h****r
发帖数: 9 | 1 A dice is tossed K times (K is a constant): P(X_k = i)=p_i, i=1~6 (when even
, p_i=1/6). The outcomes are summed up. Y=\sum_{k}X_k. What's the pmf of Y?
Is this a trival problem? | C******s
发帖数: 270 | 2 Sums of random variables can be dealt with by generating functions.
even
Y?
【在 h****r 的大作中提到】
: A dice is tossed K times (K is a constant): P(X_k = i)=p_i, i=1~6 (when even
: , p_i=1/6). The outcomes are summed up. Y=\sum_{k}X_k. What's the pmf of Y?
: Is this a trival problem?
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