[問題]兩題數理統計的問題
我有兩題數理統計的問題不會
想請教板上的各位...希望會的人 能不吝指教...謝謝!!
(1) Give an example in which the best linear predictor of Y given Zis a
constant(has no predictive value) whereas the best predictor of Y given
Z predicts Y perfectly .
(2) Give an example in which Z can be used to predict Y perfectly , but Y
is of no value in predicting Z in the sense that Var(Z|Y) = Var(Z) .
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