number of cars sold in a dealership on each day of may. is it A the data are a time series because of the data are measured over
time. B the data are a cross section because the data are taken from situations that vary over time but are measured at a single time instant. c the data are a cross section because the data are measured over time or D the data are a time series because the data are taken from situations vary overtime but are measured at a single time instant
