1.Suppose that the correlation r between two quantitative variables was found to be r = 0. This means that:

A.there is a strong linear relationship between the two variables.

B.there is no linear relationship between the two variables.

C.there is a strong relationship between the two variables.

D.there is no relationship between the two variables.

E.none of the above.

2.The data in the scatterplot below are an individual's weight and the time it takes (in seconds) on a treadmill to raise his or her pulse rate to 140 beats per minute. The o's correspond to females and the +'s to males. Which of the following conclusions is most accurate?