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Quiz4a_KEY_Sp11

# Quiz4a_KEY_Sp11 - A Name_KEY 28 February 2011 IE330 Spring...

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Name: ________________KEY____________________ A 28 February 2011 IE330 Spring 2011 Quiz #4a Test statistics ( 29 ( 29 ( 29 0 1 2 1 2 2 2 0 0 0 1 2 0 0 0 0 0 2 2 2 0 0 0 1 2 2 2 1 1 2 2 * 2 1 2 0 0 1 2 0 0 0 0 2 2 1 2 1 2 1 2 1 / / (1 ) 1 1 2 / 1 1 p D p n S X X X np X X Z T Z Z n s n np p n n n S n S X X D X X T T T S Z n n S n s s S n n n n μ μ χ σ σ σ σ - - - - - - ∆ = = = = = - + - + - - - ∆ - ∆ - - ∆ = = = = + - + + ( 29 1 2 0 1 2 ˆ ˆ 1 1 ˆ ˆ 1 P P P P n n - = - + 1

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Name: ________________KEY____________________ A 1. ( TRUE or FALSE) A 90% tolerance interval bounds 90% of the population. 2. ( TRUE or FALSE) For a simple linear regression model, we cannot use the model if the p-value for the regression coefficient is greater than 0.05. 3. Suppose that for a particular set of data x 1 , x 2 , x 3 , the sample variance is s 2 = 0 and the sample mean is x = 2.44. What is a 95% confidence interval on the mean? (2.44, 2.44) – there is no variance in the sample. 4. Consider the following regression, where 30 samples were taken to determine the strength of a bond between two beams for a given concentration of a compound in a particular brand of glue. a. Determine the p-values missing from the regression below. You do not need to interpolate – you can state your answer as “< p”, where p is the
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Quiz4a_KEY_Sp11 - A Name_KEY 28 February 2011 IE330 Spring...

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