At one grocery store, a dozen eggs cost $1.20. at another store, 1 1/2 dozen eggs cost $2.16. which is the better buy?
list the prices of both.

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