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Least Squares Fitting

In fitting a least squares line to n=15 data points, the following quantities were computed: SSxx=55, SSyy=198, SSxy=-88, x-bar=1.3, and y-bar=35.

Determined the following:
y=B0+B1X
y=37.08-1.6X
SSE=57.2
S squared = 4.4

1. Find 90% confidence interval for B1/Interpret answer
2. Find 90% prediction interval for Y when x=15

Solution Preview

1. -1.6 +/- t(0.05,13) *2.09

-1.6 +/- 2.1604*2.09 = [-6.1152 , ...

Solution Summary

The solution finds the confidence interval and prediction interval for the regression produced by least squares.

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