Quiz3c_KEY_Sp11

# Quiz3c_KEY_Sp11 - C Name_KEY 18 February 2011 IE330 Spring...

This preview shows pages 1–5. Sign up to view the full content.

Name: ______________KEY_____________________ C 1 18 February 2011 IE330 Spring 2011 Quiz #3c 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_____________________ C 2
Name: ______________KEY_____________________ C 3

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

View Full Document
Name: ______________KEY_____________________ C 4 1. (TRUE or FALSE) If the population standard deviations are not known but are equal, pooled standard deviation should be used. 2. (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 a T distribution . 3. Which of the following is true about two-sample tests of mean? (Select all that are true.) a. If the test statistic is greater than α, we should fail to reject the null hypothesis. b. A one-sample t-test on the differences between paired observations from two samples will result in the same conclusion as a paired t-test as long as the tests are run on the same sample data.
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 5

Quiz3c_KEY_Sp11 - C Name_KEY 18 February 2011 IE330 Spring...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online