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

question 124

True/False

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, there is sufficient evidence to conclude that the proportions between procedure A and procedure B are different at a 0.05 level of significance.

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Definitions:

Product Variety

Product Variety refers to the range of different products or services offered by a firm or available in a market.

Allocative Efficiency

A state of economic efficiency where resources are distributed in a way that maximizes the net benefit to society.

Monopolistic Competition

A scenario in the market characterized by numerous organizations providing products that are parallel but not the same, resulting in some level of market dominance.

Economic Inefficiencies

Situations where resources are not allocated optimally according to some criteria, leading to wasted or less effective outcomes.