Does studying for an exam pay off? The number of hours studied, x, is compared with the
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a. Complete the preliminary calculations: extensions, five sums, SS(x), SS(y), and SS(xy).
b. Find r.
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9 80 4 90 80 2 60 70
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a x y x xy y 2 80 4 160 6400 5 80 25 400 6400 1 70 1 70 ...View the full answer
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