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I have farms in my dataset and from each farm, I have a few animals (varies for each farm) to test for a disease. I want to know, if I tested these animals, what apparent prevalence will I be able to detect in each herd. I want to estimate this for each herd.

There is a formula for estimating the sample size for a given prevalence; but how could one estimate the prevalence, if the sample size is known?

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  • $\begingroup$ You seem to be asking how to find the result of a sample without actually taking the sample. Could you clarify what you're looking for? $\endgroup$ Commented Feb 7, 2020 at 21:46
  • $\begingroup$ I have sample sizes and I want to know what is the minimum prevalence I can detect from it ( it is the reverse of sample size calculation). $\endgroup$ Commented Feb 7, 2020 at 21:55
  • $\begingroup$ What kind of prevalence are you referring to and what is the intended study design? $\endgroup$ Commented Feb 7, 2020 at 21:58
  • $\begingroup$ I have farms in my dataset and from each farm, I have few animals (varies for each farm) to test for a disease. I want to know, if I tested these animals, what apparent prevalence will I be able to detect in each herd. I want to estimate this for each herd. I hope this helps, thanks- Abby $\endgroup$ Commented Feb 7, 2020 at 22:09
  • $\begingroup$ It does help, thank you. Please include that information in your post. $\endgroup$ Commented Feb 7, 2020 at 23:02

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