Easy - Quiz 1

Start building your inference toolkit: learn the difference between a sample and a population, spot biased surveys, and make simple estimates from data.

Question 1 of 5

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Question 1

A researcher wants to estimate the average amount of sleep high school students in a state get per night. Which sampling method would best allow the researcher to generalize the results to all high school students in the state?

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A school has 400 students. The principal randomly surveys 50 of them about their lunch preferences. In this situation, what is the population?

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In a random sample of 80 registered voters in a town, 60 say they support a new parks proposal. There are 2,000 registered voters in the town. Based on the sample, approximately how many voters in the town support the proposal?

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A gym surveys its members and finds that 85% of them exercise at least three times per week. The gym concludes that 85% of all adults in the city exercise at least three times per week. Why is this conclusion likely invalid?

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A poll reports that 55% of residents in a county support a new recycling program, with a margin of error of 3 percentage points. Which of the following is the best interpretation?

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