A community for students.
Here's the question you clicked on:
 0 viewing
 2 years ago
P(X=1)= P(x=+1)=1/2P(X=0)
a) compute P(X=0)
b)compute Standand deviation funcion of x
c)draw cumulative distributive function of x
d) compute P(x=1 x>=0)
 2 years ago
P(X=1)= P(x=+1)=1/2P(X=0) a) compute P(X=0) b)compute Standand deviation funcion of x c)draw cumulative distributive function of x d) compute P(x=1 x>=0)

This Question is Closed

Libniz
 2 years ago
Best ResponseYou've already chosen the best response.0P[x=1]+P(x=1)+P[x=0]=1 P[x=1]+P[x=1]=P[x=0] 2P[x=0]=1 P[x=0]=0.5 P[x=1]=P[x=1]=.25

wio
 2 years ago
Best ResponseYou've already chosen the best response.0Umm that first line is hard to read.

Libniz
 2 years ago
Best ResponseYou've already chosen the best response.0b) standard deviations of X E[x]=.25(1)+.25(1)+0(.5)=0 (E[x])^2=0 E[x^2]=.5 var[x]= .50=.5 standard deviation=.5

Zarkon
 2 years ago
Best ResponseYou've already chosen the best response.1your final answer for b is not correct

Zarkon
 2 years ago
Best ResponseYou've already chosen the best response.1d)\[P(X=1 X\ge0)=\frac{P(X=1,X\ge 0)}{P(X\ge 0)}\]

Zarkon
 2 years ago
Best ResponseYou've already chosen the best response.1\[P(X=1 X\ge0)=\frac{P(X=1,X\ge 0)}{P(X\ge 0)}=\frac{P(X=1)}{P(X\ge 0)}\]

Libniz
 2 years ago
Best ResponseYou've already chosen the best response.0what does the comma mean P(X=1,X≥0)?

Zarkon
 2 years ago
Best ResponseYou've already chosen the best response.1\[P(X=1 \text{ and } X\ge0)\]

Libniz
 2 years ago
Best ResponseYou've already chosen the best response.0product of the two then ?

Zarkon
 2 years ago
Best ResponseYou've already chosen the best response.1no...they are not independent

Zarkon
 2 years ago
Best ResponseYou've already chosen the best response.1\[P(X=1 \text{ and } X\ge0)=P(X=1)\]

Libniz
 2 years ago
Best ResponseYou've already chosen the best response.0oh, "and "means it has to satisfy both condition. x=1 is inside x>=0 ; so we choose x=1

Zarkon
 2 years ago
Best ResponseYou've already chosen the best response.1\[x\ge 0\Rightarrow x\in\{0,1\}\] \[\{1\}\cap\{0,1\}=\{1\}\]

Libniz
 2 years ago
Best ResponseYou've already chosen the best response.0\[\frac{P(X=1)}{P(X\ge 0)}\] 0.25  = 1/3 0.75

Libniz
 2 years ago
Best ResponseYou've already chosen the best response.0you are truly a great teacher; thanks sir @Zarkon
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.