Which of the following is an example of a time-series data set?

A. average amount of labor employed at specific times of the day at a specific factory in 2010.
B. amount of labor employed yearly in a specific factory from 1990 through 2010.
C. amount of labor employed in each factory in the U.S. in 2010.
D. All of the above are time-series data sets.


Answer: B

Economics

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