Problems with beta distrbution
- Dominant language
- Haskell
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Description
Test for quantile inverse fails spectacularly:
```
Quantile is CDF inverse: FAIL
*** Failed! Falsified (after 99 tests):
improperBetaDistr 1.9354985700057857e-2 9.298452506189731
Double01 0.7873411995889938
Quantile = 9.435096862311606e-5
Probability = 0.7873411995889938
Probability' = 0.8812454856896215
Rel. error = 0.10655860100905087
Abs. error = 9.390428610062762e-2
Expected err. = 16.346348384470552
Distance = 845814615782558
Err/est = 5.1743337159392945e13 <---
Use --quickcheck-replay=315907 to reproduce.
```
This is really bug in incompleteBeta and/or invIncompleteBeta. Actual roundtrip error is so bad: 1e13 larger that expected that there's no point in clearing
Probably related: bos/math-functions#32
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