Stat數學難

👨🏻‍🏫 學術台數學

[匿名]

2013-08-04 2:23 am

Suppose f (x) is a probability density function defined by:

f(x) = 2x/k^2 0<or= x <or= k

For what value of k does Var (X ) = 2?

Show that f (x) is a valid probability density function for this determined value of k.

回答 (3)

知足常樂

2013-08-04 2:47 am

✔ 最佳答案

Please read:

圖片參考：http://imgcld.yimg.com/8/n/HA00430218/o/20130803184725.jpg

2013-08-03 19:06:33 補充：
不好意思～
其實我開始答的時候還未有人答，但可能我打得太慢。
所以我submit answers時你已經回覆了～

謝謝明白～　:)

參考: Calculated

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[匿名]

2013-08-04 5:08 am

thank you both of you!!!

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