Use the information given in question 36 to find the correlation between advertising dollars and sales.

Question 36

Suppose you have the following information about number of dollars spent on advertising, X, and amount of car sales, Y: Cov(X,Y) = 500, Var(X) = 250, Var(Y) = 1,000, mean of X = 1,000, and mean of Y = 2,500. Use this information to estimate the parameters a and b.