SCENARIO 12-5 Four Surgical Procedures Currently Are Used to Install Pacemakers.If the Pacemakers.If

question 35

Short Answer

SCENARIO 12-5
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:
Procedure

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 Scenario 12-5,the value of the test statistic is .

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Definitions:

Good Estimates

Approximations or judgments that are considered to be close to the actual value or outcome, often based on some form of logical reasoning or previous data.

Statistically Significant

A determination that the results observed in data are unlikely to be due to chance alone, according to a predefined threshold of probability.

Sample Averages

This refers to the mean value calculated from a sample of data, representing the central tendency of the sampled population.

Standard Deviations

A statistical measure that quantifies the variation or dispersion of a set of numerical data points around the mean of the data set.