In an effort to identify if an advertising campaign has been effective, a marketing firm conducts a nationwide poll by randomly selecting individuals from a list of known users of the product.

A member of Congress wishes to determine her constituency’s opinion regarding estate taxes. She divides her constituency into three income classes: low-income households, middle-income households, and upper-income households. She then takes a simple random sample of households from each income class.

A radio station asks its listeners to call in their opinion regarding the use of U.S. forces in peacekeeping missions.

1.     A farmer divides his orchard into 50 subsections, randomly selects 4, and samples all the trees within the 4 subsections to approximate the yield of his orchard.

The letter grade received in your Statistics Class.

Volume of water used by a household in a day.

Eye color.

Temperature.

Determine whether the data set is a population or a sample:

A survey of 300 people from an auditorium with 13,000 people