Re: [問題] 統計一題
※ 引述《darkstar0412 (蘭花花瓣有貓耳的觸感@@")》之銘言:
: Q:連續型隨機變數X的機率密度函數與累積分配函數分別為f(x)與F(x)。若k為正數,
: 則Y=|X+k|的累積分配含數為_____________?
: 感蝦~~
F (y) = P( Y <= y ) = P ( | X + k | <= y ) = P ( -y <= X + k <= y )
Y
= P ( -y - k <= X <= y - k)
= F ( y - k ) - F ( -y - k )
X X
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推
04/02 12:04, , 1F
04/02 12:04, 1F
推
04/02 12:28, , 2F
04/02 12:28, 2F
推
04/02 12:30, , 3F
04/02 12:30, 3F
推
04/02 12:42, , 4F
04/02 12:42, 4F
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