# math help

posted by
**Tracy** on
.

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 6 1 3 3 3 2 5 3

(a) Find the equation of the line of best fit.

y hat = + x

(ii) Graph this equation on a scatter diagram. (Do this on paper. Your instructor may ask you to turn in this work.)

(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.

1 Incorrect: Your answer is incorrect. .

3 Incorrect: Your answer is incorrect. .

5 Incorrect: Your answer is incorrect. .

7 Incorrect: Your answer is incorrect. .

9 Incorrect: Your answer is incorrect. .

(c) Find the value of e for each of the points above (e = y - y hat).

y e y e

3 Incorrect: Your answer is incorrect. . 3 Incorrect: Your answer is incorrect. .

2 Incorrect: Your answer is incorrect. . 3

6 Incorrect: Your answer is incorrect. . 2 Incorrect: Your answer is incorrect. .

1 5

3 3

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