TABLE 12-9
Four Surgical Procedures Currently Are Used to Install

question 76

Short Answer

TABLE 12-9
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 proportion of clear operations for the 4 procedures, and collects the following numbers of patients from their own records:
$$\begin{array}{l}\text {\quad\quad\quad\quad\quad\quad\quad Procedure }\\\begin{array} { l | r r r r | r } & \text { A } & \text { B } & \text { C } & \text { D } & \text { Total } \\\hline \text { Clear } & 27 & 41 & 21 & 7 & 96 \\\text { Return } & 11 & 15 & 9 & 11 & 46 \\\hline \text { Total } & 38 & 56 & 30 & 18 & 142\end{array}\end{array}$$ They will use this information to test for a difference among the proportion of clear operations using a chi-square test with a level of significance of 0.05.
-Referring to Table 12-9, what is the value of the critical range for the Marascuilo procedure to test for the difference in proportions between procedure C and procedure D using a 0.05 level of significance?

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Definitions:

Extinct Conditioned Responses

The process by which a conditioned response becomes weaker or disappears after the conditioned stimulus is repeatedly presented without the unconditioned stimulus.

Cognitive Psychologists

Specialists in the field of psychology who study mental processes such as perception, memory, thought, and problem-solving.

Temporary Change

A modification or alteration that is not permanent, often expected to revert back to the original state after a certain period or under specific conditions.

Organism's Behavior

The observable actions or reactions of living entities in response to external or internal stimuli.