At a security checkpoint to a government facility, every 10th individual was more thoroughly searched than the others. What type of sampling is this? | Systematic.
A sample of households is selected and the average (mean) number of people per household is 2.58 (based on data from the U.S. Census Bureau. | Statistic
The mean weight of pennies currently being minted is 2.5 grams. | Continuous data
