Mr. James McWhinney, president of Daniel-James Financial Services, believes there is a relationship between the number of clientcontacts and the dollar amount of sales. To document this assertion, Mr. McWhinney gathered the following sample information. The xcolumn indicates the number of client contacts last month and the y column shows the value of sales ($ thousands) last month for eachclient sampled.Sales ($thousands), yNumber ofSales ($Contacts,X thousands),yNumber ofContacts,x142423301214489020285085163055120468050110E Click here for the Excel Data Filea. Determine the regression equation. (Negative amounts should be indicated by a minus sign. Do not round intermediatecalculations. Round final answers to 2 decimal places.)(x – 7)(у — )(x – a3(y – ) (x – ¤) (y – 9)14376.361376.41719.741214-21.4-47.120-13.4179.56443.541630-31.1967.214612.6357.2123-10.4967.21489028.9213.16421.94508523.9275.56396.7455466.563469.211,272.2450110.016.648.9T =YSx =Sy =r =b = a =ý =b. Determine the estimated sales if 40 contacts are made. (Do not round intermediate calculations. Round final answers to 2decimal places.)The estimated sales

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Description: Mr. James McWhinney, president of Daniel-James Financial Services, believes there is a relationship between the number of clientcontacts and the dollar amount of sales. To document this assertion, Mr. McWhinney gathered the following sample informat

Given: x y 14 24 12 14 20 28 16 30 46 80 23 30 48 90 50 85 55 120 50 110Calculation: (a) x y (x-x) (y-y) (x-x)2 (y-y)2 (x-x)(y-y) 14 24 -19.4 -37.1 376.36 1376.41 719.74 12 14 -21.4 -47.1 457.96 2218.41 1007.94 20 28 -13.4 -33.1 179.56 1095.61 443.54 16 30 -17.4 -31.1 302.76 967.21 541.14 46 80 12.6 18.9 158.76 357.21 238.14 23 30 -10.4 -31.1 108.16 967.21 323.44 48 90 14.6 28.9 213.16 835.21 421.94 50 85 16.6 23.9 275.56 571.21 396.74 55 120 21.6 58.9 466.56 3469.21 1272.24 50 110 16.6 48.9 275.56 2391.21 811.74 Total=334 611 2814.4 14248.9 6176.6 Average=33.4 61.1 x=∑xn=33410=33.4y=∑yn=61110=61.1 Sx=∑x-x2n-1=2814.410-1=17.6836≈17.68 Sy=∑y-y2n-1=14248.910-1=39.7896≈39.79 r=∑x-xy-y∑x-x2∑y-y2=6176.62814.4×14248.9=0.9754≈0.98 b=rSySx=0.9754×39.789617.6836=2.1947≈2.19 a=y-b.x=61.1-2.1947×33.4=61.1-73.30298=-12.20298=-12.20 y^=a+bx=-12.20+2.19x (b) Estimated sales for the x=40 y^=a+bxy^=-12.20+2.19x=-12.50+2.1940=-12.50+87.6=75.1

Math

Statistics

Mr. James McWhinney, president of Daniel-James Financial Services, believes there is a relationship between the number of client contacts and the dollar amount of sales. To document this assertion, Mr. McWhinney gathered the following sample information. The x column indicates the number of client contacts last month and the y column shows the value of sales ($ thousands) last month for each client sampled. Sales ($ Contacts,X thousands), y Number of Contacts,x Sales ($ thousands), y Number of 14 24 23 30 12 14 48 90 20 28 50 85 16 30 55 120 46 80 50 110 S Click here for the Excel Data File a. Determine the regression equation. (Negative amounts should be indicated by a minus sign. Do not round intermediate calculations. Round final answers to 2 decimal places.) (x - 2) (y (x – a (y – D (æ – ¤) (y – 9) | y 14 376.36 1376.41 719.74 12 14 -21.4 -47.1 20 -13.4 179.56 443.54 16 30 -31.1 967.21 46 12.6 357.21 23 -10.4 967.21 48 90 28.9 213.16 421.94 50 85 23.9 275.56 396.74 55 466.56 3469.21 1,272.24 50 110.0 16.6 48.9 T = y = Sx = Sy = r = b =

Mr. James McWhinney, president of Daniel-James Financial Services, believes there is a relationship between the number of client contacts and the dollar amount of sales. To document this assertion, Mr. McWhinney gathered the following sample information. The x column indicates the number of client contacts last month and the y column shows the value of sales ($ thousands) last month for each client sampled. Sales ($ Contacts,X thousands), y Number of Contacts,x Sales ($ thousands), y Number of 14 24 23 30 12 14 48 90 20 28 50 85 16 30 55 120 46 80 50 110 S Click here for the Excel Data File a. Determine the regression equation. (Negative amounts should be indicated by a minus sign. Do not round intermediate calculations. Round final answers to 2 decimal places.) (x - 2) (y (x – a (y – D (æ – ¤) (y – 9) | y 14 376.36 1376.41 719.74 12 14 -21.4 -47.1 20 -13.4 179.56 443.54 16 30 -31.1 967.21 46 12.6 357.21 23 -10.4 967.21 48 90 28.9 213.16 421.94 50 85 23.9 275.56 396.74 55 466.56 3469.21 1,272.24 50 110.0 16.6 48.9 T = y = Sx = Sy = r = b =

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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