 a statistic whose probability distribution does not depend on unknown parameter values).This means that observing a specific outcome "x" of experiment "E" is equivalent to observing the value of "h" and taking an observation "x"h from the component experiment "E"h, for example, rolling a dice (whose value is "h" = 1 ... 6) to determine which of six experiments to conduct (experiment "E" ... "E").The conditionality principle can be formally stated thus