Quiz2a_KEY_Sp11

# Quiz2a_KEY_Sp11 - Name_KEY 4 February 2011 IE330 Spring...

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Name: ________________KEY____________________________ 4 February 2011 IE330 Spring 2011 Quiz #2a Confidence intervals ( 29 ( 29 2 2 2 /2 /2, 1 /2 2 2 /2, 1 1 /2, 1 1 1 ˆ ˆ (1- ) ˆ / n / n n n n n s n s p p x z x t s p z n α σ - - - - - - ± ± ± Χ Χ Single sample tests ( 29 0 2 2 0 0 0 0 0 0 2 0 0 0 1 / / (1 ) n S X X X np Z T Z n s n np p μ χ - - - - = = = = - 1

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Name: ________________KEY____________________________ 1. (10 points) (TRUE or FALSE) All else being equal, a confidence interval computed from a sample with more observations will be wider than one computed from a sample with fewer observations. 2. (10 points) The z-table allows you to identify values corresponding to an integration of what type of distribution? a. Standard normal b. Normal c. Chi-squared d. Binomial e. None of the above 3. (10 points) In order to use /2, 1 / n n x t s α - ± to compute a confidence interval on
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Quiz2a_KEY_Sp11 - Name_KEY 4 February 2011 IE330 Spring...

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