# Random variables X_{1},X_{2},...,X_{n} are independent and identically distributed. 0 is a parameter of their distribution. State the definition for a pivotal function of X, the vector of random variables, and 0.

Random variables ${X}_{1},{X}_{2},...,{X}_{n}$ are independent and identically distributed. 0 is a parameter of their distribution.
State the definition for a pivotal function of X, the vector of random variables, and 0.
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davonliefI
A pivotal function is a function under which the functions