why is pivotal quantity not a statistic what is pivot statistic why is pivot not a statistic why is pivotal quantity no statistic why is a pivot a statistic why is the pivot quantity not a statistic pivotal quantity definition why is pivot quantity not always a statistic why is a pivot quantity not a statistic is a pivotal quantity a statistic for a model why is pivot a statistic why is pivot a statistic why is pivotal quantities not necessarily a statistic why is pivotal quantity not a statistic why is pivotal a statistic why would a pivot quantity not be a statistic what does pivot measure is pivot a statistical statistic pivotal value is also known as ________. pivotal quantities are not statistically related to