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

question 7

Multiple Choice

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) ?² test for difference in proportions

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