What information is provided by the numerical value of the Pearson correlation? In the text.
For the following scores:
X Y
3 12
6 7
3 9
5 7
3 10
a. Compute the Pearson correlation. You should get -0.8333 according to my quick calculation. So, double check.
b. With a small sample, a single point can have a large effect on the magnitude of the correlation. Change the score X = 5 to X = 0 and compare the Pearson correlation again. You should find that the change has dramatic effect on the value of the correlation. You should get correlation = 0.