Use the following table to answer the questions. (Give your answers correct to two decimal places.)
x 1 1 3 3 5 5 7 7 9 9
y 3 2 4 2 6 3 3 4 1 2
(a) Find the equation of the line of best fit. y hat = + x
(b) Find the ordinates y hat for the points on the line of best fit whose abscissas are x = 1, 3, 5, 7, and 9.
(c) Find the value of e for each of the points above (e = y - y hat).
(d) Find the variance se2 of those points about the line of best fit.