{{alias}}( iterator[, mean] )
    Computes an unbiased sample variance over all iterated values.

    Parameters
    ----------
    iterator: Object
        Input iterator.

    mean: number (optional)
        Known mean.

    Returns
    -------
    out: number|null
        Unbiased sample variance.

    Examples
    --------
    > var arr = {{alias:@stdlib/array/to-iterator}}( [ 2.0, -5.0 ] );
    > var s2 = {{alias}}( arr )
    24.5

    See Also
    --------