R=average of (X in Standard Units) multiplied by (y in Standard Units).
X plots = 1,2,3,4,5,6,7
Find average x
Find SD of x
(do this for each x value... not all together)
- 3. Subtract the average from x Values;and divide it by the SD for each x values.
Note: this will give you the values in standard units. (Example -1.5, .75, 1.75, etc)
Do the same thing for y values
multiply the values of each y and x corresponding values
(the values that were converted to standard units)
- (x in standard units) X (y in standard units).
last take the average of the multiplied values (the product)
.5 + 1 - .75 + 2 - 1 + .75 +1