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# q08_sol - ISyE2028A,Fall2010 SolutionstoQuiz8(versionA&B...

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ISyE2028A, Fall 2010 Solutions to Quiz 8 (version A & B) Version A: 1. Which of the following statement is not true if 3 7 y x   ? A. The y intercept is 7 B. y decreases by 3 when x increases by 4 C. y decreases by 3 when x increases by 1 D. The slope of the line is 3 ANSWER: B 2. The simple linear regression model is 0 1 , Y x where is a random variable assumed to be normally distributed with 2 ( ) 0 and ( ) . E V Let x denote a particular value of the independent variable x . Which of the following identities are true regarding the expected or mean value of Y when x x ?

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q08_sol - ISyE2028A,Fall2010 SolutionstoQuiz8(versionA&B...

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