This service allows you to enter frequency distributions with up to thirty categories. With DIVA you can calculate the diversity scores using six existing measures of qualitative variation:
1. Simpsons’ D
3. the Index of Qualitative Variation (IQV)
4. the Deviation from the Mode (DM)
5. the Mean Difference Analog (MDA)
6. Herfindahl-Hirschman Index (HHI)
You can also calculate new diversity measure (the Diversity Average (DIVa)) which integrates the most stable of the above measures, population estimates for each of these descriptive measures, using bootstrap resampling methods (based on 10,000 resamples with replacement) and bi-variate hypothesis testing, using permutation testing (based on 10,000 resamples without replacement).
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