Quiz3b_KEY_Sp11

# Quiz3b_KEY_Sp11 - B Name_KEY 18 February 2011 IE330 Spring...

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

Name: _____________KEY__________________ B 1 18 February 2011 IE330 Spring 2011 Quiz #3b Test statistics 0 12 2 2 0 0 0 1 2 0 0 0 0 0 2 22 0 00 1 1 2 2 *2 1 2 0 0 1 2 0 0 0 0 1 / / (1 ) 11 2 / 1 1 p D p nS X X X np X X Z T Z Z n s n np p nn n S n S X X D X X T T T S Z Sn ss S 0 ˆˆ 1 PP

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

View Full Document
Name: _____________KEY__________________ B 2
Name: _____________KEY__________________ B 3

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

View Full Document
Name: _____________KEY__________________ B 4 1. Which of the following is true about two-sample tests of mean? (Select all that are true.) a. To reject the null hypothesis, the p-value of the test statistic must be less than α/2. b. Whenever the population variances are large, a paired t-test should be run. c. Pooled standard deviation is used whenever the number of observations in each sample is the same. d. None of the above is true. 2. (TRUE or FALSE) A two-sample t-test will result in the same conclusion as a paired t-test as long as the tests are run on the same sample data. 3. (TRUE or FALSE) If our null hypothesis is H 0 : σ 1 = σ 2 , then a statistical test of
This is the end of the preview. Sign up to access the rest of the document.

## This document was uploaded on 09/19/2011.

### Page1 / 4

Quiz3b_KEY_Sp11 - B Name_KEY 18 February 2011 IE330 Spring...

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

View Full Document
Ask a homework question - tutors are online