You are given the following information for the data displayed in the scatterplot in Exercise 5.

Least squares prediction equation: Y' = .34(X) €“ .56
SS_y = 826.23

SS_y|x = 145.44

Using this information, calculate these measures.

a. The SS measure of the actual gain in accuracy due to the least squares predictions

b. The gain in accuracy relative to the original error variability for the repetitive prediction of the arm circumference mean

c. r²

d. r

Data from exercise 5

45 40 35 25 20 60 80 100 120 140 Waist (cm) Arm Circumference (cm)