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CHAPTER 13: LINEAR REGRESSION (25 points) You are hired by the Somewhere Speings City Council to determine if there is a relationship between the number of Patrol Cars on the 1-25 corridor (in the city undaries) and the number of speeding tickets issued. A question was raised. If we set the number of patrol cars to 1p how many tickets would we expect to w Using Linear Regression in Chap 13, answer the question with a spreudsheet printout. Be sure to show ALL formulas and work. A graph is necessary. Patrol Speeding cars Tickets on 1:25 Issued 13 15 12

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Answer #1

a) scatter diagram:

y 19.12 1.743 x 18 16 14 12 10 10

b) Least Square regression equation

Find X .Y and X2 as it was done in the table below X .Y 65 45 42 36 52 X-X 13 25 15 36 12 13 54 36 40 Find the sum of every cc) When X = 10

\widehat{Y} =19.12-1.743*10 = 1.69

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