# 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

https://brainmass.com/statistics/hypothesis-testing/least-squares-fitting-122296

#### 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.

$2.19