Question: Confidence Interval for a proportion A screening test (PSA) for enlarged prostate is given to a sample of 500 retired police union members aged 60

Confidence Interval for a proportion A screening test (PSA) for enlarged prostate is given to a sample of 500 retired police union members aged 60 to 75. Of the 500 subjects 120 had elevated PSAs What is the 95% confidence interval for the population proportion of all retired police union members in this age range

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