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) 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) Kruskal-Wallis rank Test.

Question

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) 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) Kruskal-Wallis rank Test.

Quizplus · Accepted Answer

The Answer of 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) 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) Kruskal-Wallis rank Test.

Four Surgical Procedures Currently Are Used to Install Pacemakers