public ConfidenceInterval(double mean, double standardError, int n, ConfidenceLevel level = ConfidenceLevel.L999)
{
Mean = mean;
StandardError = standardError;
Level = level;
Margin = n <= 2 ? double.NaN : standardError *level.GetZValue(n);
Lower = mean - Margin;
Upper = mean + Margin;
}
public void ZValueTest(ConfidenceLevel level, int n, double expected)
{
double actual = level.GetZValue(n);
Assert.Equal(expected, actual, 3);
}