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:

Treatments

In experimental research, the conditions applied to different groups of participants to observe potential changes in behavior or outcomes.

Factor

An element or constituent that contributes to a result or outcome.

Population Means

The average value of a characteristic in a population, and a parameter that is often estimated from sample data.

ANOVA

Analysis of Variance, a statistical method used to compare means of three or more samples, testing the hypothesis that all samples are taken from populations with the same mean.