Saya mau tau Conto dari Ancillary statistic. Jelaskan dalam bahasa sunda

Anggap X1, ..., Xn mangrupa bebas sarta kasebar identik, sarta kasebar normal mibanda nilai ekspektasi μ jeung varian 1.  (The use as an example, of this particular parametrized family of probability distributions, all having the same variance, is unréalistic, in that it amounts to a situation in which the statistician somehow knows the exact value of the polpulation variance, but can only estimate the population méan by using the observed values of the data X1, ..., Xn.)  Let

be the sample mean.  Variabel acak

is not an ancillary statistic, even though its probability distribution does not depend on μ  That is because it is not a statistic, since its value depends on the unobservable population mean μ