public double Calculate(IList <double> numbers)
{
var arithmeticMean = arithmeticMeanAlgorithm.Calculate(numbers);
var differenceSquared = numbers.Select(n => Math.Pow(n - arithmeticMean, 2));
var squaredMean = arithmeticMeanAlgorithm.Calculate(differenceSquared.ToList());
return(Math.Sqrt(squaredMean));
}
public IndexViewModel Build()
{
var randomNumbers = randomNumberRepository.GetAll().Select(rn => rn.Number).ToList();
return(new IndexViewModel()
{
FrequencyDistribution = frequencyDistribution.Calculate(randomNumbers),
Mean = arithmeticMean.Calculate(randomNumbers),
StandardDeviation = standardDeviation.Calculate(randomNumbers)
});
}