Instruction 15-8
Four Surgical Procedures Currently Are Used to Install

question 55

Short Answer

Instruction 15-8
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 |
$$\begin{array} { | l | c | c | c | c | c | } \hline & \mathrm { A } & \mathrm { B } & \mathrm { C } & \mathrm { D } & \text { Total } \\\hline \text { Clear } & 27 & 41 & 21 & 7 & 96 \\\hline \text { Return } & 11 & 15 & 9 & 11 & 46 \\\hline \text { Total } & 38 & 56 & 30 & 18 & 142 \\\hline\end{array}$$ 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 15-8,what is the value of the critical range for the Marascuilo procedure to test for the difference in proportions between procedure A and procedure D using a 0.05 level of significance?

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Definitions:

Object Manipulation

The skill of using the hands and fingers to manipulate, move, control, or use objects effectively.

Cognition

Acquiring knowledge and insight through the mental processes of thinking, experiencing, and sensory engagement.

Examine Detail

The process of inspecting or scrutinizing something closely in order to observe or analyze its components.

Motor Skills

Refers to the movements and actions of the muscles, usually coordinated and learned, enabling activities such as walking, running, drawing, and other physical tasks.