# problem set 1 answers - Answer key for Part II HW#1 3 57...

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

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

View Full Document
3. 57 For the yearly salaries of all employees, CV= ( ) 100% = (6 ; 820 = 62 ; 350) 100 = 10 : 94% For the years of experience of these employees, CV= ( ) 100% = (2 = 15) 100 = 13 : 33% The relative variation in salaries is lower than that in years of experience. 3. 81 ± = 2 ; 365 = 340 a. i. ± ± = 1 ; 685 2 ; 365 ± k 340 = 1 ; 685 k = 2 1 ± 1 k 2 = 1 ± 1 2 2 = 1 ± : 25 = : 75 or 75% Thus, at least 75% of all homeowners pay a monthly mortgage of \$1,685 to \$3045. a. ii. ± ± = 1 ; 345 2 ; 365 ± k 340 = 1 ; 345 k = 3 1 ± 1 k 2 = 1 ± 1 3 2 = 1 ± : 11 = : 89 or 89% Thus, at least 89% of all homeowners pay a monthly mortgage of \$1,345 to \$5,385. b. 1 ± 1 k 2 = : 84 gives k = 2 : 5 ± ± 2 : 5 = 2 ; 365 ± 2 : 5(340) = \$1 ; 515 ± + 2 : 5 = 2 ; 365 + 2 : 5(340) = \$3 ; 215 Thus, the required interval is \$1,515 to \$3,215. 3. 84

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 4

problem set 1 answers - Answer key for Part II HW#1 3 57...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online