Question

In fitting a least squares line to n = 15 data points, the following quantities were computed: SSxx = 55, SSyy = 198, SSxy = -88, x̄ = 1.3, and y-bar = 35.
a. Find the least squares line.
b. Graph the least squares line.
c. Calculate SSE.
d. Calculate s2.
e. Find a 90% confidence interval for β1. Interpret this estimate.
f. Find a 90% confidence interval for the mean value of y when x = 15.
g. Find a 90% prediction interval for y when x = 15.


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  • CreatedMay 20, 2015
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