Instruction 15-6
Four Surgical Procedures Currently Are Used to Install

question 40

Short Answer

Instruction 15-6
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 centre wants to compare the proportion of clear operations for the four procedures, and collects the following numbers of patients from their own records:
| Procedure |
$$\begin{array} { | l | c | c | c | c | c | } \hline & \text { A } & \text { B } & \text { C } & \text { D } & \text { Total } \\\hline \text { Clear } & 27 & 41 & 21 & 7 & 96 \\\hline \text { Return } & 11 & 15 & 9 & 11 & 46 \\\hline \text { Total } & 38 & 56 & 30 & 18 & 142 \\\hline\end{array}$$ They will use this information to test for a difference among the proportion of clear operations using a chi-square test with a 0.05 level of significance.
-Referring to Instruction 15-6,what is the value of the critical range for the Marascuilo procedure to test for the difference in proportions between procedure B and procedure C using a 0.05 level of significance?

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Definitions:

Varied Loops

Different cycles or sequences of events that repeat, each with unique characteristics or outcomes.

Attitudes Toward Conflict

Individuals' or groups' predispositions on how to perceive and approach conflicts, ranging from avoidance to confrontation.

Orientation

An introduction or adjustment to a new environment, situation, or concept.

Nature

The inherent qualities or characteristics of a person or thing; also refers to the physical world and its biological processes.