Your screening facility can process 1,000 people per week. Assume you are attempting the early detection of a disease with a prevalence of 2%, and your test has a sensitivity of 95% and a specificity of 90%.  A- How many of the people screened in a week will test positive? B- Of those screened, in how many will the results be truly positive? C- of those screened, in how many will the results be truly negative? D- what is the positive predictive value of the screening test? E- what is the negative predictive value of the screening test?    F- what would happen to the negative predictive value of the screening test if the prevalence was 5%?

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