Calculate the Pearson product-moment correlation for the data below.

Question

X 3 4 2 1

Y 5 5 3 4

Answer 1

Using an online calculator:

4 data pairs (x,y):
( 3.00 , 5.00 ); ( 4.00 , 5.00 ); ( 2.00 , 3.00 ); ( 1.00 , 4.00 );

Regression equation:
y = 3 + .5x

Correlation Coefficient:
r = 0.674

Check with your own calculations.