This fact is exploited in two important situations:* Suppose it is inconvenient or impractical to obtain a population sample, but it is practical to obtain a convenience sample of units with different "X" values, such that within the "X" = 0 and "X" = 1 subsamples the "Y" values are representative of the population (i.e.
This fact is exploited in two important situations:* Suppose it is inconvenient or impractical to obtain a population sample, but it is practical to obtain a convenience sample of units with different "X" values, such that within the "X" = 0 and "X" = 1 subsamples the "Y" values are representative of the population (i.e.