the distribution function of the random variable y is given by f(y)=1-9/y的二次方 for y>3, 0 elsewhere
find p(y≦5)and p(y>8)
please steps by steps !
f(3)=1-[9/(3^2)]=0
f(5)=1-[9/(5^2)]=16/25
p(y≦5)=16/25
f(8)=1-[9/(8^2)]=55/64
所以 p(y>8)=1-(55/24)=9/64
f(y)應該為F（y）之誤
Copyright © 2024 1QUIZZ.COM - All rights reserved.
Answers & Comments
Verified answer
f(3)=1-[9/(3^2)]=0
f(5)=1-[9/(5^2)]=16/25
p(y≦5)=16/25
f(8)=1-[9/(8^2)]=55/64
所以 p(y>8)=1-(55/24)=9/64
f(y)應該為F（y）之誤