Question: 9. A researcher would like to evaluate the claim that large doses of vitamin C can help prevent the common cold. One group of people

9. A researcher would like to evaluate the claim that large doses of vitamin C can help prevent the common cold. One group of people is given a large dose of the vita- min (500 mg per day), and a second group is given a placebo (sugar pill). The researcher records whether or not each individual experiences a severe cold during the 3-month winter season.

a. Identify the dependent variable for this study.

b. Is the dependent variable discrete or continuous?

c. What scale of measurement (nominal, ordinal, interval, or ratio) is used to measure the dependent variable?

d. What research method is being used (experimental or correlational)?

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