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

question 64

Short Answer

TABLE 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:

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 Table 12-5, what is the value of the critical range for the Marascuilo procedure to test for the difference in proportions between procedure A and procedure C using a 0.05 level of significance?

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Definitions:

P-value

The probability of observing a statistic at least as extreme as the one observed, given that the null hypothesis is true.

Level of Significance

A threshold in hypothesis testing that determines the probability of rejecting a true null hypothesis, often denoted by alpha.

Mean Square

A statistical measure calculated by dividing the sum of squares by the degrees of freedom, often used in variance analysis.

Treatments

Interventions or actions performed in an experimental study to test their effect on an outcome compared to a control condition.