How Do You Calculate A Correlation Coeffiicent?
The value of a correlation coefficient will always be between 1 and -1. A correlation coefficient that has a value of exactly 1 or -1 would be a perfectly straight line when the data sets are plotted on a graph. Values that are close to 0 tell us there is no relationship between the values of X and Y. Positive correlation coefficients tell us that when one variable is increased, the other variable will increase as well. Negative correlation coefficients tell us that as one of the variables is increased, the other variable will decrease. Make a five-column table of your values with a pen and paper. The column heads will be in the order of X, X^2, Y, Y^2, and XY. The bottom of each column will contain the sum of the values for that particular column. Data set: X | Y 1 | 2 3 | 4 5 | 6 Five-column table: X| X^2| Y| Y^2| XY| 1| 1| 2| 4| 2| 3| 9| 4| 16| 12| 5| 25| 6| 36| 30| 9| 35| 12| 56| 44| Start your calculations to find the numerator of the correlation coefficient formula. The numerator
