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Unformatted text preview: From here on out, we don't worry about the original X i 's and Y i 's! All we need are the D i 's. (Of course, for the sake of computing , simply take . However, the D i 's are still needed for EDA and for computing s D 2 if is unknown.) So, a 100(1)% C.I. for is depending on whether z is known? z is normal? (CLT?) z D i 's are normal? Q: How to check normality in practice??? FACT: Page 3 of 4 No Title 3/26/2011 http://www.stat.sfu.ca/~sgchiu/Grace/S330/handouts/paired/ Making conclusions: If the 100(1)% C.I. for does not contain 0, then we are quite confident that the siblings' IQ's are different (i.e. 0). Depending on wether 0 is to the left or right of the C.I., we get a sense of which sibling is more intelligent. A formal onesided hypothesis test can be conducted to determine if the first borns have higher IQ's than their second born siblings. Grace Chiu 20000817 Page 4 of 4 No Title 3/26/2011 http://www.stat.sfu.ca/~sgchiu/Grace/S330/handouts/paired/...
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This note was uploaded on 01/23/2012 for the course STAT 201 taught by Professor Staff during the Fall '03 term at Simon Fraser.
 Fall '03
 STaff

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