Question 576093: 2. A hospital conducts a study of heart-attack victims entering their ER: Half of the patients are given a clot-busting drug, while the other half receive angioplasty. The survival rates are determined, and any side effects are noted.
I. What is the population?
II. What is the sample?
III. Is the study observational or experimental? Justify your answer.
IV. What are the variables?
V. For each of those variables, what level of measurement (nominal, ordinal, interval, or ratio) was used to obtain data from these variables?
Answer by jim_thompson5910(35256)   (Show Source):
You can put this solution on YOUR website! I. The population is the set of all heart attack victims.
II. The sample is the set of patients undergoing the study.
III. This is an experiment because the sample is broken up into two groups where one group is given treatment of the drug being tested (while the other is given the status quo treatment, or control treatment).
IV. The variables are the survival rates and the side effects.
V. Survival rates are measure in years, so this is a ratio level measurement. Side effects are a nominal measurement since they list out symptoms and such (in verbal detail).
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