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Which sampling method is being described? a. A sample was selected to contain 25 people aged...

Which sampling method is being described?

a. A sample was selected to contain 25 people aged 18-34 and 30 people aged 35-70. b. Viewers of a new show are asked to respond to a poll on the show’s website. c. To survey voters in a town, a polling company randomly selects 100 addresses from a database and interviews those residents.

Math   Statistics-And-Probability   
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