Question: A group of 200 adults aged 21 to 50 were selected from those entering Fit Right

Health stores in Washington State, and were randomly divided into two groups. One

group was given an herb and the other a placebo. After 6 months, the number of

respiratory tract infections in each group were compared.

1. What is the population?
2. What is the sample?
3. Is the study observational or experimental? Justify your answer.
4. What are the variables?
5. For each of those variables, what level of measurement (nominal, ordinal,

interval, or ratio) was used to obtain data from these variables?

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Solution: The downloadable solution consists of 1 pages
Deliverable: Word Document