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
teddy boys: a British youth subculture that first appeared in the 1950s; mainly from unskilled backgrounds, they adopted a pseudo-Edwardian dress code and rock'n'roll music; proletarian and xenophobic, they were involved in race riots in the United Kingdom