3) Let x have a mean of 7.2 and a standard deviation of 2.8. Let y have a mean of 12.6 and a standard deviation of 4.31. Let the correlation, r, between x and y be 0.41. Using the formulas above, calculate the regression coefficient, b, and the y-intercept, b₀, for the regression model.

(a) Write down the numerical values for both b and b₀.

(b) Given the value that you obtained for b, how would you interpret this regression coefficient?

S b =r b = y- b,x bo + bix, S x