(c) Find E, and ;. Then find the equation nfthe leastsquares line 5? = a + bx. (Round your answers to four decimal places.) _ = 32.5? x = x = 0.?42 X + 0.616 X x WWI): (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 leastsquares line? what percentage is unexplained? (Round your answer for r2 to four decimal places. Round your answers for the percentages to two decimal place.) ,2 : x explained x are unexplained x % (f) Fora neighborhood with x = 39 hundred jobs, how many are predicted to be entry level jobs? [Round your answer to two decimal places.) \f(c) Find x, and y. Then find the equation of the least-squares line y = a + bx. (Round your answers to four decimal places.) = 15.5 X = 103.6667 X V = 32.7920 X + 4.5726 X X(e) Find the value of the coefcient 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.) 2 : 0.9930 x explained : % unexplained x 'a (f) The calves you want to buy are 17 weeks old. What does the least-squares line predict for a healthy weight? (Round your answer to two decimal places.) 105.95 3' kg 5. [0.08103 Points] PREVIOUS ANSWERS BBUNDERSTAT129.2.008.S. ASK YOURTEACHER PRACTICE ANOTHER You are the foreman of the Bares cattle ranch in Colorado. A neighboring ranch has calves for sale, and you are going to buy some calves to add to the Bares herd. How much should a healthy calf weigh? Let x be the age of the calf {in weeks), and let y be the weight of the calf (in kilograms). :1\"; l 4 B 16 26 36 ['1144 51 7a 100 150 200 m USE SA Complete parts (a) through (e), given Ex = 91, By = 615, 2x2 = 2309.312 = 51,937, Exy = 13,508, and rx 0.9978. (c) Find E, and If. Then find the equation Of the leastsquares line p? = a + bx. [Round your answers to four decimal places.) (e) Find the value of the coefcient of determination r2. What percentage of the variation in y can be explained by the corresponding variation in x and the leastesquares 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 = 0.878 x exeleened x n unexplained x en (f) Suppose a car weighs x : 39 (hundred pounds). what does the leastsquares line forecast for y : miles per gallon? (Round your answer to two decimal places.) _x nee 6. [0.07/0.3 Points] DETAILS PREVIOUS ANSWERS BBUNDERSTAT12 9.2.009.MI.S. MY NOTES ASK YOUR TEACHER PRA Do heavier cars really use more gasoline? Suppose a car is chosen at random. Let x be the weight of the car (in hundreds of pounds), and let y be the miles per gallon (mpg). X 29 46 33 47 23 40 34 52 y 28 19 26 13 29 17 21 14 In USE SALT Complete parts (a) through (e), given Ex = 304, Ey = 167, Ex
