# Regression Analysis

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Please solve the exercise below:

Consider the following partial computer output for a multiple regression model.

Predictor Coefficient Standard Deviation

Constant 41.225 6.380

X1 1.081 1.353

X2 -18.404 4.547

Analysis of Variance

Source DF SS

Regression 2 2270.11

Error 26 3585.75

What is the number of observations in the sample?

Write the least squares regression (prediction) equation. Test the usefulness of variable x2 in the model at alpha =.05. Calculate the t statistic and state your conclusions.

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#### Solution Summary

The solution provides step by step method for the calculation of regression analysis. Formula for the calculation and Interpretations of the results are also included.

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