midterm1_2009_v1

midterm1_2009_v1 - STAT 512 MIDTERM I, FALL 2009 Sep 30th,...

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Sep 30 th , 2009 15 pt total 1. This exam is open-book and open-notes. No computers/phones/wireless communication! 2. Write your full name – I don’t want to deal with anonymous exam takers. 3. Write your solution clearly with intermediate steps instead of just the final answer. 4. Try to answer all the questions. I will not be able to give you partial credit if you do not write anything. 5. Please write legibly. If your handwriting is difficult to read, I will not be able to understand and give you credit. 1. (4pt) Suppose the estimated regression equation is ^ 10 5 X Y = + . If the analysis was rerun with X replaced with U=0.5X+2, give the estimated regression equation 2. (3pt) In a simple linear regression there are two intervals associated with X = 5: (20, 29) and (15, 35). Which is the prediction interval and which is the confidence interval for the mean response at this level of X? Explain you answer. 3.
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This note was uploaded on 02/05/2011 for the course STAT 512 taught by Professor Staff during the Spring '08 term at Purdue University.

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midterm1_2009_v1 - STAT 512 MIDTERM I, FALL 2009 Sep 30th,...

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