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Mathematics, 18.05.2021 20:00 lj2754

A researcher posts a newspaper 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? (5 points) Question 9 options: 1) It is not a valid sample because it is only a short study. 2) It is a valid sample because money was offered to participants. 3) It is a valid sample because the first five people were selected to participate. 4) It is not a valid sample because it is not a random sample of the population.

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