variance, and finally, the standard deviation.
sum = x1 + x2 + x3 + ... + xN-1 + xN

sumSQ = x12 + x22 + x32 + ... + xN-12 + xN2

avg = sum/N

avgSQ = avgSQ/N

var = avgSQ - avg2

sd = var(1/2)
The input file will contain any number text floating point numbers, similar to the following:
10.5
12.9
9.67
12.05
8.23
10.08
10.23
7.7
10.4
11.34
Numbers could be several, or none per line, and negative numbers are perfectly OK.

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Edited 5 Years Ago by JamesCherrill: n/a

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