Consider the following set of data points.

a. Compute the linear correlation coefficient, r.
b. Can you conclude from your answer in part (a) that the variables x and y are unrelated? Explain your answer.
c. Draw a scatterplot for the data.
d. Is use of the linear correlation coefficient as a descriptive measure for the data appropriate? Explain your answer.
e. Show that the data are related by the quadratic equation y = x2. Graph that equation and the data points.

Transcribed Image Text:

r 3 2-1 0 1 2 3 9 4 0 4 9