Question: A regression model Y 0 1x1 2x2 3x3 has been fit to a sample of n 25 observations. The calculated t-ratios

A regression model Y 0 1x1 2x2 3x3

has been fit to a sample of n 25 observations. The calculated t-ratios are as follows: for 1, t0 4.82, for 2, t0 8.21 and for 3, t0 0.98.

(a) Find P-values for each of the t-statistics.

(b) Using 0.05, what conclusions can you draw about the regressor x3? Does it seem likely that this regressor contributes significantly to the model?

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