Complete parts, given Σx = 372, Σy = 113,Σx2 = 24814, Σy2 = 3371,Σxy = 8371, and r ≈ 0.926.
a) Verify the given sums Σx, Σy,Σx2, Σy2, Σxy, andthe value of the sample correlation coefficient r. (Roundyour value for r to three decimal places.)
| Σx = | |
| Σy = | |
| Σx2 = | |
| Σy2 = | |
| Σxy = | |
| r = | |
b) Find x, and y. Then find the equation of the least-squaresline  = a + bx. (Round your answers forx and y to two decimal places. Round your answers for aand b to three decimal places.)
c) Find the value of the coefficient of determinationr2. What percentage of the variation iny can be explained by the corresponding variationin x and the least-squares line? What percentage isunexplained? (Round your answer for r2to three decimal places. Round your answers for the percentages toone decimal place.)
| r2 = | ___ |
| explained    | ___% |
| unexplained    | ___% |
d) Predict the percentage of all fatal accidents due to failing toyield the right of way for 70-year-olds. (Round your answer to twodecimal places.)
_____ %
