MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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A professor obtains SAT scores and freshman grade point averages (GPAs) for a group of n = 15 college students. The SAT scores have a mean of M = 580 with SS = 22,400, and the GPAs have a mean of 3.10 with SS = 1.26, and SP = 84.
- Find the regression equation for predicting GPA from SAT scores.
- What percentage of the variance in GPAs is accounted for by the regression equation? (Compute the
correlation r, then find r^2.) - Does the regression equation account for a significant portion of the variance in GPA? Use α = .05 to evaluate the F-ratio.
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