An ongoing study of wolves is being conducted at the Yukon-Charley Rivers National Preserve.

Table D.9 in the Data Bank gives the physical characteristics of wolves that were captured.

Males Body length (cm) 134 143 148 127 136 146 Weight (lb) 71 93 101 84 88 117 Body length (cm) 142 139 140 133 123 Weight (lb) 86 86 93 86 106

(a) Plot length versus weight for the male wolves. From your visual inspection, estimate the value of the correlation coefficient.

(b) Calculate the sample correlation coefficient for male wolves.

(c) Create a multiple scatter diagram by adding the points for female wolves from Table D.9 to your plot in part (a). Do the patterns of correlation for males and females appear to be similar or different?