classtest_sem_1_2015_2016_soln.doc

# classtest_sem_1_2015_2016_soln.doc

This preview shows pages 1–3. Sign up to view the full content.

THE UNIVERSITY OF HONG KONG DEPARTMENT OF STATISTICS AND ACTUARIAL SCIENCE STAT0302/1602 Business Statistics Sem 1, 2015/2016 CLASS TEST – ANSWERS 1. S=spade , A = ace 13 4 52 16 52 1 52 4 52 13 ) ( A S P ANSWER: C 2. Stem and leaf display 1. 70 11 81 Range CORRECT II . 46 2 47 45 ) 10 9 ( 2 1 scores Median th th CORRECT III . 3 2 45 Mean NOT 47 INCORRECT Only I and II CORRECT ANSWER: D 3. x 1 2 3 4 total p(x) 0.25 0.50 0.15 0.10 1 1 . 2 , 89 . 0 888819441 . 0 , 79 . 0 2 ANSWER: D 4 . x 0 1 2 3 Total 1

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

View Full Document
p(x) 2k 3k 13k 2k 1 0.10 0.15 0.65 0.10 1 05 . 0 1 20 1 2 13 3 2 k k k k k k 25 . 0 15 . 0 10 . 0 ) 2 ( X P ANSWER: B 5 . Let X = the number of defectives 4096 19 4 1 3 6 ) 25 . 0 ( 6 6 ) 75 . 0 ( ) 25 . 0 ( 5 6 ) 5 ( ) 25 . 0 , 6 ( ~ 6 6 5 X P p n Bin X ANSWER: E 6 . Let X = achievement test score ) 100 , 850 ( ~ 2 2 X X N X 18406 . 0 31594 . 0 5 . 0 ) 9 . 0 ( ) 100 850 940 ( ) 940 ( Z P Z P X P 0.50 0.31594 0.18406 < | | > X 850 940 < | | > Z 0 0.9 ANSWER: B 7.
This is the end of the preview. Sign up to access the rest of the document.

{[ 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