[機率] 隨機變量問題!

看板Math作者 (秘密客)時間13年前 (2012/09/15 12:26), 編輯推噓1(1推 0噓 1→)
留言2則, 2人參與, 最新討論串1/1
If X is an integer-valued random variable, show that its pmf p is related to its cdfF by p(k) = F(k) - F(k - 1), for all integers k. 有人可以解答一下嗎?謝謝^^ -- -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 204.52.215.1
推
09/15 12:32, , 1F
請查CDF基本定義F(k) = P[X <= k]
09/15 12:32, 1F
→
09/15 12:47, , 2F
所以是P[X<=K]-P[X<=k-1]=F(K)-F(K-1)囉?
09/15 12:47, 2F
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