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Quiz4b_KEY_Sp11

# Quiz4b_KEY_Sp11 - B Name_KEY 28 February 2011 IE330 Spring...

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Name: _______________KEY___________________ B 28 February 2011 IE330 Spring 2011 Quiz #4b 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___________________ B 1. (TRUE or FALSE) For a simple linear regression model, the p-value of β 1 is equal to the p-value of β 0 2. 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 = 107.75. What is the value of x 2 ? 107.75 (there is no variance … all values are equal) 3. (TRUE or FALSE) A 90% confidence interval bounds 90% of the population. 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 type of glue. a. Determine the p-values missing from the regression below. You do not have to interpolate – you can state your answer as “< p”, where p is the smallest α in Table IV that is larger than your answer.
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Quiz4b_KEY_Sp11 - B Name_KEY 28 February 2011 IE330 Spring...

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