Quiz3a_KEY_Sp11

# Quiz3a_KEY_Sp11 - A Name_KEY 18 February 2011 IE330 Spring...

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

Name: ______________KEY____________________ A 1 18 February 2011 IE330 Spring 2011 Quiz #3a 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____________________ A 2
Name: ______________KEY____________________ A 3

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

View Full Document
Name: ______________KEY____________________ A 4 1. (TRUE or FALSE) Pooled standard deviation is used whenever the number of observations in each sample is the same. 2. (TRUE or FALSE) It is possible for a two-sample t-test to come to a different conclusion than a paired t-test. 3. (TRUE or FALSE) If our null hypothesis is H 0 : σ 1 = σ 2 , then a statistical test of this hypothesis involves calculating a test statistic and comparing it against critical values from an F distribution . 4. Which of the following is true about two-sample tests of mean? (Select all that are true.) a. Whenever the sample variance is small, a paired t-test should be run.
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 4

Quiz3a_KEY_Sp11 - A 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