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

question 37

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, the expected cell frequency for the Procedure D/Return cell is_____

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Definitions:

Global Marketing Locations

Geographical areas around the world where companies promote and sell their products or services.

Currency Exchange Rate

The rate at which one currency can be exchanged for another, often determined by national economies and global market conditions.

Japanese Yen

The official currency of Japan, which plays a significant role in international finance and trade.

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A condition where a government is stable, capable of maintaining order, and there is an absence of political turmoil or frequent government change.