24. Scott Willard, a famous weatherman on national TV, states that the temperature on a typical late fall day in the upper midwest, measured in terms of both the Celsius and Fahrenheit scales, can be represented as the outcome of the bivariate random variable (C,F) such that E

C F

" # ¼ 5 41  and CovðC; FÞ ¼ 25 45 45 81  :

(a) What is the correlation between C and F?

(b) To what extent is there a linear relationship between C and F? Define the appropriate linear relationship if it exists.

(c) Is (C, F) a degenerate bivariate random variable? Is this a realistic result? Why or why not?