{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

statsexam3s09a

# statsexam3s09a - Economic Statistics Exam 3a Spring 2009...

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

Economic Statistics Exam 3a Last name: Spring 2009 First name: PPID: Section number: Please sign that you abide by the honor pledge: This exam contains twenty short answer questions ( worth 6 points each ) and four long answer questions ( worth 15 points each ) . Show your work clearly to be eligible for partial credit. In all problems where you need to make a calculation, simplify your answer as much as convenient. In questions with multiple parts, you should respond as if your answers to previous parts were correct. Some PDFs: Some probabilities: f ( x ) = 1 2 !" 2 e # ( X # μ ) 2 " 2 P [ x ! a ] = e " # a f ( x ) = 1 u ! ! P [ X ] = μ x e ! μ X ! f ( x ) = ! e " ! x P [ X ] = N ! X !( N ! X )! p X (1 ! p ) N ! X Short Questions ( 6 points apiece ) 1. When testing a hypothesis, there are two mistakes we can make. Name and explain these errors. 2. What is “unobserved heterogeneity”?

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

View Full Document
Econ 400 Exam 3, page 2 of 10. 3. Explain how to calculate the “correlation coefficient”. 4. According to my best calculations, there is a 0.20 chance that modern civilization collapses in the next year, a 0.30 chance that the current swine flu goes pandemic, and a 0.15 chance of both. What is the chance that neither disaster occurs? 5. Given that the swine flu pandemic happens, what is the chance that civilization collapses? 6. Construct a box - and - whisker plot with these numbers: 1,1,2,3,5,8,13,21,34,55,89,144,233,377,610,987,1597 7. The National Weather Service gives us a 0.10 chance of rain on each of the seven days in the next week. If these events are independent, what is the chance that we have rain in the next week?
Econ 400 Exam 3, page 3 of 10. 8. The random variable X is distributed normally with mean of 13 and variance of 9 .

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 / 10

statsexam3s09a - Economic Statistics Exam 3a Spring 2009...

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

View Full Document
Ask a homework question - tutors are online