Question: In problem 13.7 on page 510, you used GDP per capita and CPI to estimate the percentage of very happy people in a country. Using

In problem 13.7 on page 510, you used GDP per capita and CPI to estimate the percentage of very happy people in a country. Using the computer output from that problem:

a. At the 0.05 level of significance, determine whether each independent variable makes a significant contribution to the regression model. On the basis of these results, indicate the most appropriate regression model for this set of data.

b. Calculate the coefficients of partial determination, R2 Y1.2 and R2 Y2.1, and interpret their meaning.

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