A social research methods class wants to study smoking. First, the professor asks how many people in the class are smokers. Two people indicate that they are. Then she asks how many people have smoked a cigarette in the past week and ten people indicate that they had. From this, the class decides, for the purposes of the survey, a smoker will be anyone who has smoked a cigarette in the past week and currently owns a pack of cigarettes. This is a(n)

An operational definition

Explanation:An operational definition refers to what a researcher uses on order to measure out that specific variable , that they are interested in measuring. This is crucial in order to make a person be well aware of what the researcher is speaking about when they make certain references.

b) the planets year length would be longer

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answer; /// the need to make choices because economic wants exceed economic means;