Four Surgical Procedures Currently Are Used to Install Pacemakers

question 28

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: Procedure

Which of the following tests will be the most appropriate to find out which of the 4 procedures is the most effective?

• A) X² 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) The Marascuilo procedure

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Definitions:

Steep Mountain Front

A steep mountain front is a pronounced topographical feature where the slope of a mountain is dramatically steeper, often marking the boundary between differing geological formations.

River

A large, natural stream of water flowing in a channel to the sea, a lake, or another such stream.

Sand Dune

A hill or a ridge made of sand that has been shaped by the wind.

Deep Water

Water located in deep areas of oceans or lakes, typically characterized by cold temperatures and high pressures.