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25 February, 01:31

A researcher posts a print advertisement offering $20 in exchange for participation in a short study. The researcher accepts the first five people who respond to the advertisement. Which of the following statements is true about the sample?

It is a valid sample because the first five people were selected to participate.

It is not a valid sample because it is not a random sample of the population.

It is a valid sample because money was offered to participants.

It is not a valid sample because it is only a short study.

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  1. 25 February, 01:52
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    It's a valid sample because the first five people were selected to participate.

    True because random people who saw the advertisement responded. By chance, not every person who saw the advertisement answered, therefore it was random, but it would be more random if he decided to reject the second, fourth, sixth, and eighth person, and only the first, third, fifth, seventh, and ninth were chosen.
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