Scenario:A study was conducted to compare three different methods of administering an intravenous (IV) injection of heparin. Each of the 150 patients in the study received a heparin injection by one of the three methods. For each patient the amount of bruisingaround the injection site was re corded as "bruising" and "no bruising." The data wererecorded as follows:

Method of Bruising No Bruising Injection

A 30 20

B 10 40

C 25 25

The investigator wished to determine if there were adifferencein proportion of bruises for methods A, B, and C (or, identically, if there is a difference in proportion of no bruising). What statistical test is appropriate?

Using the scenario above answerthe following5questions:

1. What type of research question is being asked?
2. What is the level of measurement of the response variable?
3. What is the research design (1, 2, 2+ groups)?
4. Were samples independently selected or were they matched?
5. What is the appropriate statistical test for analysis