A multiple regression model, K = a + bX + cY + dZ, is estimated regression software, which produces the following output:   a. Are the estimates of a, b, c, and d statistically significant at the 1 percent significance level? b. How much of the total variation is explained by this regression equation? c. Is the overall regression equation statistically significant at the 1 percent level of significance? d. If X equals 50, Y equals 200, and Z equals 45, what value do you predict K will take?

Q: 80 75 70 65 60- 55 50 10 20 30 40 X x 50 60 70

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