2 (2(2^2)) The tower of four 2s 2 or the repeated exponent of four 2s (((2^2)^2)2)​

Identify all the cases where non-probability sampling is used when attempting to study the characteristics of a large city. studies on every subject in the population divide a population in groups and obtain a sample studies with a limited amount of time demonstrate existing traits in a population studies with the nth person selected