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:

Ordinal Data

A type of categorical data that has a meaningful order or ranking among the categories but not a measurable distance between them.

Significance Level

A threshold in hypothesis testing that determines the probability of rejecting the null hypothesis when it is actually true, typically denoted by alpha.

Kruskal-Wallis Test

A nonparametric method for testing whether samples originate from the same distribution, often used when comparing three or more groups.

Wilcoxon Rank Sum Test

A non-parametric statistical test used to assess whether two independent samples come from populations with the same distribution.