def significance(alpha, p):
    """Returns whether the p-value is statistically significant or not.
    A p-value (p) less than the significance level (alpha) is statistically
    significant.
    Parameters
    ----------
    alpha: float
        The sigificance level (α) is the probability of a type I error --
        the probability of rejecting the null hypothesis when it is true
    p: float
        p-value
    Returns
    -------
    str
        "YES" if significant result; else "NO"
    """
    return "YES" if p < alpha else "NO"