The books Web site (wvvw stat ufl edu frac14 aa cda cda html) has a 3 Atilde 4 Atilde 4 table that cross classifies dumping severity (Y) and operation (X) for four hospitals (H) The four operations refer to treatments for duodenal ulcer patients and have a natural ordering Dumping severity describes a possible undesirable side effect of the operation Its three categories are also ordered a Table 7 22 shows results of generalized CMH tests Interpret, explaining how one test can be much more significant than the others b Let x i i Fit the model logit P(Y curren j H h, X i) Icirc plusmn j micro h Icirc sup2 x i Test conditional independence of X and Y using it, and interpret Icirc sup2 Igrave Which generalized CMH test has the same spirit as this c Does an improved fit result from allowing the operation effect to vary by hospital Interpret Table 7 22 Summary Statistics for dumping by operate Controlling for hospital Alternative Hypothesis DF Value Statistic Prob Nonzero Correlation 6 3404 0 0118 Row Mean Scores Differ General Association 0 0862 0 1016 6 5901 10 5983

Question

The books Web site (wvvw stat ufl edu   frac14 aa cda cda html) has a 3  Atilde  4  Atilde  4 table that cross classifies dumping severity (Y) and operation (X) for four hospitals (H)  The four operations refer to treatments for duodenal ulcer patients and have a natural ordering  Dumping severity describes a possible undesirable side effect of the operation  Its three categories are also ordered  a  Table 7 22 shows results of generalized CMH tests  Interpret, explaining how one test can be much more significant than the others  b  Let  x i   i   Fit the model logit P(Y  curren  j   H   h, X   i)     Icirc  plusmn  j    micro  h    Icirc  sup2 x i   Test conditional independence of X and Y using it, and interpret  Icirc  sup2  Igrave   Which generalized CMH test has the same spirit as this  c  Does an improved fit result from allowing the operation effect to vary by hospital  Interpret  Table 7 22  Summary Statistics for dumping by operate Controlling for hospital Alternative Hypothesis DF Value Statistic Prob Nonzero Correlation 6 3404 0 0118 Row Mean Scores Differ General Association 0 0862 0 1016 6 5901 10 5983

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a CMH statistic for correlation alternative using equal...

Question: The books Web site (wvvw.stat.ufl.edu/ ¼aa/cda/cda.html) has a 3 Ã 4 Ã 4 table that cross-classifies dumping severity (Y) and operation (X) for four hospitals

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