Dorothy Kelly sells life insurance for the Prudence Insurance Company. She sells insurance by making visits to her clients homes. Dorothy believes that the number of sales should depend, to some degree, on the number of visits made. For the past several years, she kept careful records of the number of visits (x) she made each week and the nuthe x and y values follow.Oý=yUSE SALT2 =OO15Σx = 250; Σy = 99; Σx2 = 4,948; Σy2 = 763; Σxy = 1,882(a) Find x, y, b, and the equation of the least-squares line. (Round your answers for x and y to two decimal places. Round your least-squares estimates to three decimal places.)10103y15(b) Draw a scatter diagram for the data. Plot the least-squares line on your scatter diagram.yy1021 171255137101028 58215152020 146202522 7833025 30155O29 8 25 1610 6 1010Ex15105 1051015 2015 2025 302530(c) Find the sample correlation coefficient r and the coefficient of determination. (Round your answers to three decimal places.)What percentage of variation in y is explained by the least-squares model? (Round your answer to one decimal place.)%(d) In a week during which Dorothy makes 23 visits, how many people do you predict will buy insurance from her? (Round your answer to one decimal place.)people

Given ∑x=250, ∑y=99, ∑x2=4948, ∑y2=763, ∑xy=1882

Answered: داد *** 9m 10 21 17 13 28 5 20 r- : 7 7…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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