Numbers of false positives to a test

Inputs

  

This utility calculates the expected probability of numbers of false positive results to a test for a given sample size and test specificity, assuming the sample is from an uninfected population. It answers the question: 'For a given sample size and test specificity, and assuming that all animals are uninfected, what is the probability that there will be 1, 2, 3 etc false positives ?'. It also answers the related questions: 'What is the probability of x (1, 2, 3, etc) or more false positive results? and What is the probability of x (1, 2, 3, etc) or less false positive results?'

Inputs are the sample size tested and the test specificity.

Outputs are a table and graph of probabilities associated with each of the likely number of false positive results.

Test specificity :
Sample size :

Top

  Home  |   About this site  |   Glossary   |   References   |   Links  


This site was created by Ausvet with funding from a range of sources.
It provides a range of epidemiological tools for the use of researchers and epidemiologists, particularly in animal health.
Please send any comments, questions or suggestions to Evan Sergeant
© 2017 Ausvet