The fourth step is to square each of
these numbers. Remember, when you have negative numbers and you square
them, the result is a positive number.
Table 4
Correlation -- Step
5
The fifth step is to sum these columns.
The result is called sums of squares. Then divide this number by the number
of scores. The result is called the variance. Now take the variance and
calculate its square root. The result is called the standard deviation.
Part II:
Chapter 3 Experimental and Quasi-Experimental Research
