Identify the type of sample a) A market research company mails surveys to all of the adult residents in a town. The survey asks about brands of consumer products. The residents are asked to mail back their responses in a prepaid envelope. b) A university is polling its students. It selects 200 students at random in the same proportions as the enrollment in each departmentc) A marketing firm wants to collect information on certain products in a city of 800 000 people. The researchers randomly select 10 neighbourhoods. In each neighbourdhood they randomly select five streets, and on each street they randomly select 10 households. d) A telephone company wants to determine whether a fitness centre would be used by its 3000 employees. The company plans to survey 300 employees by interviewing every tenth person on the payroll list. e) You want to find out if your town is in favour of starting a composting pickup service. You ask everyone on the street