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.
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.