How small would the sample percentage need to be

Reference no: EM131029255

A manufacturer claimed that at least 20% of the public preferred her product. A sample of 100 persons is taken to check her claim. With α = .05, how small would the sample percentage need to be before the claim could legitimately be refuted? (Notice that this would involve a one-tailed test of the hypothesis.)

Reference no: EM131029255

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