For the sample of eight bears, researchers measured the distances around the bears' chests and weighed the bears. Minitab was used to find that the value of the linear correlation coefficient is r= 0.728. Using alpha = 0.05, determine if there is a linear correlation between chest size and weight. What proportion of the variation in weight can be explained by the linear relationship between weight and chest size?
a.) Is there a linear correlation between chest size and weight?
b.) What proportion of the variation in weight can be explained by the linear relationship bwteen weight and chest size? ( round to three decimal places as needed.)