Celia begins saving $28 each week from her paycheck to put toward a
trip to Sicily. Airfare will be $942
including taxes and fees. How many
weeks will it take Celia to save for the
airfare?

Aresearch study is done to find the average age of all u.s. factory workers. the researchers asked every factory worker in ohio what their birth year is. this research is an example of a census survey convenience sample simple random sample