Lily’s mother asks Lily to buy 4 pounds of flour from the grocery store. The weights on the flour packages are in ounces. The ratio of pounds to ounces is 1 : 16. What is the amount of flour in ounces that Lily needs to buy?

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