Pooled Prevalence Calculator – Demonstration analyses

Estimation of Beta probability distributions for specified alpha and beta parameters

This utility calculates summary values for Beta distributions for specified values for alpha and beta parameters.

For this analysis, two estimates were calculated. The first is for a distribution with alpha = 22.99 and beta = 3.44, and the second for a distribution with alpha = 7.39 and beta = 3.13. These values correspond to the parameters estimated in the parameter estimation example. Input values and results are summarised below:

Alpha value 

 Beta value 

 2.5% percentile 

 25% percentile 

 Median 

 75% percentile 

 97.5% percentile 

 Mean 

 Mode 

 Standard deviation 

22.99

3.44

0.7207

0.832

0.8792

0.9176

0.9668

0.8698

0.9001

0.0642

7.39

3.13

0.41

0.6144

0.7157

0.804

0.9228

0.7025

0.75

0.1347

Density curves for the two distributions are:

and:

Previous    Index   

  Home  |   About this site  |   Glossary   |   References   |   Links   |  216 recent calculations


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
© 2018 Ausvet