Statistics

8.26 Cats, Part . The following regression output is for predicting the heart weight (in g) of cats from their body weight (in kg). The coefficients are estimated using a dataset of 144 domestic cats. 20 Estimate Std. Error t value Pr(>|t[) (Intercept) -0.357 0.692 -0.515 0.607 body wt 4.034 0.250 16.119 0.000 15 9 = 1.452 R2 = 64.66% R; = 64.41% Heart weight (9) (a) Write out the linear model. (b) Interpret the intercept. 10- (c) Interpret the slope. (d) Interpret R2. 5- (e) Calculate the correlation coefficient. 2.0 2.5 3.0 3.5 4.0 Body weight (kg)