ch12 e SOLUTION.doc

# ch12 e SOLUTION.doc - Chapter 12 Simple Regression and...

• 8

This preview shows page 1 - 3 out of 8 pages.

Chapter 12: Simple Regression and Correlation Analysis 1 Chapter 12 Simple Regression and Correlation Analysis Ans. Not Included of Que No. 12.9, 12.18, 12.28, 12.36 12.1 x = 80 x 2 = 1,148 y = 69 y 2 = 815 xy = 624 n = 7 r =   n y y n x x n y x xy 2 2 2 2 ) ( ) ( = 7 ) 69 ( 815 7 ) 80 ( 148 , 1 7 ) 69 )( 80 ( 624 2 2 = ) 857 . 134 )( 714 . 233 ( 571 . 164 = r = 533 . 177 571 . 164 = -0.927 12.2 x = 1,087 x 2 = 322,345 y = 2,032 y 2 = 878,686 xy = 507,509 n = 5 r =   n y y n x x n y x xy 2 2 2 2 ) ( ) ( = 5 ) 032 , 2 ( 686 , 878 5 ) 087 , 1 ( 345 , 322 5 ) 032 , 2 )( 087 , 1 ( 509 , 507 2 2 = r = ) 2 . 881 , 52 )( 2 . 031 , 86 ( 2 . 752 , 65 = 5 . 449 , 67 2 . 752 , 65 = .975 12.3 x = 302.2 y = 96.5 xy = 4,870.11 x 2 = 15,259.62 y 2 = 1,557.91 n =6 r =   n y y n x x n y x xy 2 2 2 2 ) ( ) ( = 6 ) 5 . 96 ( 91 . 557 , 1 6 ) 2 . 302 ( 62 . 259 , 15 6 ) 5 . 96 )( 2 . 302 ( 11 . 870 , 4 2 2 = .6445 12.4 x = 6,087 x 2 = 6,796,149 y = 1,050 y 2 = 194,526 xy = 1,130,483 n = 9 r =   n y y n x x n y x xy 2 2 2 2 ) ( ) ( = 9 ) 050 , 1 ( 526 , 194 9 ) 087 , 6 ( 149 , 796 , 6 9 ) 050 , 1 )( 087 , 6 ( 483 , 130 , 1 2 2 = r = ) 026 , 72 )( 308 , 679 , 2 ( 333 , 420 = 705 . 294 , 439 333 , 420 = .957 12.5 Correlation between Year 1 and Year 2: x = 17.09 x 2 = 58.7911 y = 15.12 y 2 = 41.7054 xy = 48.97 n = 8 r =   n y y n x x n y x xy 2 2 2 2 ) ( ) ( = 8 ) 12 . 15 ( 7054 . 41 8 ) 09 . 17 ( 7911 . 58 8 ) 12 . 15 )( 09 . 17 ( 97 . 48 2 2 = r = ) 1286 . 13 )( 28259 . 22 ( 6699 . 16 = 1038 . 17 6699 . 16 = .975 Correlation between Year 2 and Year 3:

Subscribe to view the full document.

Chapter 13: Simple Regression and Correlation Analysis 2 x = 15.12 x 2 = 41.7054 y = 15.86 y 2 = 42.0396 xy = 41.5934 n = 8 r =  
You've reached the end of this preview.

{[ snackBarMessage ]}

### What students are saying

• 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.

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

• 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.

Dana University of Pennsylvania ‘17, Course Hero Intern

• 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.

Jill Tulane University ‘16, Course Hero Intern