I Y 4 10 7 15 10 18 12 20 Use least squares regression to fit a parabola. Compute the coefficient of determination. Round-off all computations to 4 decimal places. 16 25 19 38 22 40 2 47

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A: Given that  Sample sizes n1=81 , n2=77 Sample means y1=40 , y2=50 Standard deviation s1=21 , s2=19

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A: Given that  Sample sizes n1=81 , n2=77 Sample means y1=40 , n2=50 s1=21, s2=19