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

question 12

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 B and procedure C using a 0.05 level of significance?

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Definitions:

Monocyte

A type of white blood cell that is part of the immune response, involved in the removal of pathogens and dead or damaged cells from the blood.

Mono-

A prefix meaning single or one, used in various scientific and medical terminologies.

Thrombin

A blood plasma enzyme that initiates blood clotting by transforming fibrinogen into fibrin.

Thromboplastin

A plasma protein that catalyzes the conversion of prothrombin to thrombin, playing a crucial role in the blood clotting process.