Use the data from Problem 14.20 to answer the following questions:
a. Calculate the SST.
b. Partition the SST into the SSR and SSE.
c. Calculate the sample coefficient of determination.
d. Test the significance of the population coefficient of determination using α = 0.05.
In Problem

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GMAT GPA 310 3.7 290 3.0 260 3.1 280 3.2 GMAT GPA 350 4.0 270 3.0 300 3.7 300 3.0