# Sample Size and Sensitivity/Specificity [closed]

1,765 patients were given a positive/negative screening test for a disease.

N = 415 patients tested positive

N = 1,350 patients tested negative

Due to constraints, not all 1,765 patients were given the definitive disease diagnostic test; clinicians had to pick a sample size (95% CL, 5% MoE) from the positive and negative groups.

n = 200 patients tested positive

n = 300 patients tested negative

Does this mean that the True Positives (TP), FP, FN, and TN values have a +/- 5% MoE? So the 89% True Positives is 84 – 94%?

## closed as off-topic by Sycorax, John, Sven Hohenstein, Christoph Hanck, Nick CoxApr 6 '16 at 10:21

This question appears to be off-topic. The users who voted to close gave this specific reason:

• "Self-study questions (including textbook exercises, old exam papers, and homework) that seek to understand the concepts are welcome, but those that demand a solution need to indicate clearly at what step help or advice are needed. For help writing a good self-study question, please visit the meta pages." – Sycorax, John, Sven Hohenstein, Christoph Hanck, Nick Cox
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• Hi all...any help would be greatly appreciated! – Harper Apr 5 '16 at 4:29
• If this is a homework question, please add the self-study tag and read its wiki – Marquis de Carabas Apr 6 '16 at 8:20
• Thanks for adding the tag. However, in addition to reading the tag wiki, you also needed to modify your question accordingly (as described in the guidelines there). The closure reason also outlines the problem. – Glen_b Apr 11 '16 at 8:22