John wants to buy a new video game it cost $39.00. he has $14.00 in his piggy bank. he works for farmer jones down the street for $5.00 an hour. how many hours will he need to work before he can buy his new video game?

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