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    nrdtrisd : Inverse of normal distribution CDF with respect to
               standard deviation

    Examples
    --------
    `nrdtrimn` can be used to recover the mean of a normal distribution
    if we know the CDF value `p` for a given quantile `x` and the
    standard deviation `std`. First, we calculate
    the normal distribution CDF for an exemplary parameter set.

    >>> from scipy.stats import norm
    >>> mean = 3.
    >>> std = 2.
    >>> x = 6.
    >>> p = norm.cdf(x, loc=mean, scale=std)
    >>> p
    0.9331927987311419

    Verify that `nrdtrimn` returns the original value for `mean`.

    >>> from scipy.special import nrdtrimn
    >>> nrdtrimn(p, std, x)
    3.0000000000000004

    Únrdtrisda€