rank-order correlation coefficient: the most commonly used method of computing a correlation coefficient between the ranks of scores on two variables
nonparametric statistic: a statistic computed without knowledge of the form or the parameters of the distribution from which observations are drawn
phylactery: (Judaism) either of two small leather cases containing texts from the Hebrew Scriptures (known collectively as tefillin); traditionally worn (on the forehead and the left arm) by Jewish men during morning prayer