- #1
rosh300
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Homework Statement
[tex]\Omega [/tex] is a set of points [tex]\omega ; C_{i} i [/tex] = 1, 2, ... 7 are subsets of [tex] \Omega[/tex];
and ([tex] \Omega[/tex], F, P) = ([tex]B_{i}, i/10, i = 1, 2, 3, 4 [/tex]) is a probability modal
with [tex] B_{1} = C_{1} \cup C_{7}, B_{2} = C_{2} \cup C_{6}, B_{3} = C_{3} \cup C_{5} and B_{4} = C_{4}[/tex].
State which of the following functions X:[tex]\Omega \rightarrow [/tex] R are random variables defined on (\Omega, F, P) and derive the distributions.
(i)[tex] X(\omega) = -3 [/tex] for [tex] \omega \in C_{1} \cup C_{7} \cup C_{3} \cup C_{5} [/tex] with [tex] X(\omega) = 2 [/tex] otherwise
(ii) [tex]X(\omega) = 1 for \omega \in C_{1} \cup C_{7}, X(\omega) = 2 [/tex] for [tex] \omega \in C_{3} \cup C_{4} and X(\omega) = 2 [/tex] for [tex] \omega \in C_{2} \cup C_{5} \cup C_{6} [/tex]
(iii)[tex] X(\omega) = (v-4)^{2} for \omega \in C_{v}, v = 1, 2, ... 7 [/tex]
Homework Equations
definition of random varibale, probability space
The Attempt at a Solution
(i) random variable
Distrubution:
(-[tex]\infty [/tex], -3) = 0
[-3, 2) = 1/10 + 3/10 = 2/5
[2,[tex] \infty [/tex]) = 1
(ii) not a random variable
(iii) random variable
distrubution:
(-[tex]\infty [/tex], 0) = 0,
[0, 1) = 4/10
[1, 4) = 7/10
[4, 9) = 9/10
[9, [tex]\infty [/tex]] = 1