Question: For n = 6 data points, the following quantities have been calculated: a. Determine the least-squares regression line. b. Determine the standard error of estimate.

For n = 6 data points, the following quantities have been calculated:

a. Determine the least-squares regression line.
b. Determine the standard error of estimate.
c. Construct the 95% confidence interval for the mean of y when x = 7.0.
d. Construct the 95% confidence interval for the mean of y when x = 9.0.
e. Compare the width of the confidence interval obtained in part (c) with that obtained in part (d). Which is wider and why?

2x=40 2y = 76 2xy = 400 Zr2-346 y--| 160 (y-j)2 = 52.334

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