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Prevalence of disease: False Positive

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A screening test is used in the same way in two similar populations, but the proportion of false-positive results among those who test positive in population A is lower than that among those who test positive in population B. What is the likely explanation for this finding? Answer is The prevalence of disease is higher in population A.

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This solution explains why prevalence of a disease is higher in a population that has lower false-positive test results.

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A false positive test for indicates the Type I error, also known as an "error of the first kind", ...

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