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

question 62

True/False

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,the decision made suggests that the four procedures all have different proportions of clear operations.

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Definitions:

Crowdsourcing

A process where a task, problem, or project is solved and completed through contributions from a large group of people, particularly from an online community, rather than from traditional employees or suppliers.

Perpetual Betas

Refers to software or systems that are continuously updated and improved upon, never considered to be in a final or complete state.

Network Effects

The phenomenon where the value or utility of a product or service increases as more people use it, often seen in social media platforms and online marketplaces.

Reputation Economies

Systems where the value is assigned based on the reputation of users, often found in online platforms where contributions are judged by community feedback.