Types of Economic Data For each of the following e whether the data are cross-section, time series or panel data. (a) Quarterly data on the level of U.S. new housing construction from 2000 to 2018. (b) Data on number of doctor visits in 2018 for a sample of 192 individuals. (c) Data on annual health expenditures for each U.S. state from 2000 to 2018. (d) Data on usual mode of transportation used to commute to work for a sample of 151 individuals. xamples state whether the data are numerical or categorical, and state