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Unformatted text preview: q s 2 [1 + z ( Z Z )1 z ], which is approximately 73 . 18 ± 6 . 98. [The calculation shows that ( Z Z )1 matrix might have some rounding errors.] 4. You may use Section 6.2 to solve this problem. E±ectively, we are concerned with μ 1μ 2 = (1 ,1) μ . The result of page 279 applies with C = (1 ,1) and q = 2. Alternatively, let ¯ d = ¯ x 1¯ x 2 . Then, Var( ¯ d ) = 1 n [Var( x 1 ) + Var( x 2 ) + 2Cov( x 1 , x 2 )], where x i denotes the ith index. You can apply the usual ttest for the ¯ d . Here ¯ d =4 . 3 and Var( ¯ d ) = 1.42. The tratio is3 . 61, which is signi²cant at the 5% level....
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This note was uploaded on 12/16/2011 for the course STAT 5705 taught by Professor Staff during the Fall '09 term at FSU.
 Fall '09
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