what type of variable is considered a pivot variable is $t a discrete random variable does the variable $t$ need a pivot why is cdf not considered a pivot is $t$ a discrete variable? is $T$ discrete when the probability of a discrete variable is uniformly distributed is $t a discrete variable does cdf provide a pivot if $t is a discrete variable what is a pivot what is the pivot of the cdf is $t a discrete variable when is cdf a pivot what type of variable is used for pivoting when determining whether a confidence interval is a pivot variable, casella use the following example: when is t a discrete variable that is not a pivot what is the pivot of the cdf how is the pivot calculated? when cdf is discrete what is the function pivot in a cdf?