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A scatter diagram includes the following data points: x 3 2 5 4 5 y 8 6 12 10 14 One regression model is proposed:

A scatter diagram includes the following data points:

x	3	2	5	4	5
y	8	6	12	10	14

One regression model is proposed: .

a) Calculate the standard error of estimate.

b) Using another method, another regression line was proposed: . The SSE (sum of squares of error) of the line is 156. Which of the two lines is a better fit for the data? Why?

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