The following ANOVA table was obtained when estimating a multiple linear regression model.

a. How many explanatory variables were specified in the model? How many observations were used?
b. Specify the hypotheses to determine whether the explanatory variables are jointly significant.
c. Compute the value of the test statistic.
d. At the 5% significance level, what is the conclusion to the test?Explain.

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MS F Significance F ANOVA Regression 2 22016.75 11008.38 Residua 17 39286.93 2310.996 Total df SS 0.0228 19 61303.68