PracticeFinalExam

# PracticeFinalExam - STAT 350 Practice Final Exam April 24...

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

STAT 350 Practice Final Exam April 24, Spring 2011 NAME (print): Class Time (circle one): 1:30 PM 2:30 PM Instructions: You are expected to uphold The Honor Code of Purdue University. It is your responsibility to keep your work covered at all times. Anyone caught cheating in the final exam will automatically fail the course. You may have only THREE one-sided 8x11 crib sheet with notes handwritten in your own hand- writing to take this test. Please show ALL your work. Most questions are graded WITH partial credit, and an answer without showing any work may result in zero credit. After you complete the exam, please turn in your exam to your instructor, and sign the roster. 1

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

View Full Document
Question Score max 1 5 2 5 3 5 4 20 5 20 6 15 7 30 8 10 total 110 / 100 . 2
1 (5 points) Consider the set of points { ( - 2 , 5) , ( - 3 , 7) , ( - 4 , 9) , ( - 5 , 11) , ( - 10 , n ) } . What should n be so that the correlation between the x- and y-values is -1? 2. (5 points) Let X denote the number of customers who enter a bank in an hour. Suppose X has a Poisson distribution, and that P ( X = 0) = 0 . 05 . What is the average number of customers entering this bank in one hour? 3. (5 points) In a study of high school students, a positive correlation was found between hours spent per week doing homework, and scores on standardized achievement tests. In fact the correlation

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 ]}

### 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