Instruction 15-8
Four Surgical Procedures Currently Are Used to Install

question 88

Short Answer

Instruction 15-8
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 |
$$\begin{array} { | l | c | c | c | c | c | } \hline & \mathrm { A } & \mathrm { B } & \mathrm { C } & \mathrm { D } & \text { Total } \\\hline \text { Clear } & 27 & 41 & 21 & 7 & 96 \\\hline \text { Return } & 11 & 15 & 9 & 11 & 46 \\\hline \text { Total } & 38 & 56 & 30 & 18 & 142 \\\hline\end{array}$$ 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 15-8,the expected cell frequency for the Procedure A/Clear cell is ________.

---

Definitions:

Networking

The act of interacting with others to exchange information and develop professional or social contacts.

Researching

The systematic investigation into and study of materials, sources, etc., in order to establish facts and reach new conclusions.

New Project

An initiative or plan that is embarked upon for the first time, aiming to achieve specific goals or outcomes.

Six Levels

A framework or concept that categorizes certain aspects or variables into six distinct layers or stages, often used in organizational, psychological, or developmental contexts.