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

question 40

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:

Procedure
$$\begin{array} { | r | c c c c | c | } \hline & \text { A } & \text { B } & \text { C } & \text { D } & \text { Total } \\\hline \text { Clear } & 27 & 41 & 21 & 7 & 96 \\\hline \text { Retur1 } & 11 & 15 & 9 & 11 & 46 \\\hline \text { Total } & 38 & 56 & 30 & 18 & 142 \\\hline\end{array}$$
Which of the following tests will be the most appropriate to find out whether the 4 procedures are equally effective?

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Definitions:

Perfume

A fragrant liquid typically made from essential oils or aroma compounds, used to provide a pleasant scent.

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The theory and method of differentiating between information-bearing patterns and random patterns that distract from the information.

Fechner's Law

A principle describing the logarithmic relationship between stimulus magnitude and perceptual intensity, suggesting that sensation increases as the logarithm of the stimulus intensity.