Q1) For men age 18 and over in HANES5,

               Average height ≈ 69 inches,            SD ≈ 3 inches

               Average height ≈ 190 pounds           SD ≈ 42 pounds,    r≈ 0.41

Evaluate average weight of the men whose heights were

a) 69 inches        b) 66 inches           c) 24 inches              d) 0 inches

Q2) Professor measures time X that students take to complete examination, and score Y that students receive. Following measurements are obtained:

X: 10 15 19 30 35 37 40 Average time (X) = 27 SDx = 12

Y: 20 41 54 88 90 97 100 Average score (Y) = 70 SDy = 31

a) Find out correlation coefficient r,

b) Determine the regression equation,

c) If student take 35 minutes to complete exam, what is his predicted score

d) Estimate r.m.s. error for regression equation