x17273747576777y362620121075
Σx = 329, Σy = 116, Σx2 = 18,263, Σy2 = 2690, Σxy = 4042, and r ≈ −0.9617.
(a) Draw a scatter diagram displaying the data.(b) Verify the given sums Σx, Σy, Σx2, Σy2, Σxy and the value of the sample correlation coefficient r. (Round your value for r to four decimal places.)Σx= Σy= Σx2= Σy2= Σxy= r= Find x, and y. Then find the equation of the least-squares line = a + bx. (Round your answer to four decimal places.)x= y= = + x
(a) Draw a scatter diagram displaying the data.
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(e) Find the value of the coefficient of determination r2. What percentage of the variation in y can be explained by the corresponding variation in x and the least-squares line? What percentage is unexplained? (Round your answer for r2 to four decimal places. Round your answers for the percentages to two decimal place.)r2 = explained % unexplained % (f) Predict the percentage of all fatal accidents due to speeding for 25-year-olds. (Round your answer to two decimal places.) %
O Yaw of dienst to pred per tal com due to peeting BS 13 Na na there toplotthont ( pont on the 03 2 56 o y percentage landen due to speed 8 TO 5 Riya 0 of accidents duen pedig .
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