Mathematics, 28.08.2019 00:20, lex3340

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a researcher places a radio advertisement offering $32 in exchange for participation in a short study. the researcher accepts the first nine people who respond to the advertisement. which of the following statements is true about the sample? it is a valid sample because the first nine 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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a researcher places a radio advertisement offering $32 in exchange for part...