A data set that consists of a sample of individuals, households, firms, cities, states, countries, or a variety of other units, taken at a given point in time, is called a(n) _____.
A. cross-sectional data set
B. longitudinal data set
C. time series data set
D. experimental data set
Answer: A
Economics
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A question on an economics exam asks, "What happens in the market for jelly when the price of peanut butter increases?" Allison, an excellent student, shows the demand for jelly increasing. Is she necessarily wrong? Why or why not?
Economics