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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.

(d) Find the variance se2 of those points about the line of best fit.

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