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One of my colleagues gathered data on the time students spent on a midterm examination and their grade. The X variable is time and the Y variable is examination grade. Calculate r. Use Table A to determine if it is statistically significant.

ΣX = 903
ΣX² = 25,585
ΣXY = 46,885
ΣY = 2079
ΣY² = 107,707
N = 42

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