A researcher surveyed n = 13 students about the number of hours they spent in the library weekly (x) and the GPA (y) for the semester. The summary data are given as follows. x = 14.33, ỹ = 2.72, Ex² = 2986+ Ey? = 100 +2 10 Exy = 540 + 10 (i) Fit a simple linear regression between x and y. (ii) Compute the coefficient of determination and interpret it in this context. (iii) Estimate the weekly hour spent in the library for a GPA of 3.80.

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