Quiz3c_KEY_Sp11

Quiz3c_KEY_Sp11 - C Name: _KEY_ 18 February 2011 IE330...

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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
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Name: ______________KEY_____________________ C 2
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Name: ______________KEY_____________________ C 3
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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.
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Quiz3c_KEY_Sp11 - C Name: _KEY_ 18 February 2011 IE330...

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