Providence is a flexible round-by-round Risk-Limiting Audit. This is my personal code for the Providence audit. I use this repo for general exploration as well as test data generation for testing the code in r2b2...
Here is a sample of some computations that this code can perform:
alpha=0.1
p_1=0.6
p_0=0.5
Round 1 size to achieve 90% sprob:
Bravo: 342
Minerva 2.0: 173
Round 1 Draw: n1=125, k1=70
kmin_1(BRAVO)=75
kmin_1(Minerva 2.0)=71
sigma_1=1.63168570176992
omega_1=8.009916930248211
Round 2 size to achieve 90% sprob:
Bravo: 431
Minerva 2.0: 265
Round 2 Draw: n2=225, k2=126
kmin_2(BRAVO)=130
kmin_2(Minerva 2.0)=127
sigma_2=2.414046960617199
omega_2=9.878411274542342
Round 3 size to achieve 90% sprob:
Bravo: 493
Minerva 2.0: 330
Round 3 Draw: n3=325, k3=182
kmin_3(BRAVO)=185
kmin_3(Minerva 2.0)=181
sigma_3=3.571535082855545
omega_3=14.61491553622636