The managers of a weight-loss clinic wish to confirm their belief that there is a relationship between the weight of a person entering the program and the number of pounds lost. The table presents data for 8 of the clinic’s clients.

Use the following regression information for the relationship between beginning weight and pounds lost to complete parts

(a) and (b).

(a) Test the hypothesis that there is no relationship between beginning weight and pounds lost, using the t-test on the slope of the regression line. Let α = .05.

(b) Repeat the test in part (a), but use the t-test on r, the correlation coefficient.

Transcribed Image Text:

x (beginning weight) y (weight loss) x (beginning weight) y (weight loss) 142 15 205 25 306 146 165 15 261 73 289 36 177 50 154 12