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

question 18

True/False

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,the decision made suggests that the four procedures do not all have the same proportion of clear operations.

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Definitions:

Suggestibility

The quality of being inclined to accept and act on the suggestions of others, often studied in the context of memory and eye-witness testimony.

Transience

The state or quality of being transient, specifically referring to the tendency of memories to become less accessible over time.

Recognition

Recognition in psychology refers to the ability to identify previously encountered events, objects, or people, which is one aspect of memory.

Decay

The process of gradual deterioration or the breakdown of organic matter, structures, or functions over time.