Four surgical procedures currently are used to install pacemakers. If the patient does not need to return for follow-up surgery, the operation is called a "clear" operation. A heart center wants to compare the 4 procedures, and collects the following numbers of patients from their own records: $$\begin{array}{c} \text { Procedure }\ \begin{array} { c c c c c c } \hline & \text { A } & \text { B } & \text { C } & \text { D } & \text { Total } \ \hline \text { Clear } & 27 & 41 & 21 & 7 & 96 \ \text { Return } & 11 & 15 & 9 & 11 & 46 \ \text { Total } & 38 & 56 & 30 & 18 & 142 \end{array} \end{array}$$ Which of the following tests will be the most appropriate to find out which of the 4 procedures is the most effective? A) one-way ANOVA F test for differences among more than two means B) the Marascuilo procedure C) Z test for difference in proportions D) ?²test for difference in proportions

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The Answer of Four surgical procedures currently are used to install pacemakers. If the patient does not need to return for follow-up surgery, the operation is called a "clear" operation. A heart center wants to compare the 4 procedures, and collects the following numbers of patients from their own records: $$\begin{array}{c} \text { Procedure }\ \begin{array} { c c c c c c } \hline & \text { A } & \text { B } & \text { C } & \text { D } & \text { Total } \ \hline \text { Clear } & 27 & 41 & 21 & 7 & 96 \ \text { Return } & 11 & 15 & 9 & 11 & 46 \ \text { Total } & 38 & 56 & 30 & 18 & 142 \end{array} \end{array}$$ Which of the following tests will be the most appropriate to find out which of the 4 procedures is the most effective? A) one-way ANOVA F test for differences among more than two means B) the Marascuilo procedure C) Z test for difference in proportions D) ?²test for difference in proportions

Four Surgical Procedures Currently Are Used to Install Pacemakers Which of the Following Tests Will Be the Most Appropriate