thinkbayes.py 文件源码

def StandardGaussianCdf(x):
    """Evaluates the CDF of the standard Gaussian distribution.

    See http://en.wikipedia.org/wiki/Normal_distribution
    #Cumulative_distribution_function

    Args:
        x: float

    Returns:
        float
    """
    return (erf(x / ROOT2) + 1) / 2