Linear Prog COP4355_Part_30

Linear Prog COP4355_Part_30 - Chapter 11 Forecasting 124...

Info icon This preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
124 Chapter 11 Forecasting 11.20 (continued) (d) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) 2 2 2 2 10 3650 - 65 525 R = 10 505 65 10 29625 525 5,640,625 = = 0.331 825 20,625 R = 0.331 = 0.576     (e) ( ) ˆ Y = 33.788 + 2.879 14 = 74.091 (f) No, the independent variable (X) accounts for only 33.1% of the variation in Y, therefore the forecast is not accurate. 11.21 (a) 0 500 1000 1500 2000 2500 3000 3500 4000 4500 0 10 20 30 40 50 60 Age Monthly Income
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Solutions Manual and Workbook 125 11.21 (continued) (b) X Y XY X 2 Y 2 29 1200 34800 841 1440000 44 2600 114400 1936 6760000 27 1000 27000 729 1000000 29 1400 40600 841 1960000 37 2700 99900 1369 7290000 31 2200 68200 961 4840000 41 3500 143500 1681 1225000 54 4000 216000 2916 1600000 36 3100 111600 1296 9610000 27 1600 43200 729 2560000 30 1900 57000 900 3610000 43 3700 159100 1849 1369000 428 28900 1115300 16048 81010000 ( ) ( ) ( ) ( ) ( ) ( ) ( ) 2 428 28900 X = = 35.67 Y = = 2408.33 12 12 1115300 - 12 35.67 2408.33 b = = 108.28 16048 - 12 35.67 a = 2408.33 - 108.28 35.67 = -1454 (c) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) 2 2 2 2 2 8 12 1115300 - 428 28900 R = 12 16048 428 12 81010000 28900 1014400 = = 0.8 9392 1.3691 x 10 R = 0.8 = 0.894     80% of the variation in monthly income is explained by the variation in age.
Image of page 2
126 Chapter 11 Forecasting 11.21 (continued)
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern