A researcher is trying to decide whether or not to add another variable to his regression model. He has estimated the following equation for the model from a sample of 28 observations.
= 23.62 + 18.86x1 + 24.72x2
SSE = 1425SSR = 1320?
He has also estimated the model with an additional variable x3. The results are:
= 25.32 + 15.29x1 + 7.63x2 + 12.72x3
SSE = 1350SSR = 1465?
What advice would you give this researcher? Use a .10 level of significance.
What will be an ideal response?
F = 1.33; p-value is greater than .10; do not reject H0; do not include x3
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