Question: (1) Discuss the difference between cross-sectional data and time series data. (2) If we record the total number of cars sold in 2015 by each

(1) Discuss the difference between cross-sectional data and time series data.

(2) If we record the total number of cars sold in 2015 by each of 10 car salespeople, are the data cross-sectional or time series data?

(3) If we record the total number of cars sold by a particular car salesperson in each of the years 2011, 2012, 2013, 2014, and 2015, are the data cross-sectional or time series data?

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