f98exm1a - COURSE: MSCI 3710 EXAM 1 Version A Fall 1998...

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

View Full Document Right Arrow Icon
COURSE: MSCI 3710 Print Name: EXAM 1 Signature: Version A S.S.#: Fall 1998 Seat Number: Note: Whenever question(s) are connected you may be asked to assume a result (given a value) from the previous question but this result may or may not be correct. This is to prevent you from losing points on a second question because you made a mistake on a previous question. Information given in the paragraph below to answer the next four questions. The personnel manager of Acme Inc. wishes to determine if the productivity of employees (measured on some continuous scale) at its Denver plant is any different from the productivity at its New York plant. Random samples of employees in Denver and New York are selected, and the productivity scores at each plant are recorded. The following results are obtained. Denver (1 ) New York (2) 16.3 18.3 s 1.94 2.25 n 14 17 1. Assuming the variance in the productivity scores of all employees at the Denver plant is equal to that for all employees at the New York plant, what is the pooled variance? A. 4.48 B. 2.12 C. 2.095 D. 5.45 E. 2.90 2. Assuming the variance in the productivity scores of all employees at the Denver plant is equal to that for all employees at the New York plant, what is the absolute value of the calculated test statistic for testing whether productivity scores are any different A. 1.052 B. 2.212 C. 1.711 D. 4.258 E. 2.618 3. Suppose the absolute value of the test statistic in question #2 is calculated to be 1.74 . Which one of the following would best describe the p-value of the test? A. .05 < p < .10
Background image of page 1

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

View Full DocumentRight Arrow Icon
B. .02 < p < .04 C. p = .0409 D. .005 < p < .01 E. .025 < p < .05
Background image of page 2
4. If the p-value in question #3 were relatively large (p >.10) which of the following would you expect of the 90% confidence interval for μ 1 - μ 2 ? A. The confidence interval is entirely less than zero leading to the conclusion μ 1 < μ 2 . B. The confidence interval is entirely greater than zero leading to the conclusion μ 1 > μ 2 . C. The confidence interval is entirely greater than zero leading to the conclusion μ 1 = μ 2 D. The confidence interval is entirely less than zero leading to the conclusion μ 1 > μ 2 . E. The confidence interval contains zero leading to the conclusion μ 1 = μ 2 . Use the information given in the paragraph below to answer the next three questions. According to an article in the COBA Business Review, the average price of a “steak lunch” in Moscow is more than twice the average price in Dallas. An economist interested in differences in the economies of Russia and the United States wishes to test whether the average price of a steak lunch in Dallas is cheaper than the average price in Moscow by more than $10. A random sample of steak lunch prices from both cities resulted in the following information. Moscow (1)
Background image of page 3

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

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/09/2011 for the course DSCI 3710 taught by Professor Dr.jay during the Spring '08 term at North Texas.

Page1 / 9

f98exm1a - COURSE: MSCI 3710 EXAM 1 Version A Fall 1998...

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

View Full Document Right Arrow Icon
Ask a homework question - tutors are online