private static void CalculateScores(List <Game> games)
{
var confidence = WilsonScore.pnormaldist(0.95);
foreach (var game in games)
{
game.AllTotalReviews = game.AllPositiveReviews + game.AllNegativeReviews;
game.WilsonScore = WilsonScore.Score(game.AllPositiveReviews, game.AllTotalReviews, confidence) * 100;
}
}
public void MatchesAnotherImplementation()
{
for (var confidence = 0.01; confidence <= 0.99; confidence += 0.01)
{
var z = Normal.InvCDF(
mean: 0,
stddev: 1,
p: 1 - (1 - confidence) / 2);
for (uint total = 1; total < 100; ++total)
{
for (uint up = 0; up <= total; ++up)
{
var myScore = WilsonScore.CalculateWithZScore(up, total, z);
var theirScore = Wilson.Score(up, total, z);
var difference = Math.Abs(theirScore - myScore);
Assert.IsTrue(
difference <= 1E-15,
$"Difference was {difference}: my score: {myScore}; their score: {theirScore}; up/total: {up}/{total}; confidence: {confidence}");
}
}
}
}
