Four Surgical Procedures Currently Are Used to Install Pacemakers

question 15

Multiple Choice

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 4 procedures,and collects the following numbers of patients from their own records: Which of the following tests will be the most appropriate to find out whether the 4 procedures are equally effective?

• A)χ² test for difference in proportions
• B)Z test for difference in proportions
• C)One-way ANOVA F test for differences among more than two means
• D)McNemar test

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Definitions:

High Standards

The expectation or requirement of a level of performance or quality that is above the norm.

Significant Accomplishments

Achievements that have had a major impact on an individual's career or the progress in a particular field or area.

Bell Curve

A bell-shaped curve that typically represents the normal distribution of a variable or set of data, where most scores cluster around the mean, with symmetric tapering off towards the extremes.

Decrease with Age

A phenomenon where certain abilities, functions, or properties gradually diminish as one grows older.