Accord.Tests.Statistics.ZTestTest.SampleSizeTest1 C# (CSharp) Method

        public void SampleSizeTest1()
        {
            // Example from http://wise.cgu.edu/powermod/computing.asp

            double mean = 104;
            double stdDev = 10;
            int samples = 25;
            double hypothesizedMean = 100;

            OneSampleHypothesis hypothesis = OneSampleHypothesis.ValueIsGreaterThanHypothesis;
            ZTest target = new ZTest(mean, stdDev, samples, hypothesizedMean, hypothesis);

            ZTestPowerAnalysis power = (ZTestPowerAnalysis)target.Analysis;

            power.Size = 0.01;
            power.Power = 0.90;
            power.ComputeSamples();

            double sampleSize = System.Math.Ceiling(power.Samples);

            Assert.AreEqual(82, sampleSize, 1e-16);
        }