A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 4 years ago
what is the expected value of x^2 in mathematical form?
anonymous
 4 years ago
what is the expected value of x^2 in mathematical form?

This Question is Closed

ParthKohli
 4 years ago
Best ResponseYou've already chosen the best response.0\(x \times x\) I think that's what you mean.

ParthKohli
 4 years ago
Best ResponseYou've already chosen the best response.0Hmm. Similarly: \( \color{Black}{\Rightarrow x^3 = x \times x\times x}\) \( \color{Black}{\Rightarrow x^4 = x \times x \times x \times x}\)

ParthKohli
 4 years ago
Best ResponseYou've already chosen the best response.0'Mathematical form' is still ambiguous.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0some stats people know may know

UnkleRhaukus
 4 years ago
Best ResponseYou've already chosen the best response.2\[\langle x^2\rangle =\sum\limits_{j=0}^\infty x^2 P(j)\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0this reminds me of a very fundamental/basic question in calculus..please see my next question..i'll post link..

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[\frac{d}{dx} (\frac{x^3}{3})\]

UnkleRhaukus
 4 years ago
Best ResponseYou've already chosen the best response.2what are you doing at @lgbasallote ,

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0trying to get all that's x^2 and see if anythign suits him

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0http://openstudy.com/study?login#/updates/4ffffc85e4b0848ddd64e880

UnkleRhaukus
 4 years ago
Best ResponseYou've already chosen the best response.2im pretty sure i have provided the answer to the question

UnkleRhaukus
 4 years ago
Best ResponseYou've already chosen the best response.2the expectiation value of \(x\) \[\langle x\rangle =E(x)\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0@UnkleRhaukus yes but x^2

lalaly
 4 years ago
Best ResponseYou've already chosen the best response.4\[Var(x)=E(x^2)(E(x))^2\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0i got the ans... thanks all

UnkleRhaukus
 4 years ago
Best ResponseYou've already chosen the best response.2\[\sigma_x=\langle x^2\rangle\langle x\rangle ^2\]

UnkleRhaukus
 4 years ago
Best ResponseYou've already chosen the best response.2The expectation value , or expect value of a function is \[\langle f(x)\rangle =\sum\limits_{x=0}^\infty f(x)P(x)\] where \(P(x)\) is the probability of x

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0yes for a discrete random variable

UnkleRhaukus
 4 years ago
Best ResponseYou've already chosen the best response.2im not sure why i put j instead of x,

UnkleRhaukus
 4 years ago
Best ResponseYou've already chosen the best response.2oh, you want a continuous function?

UnkleRhaukus
 4 years ago
Best ResponseYou've already chosen the best response.2\[\langle f(x)\rangle=\int\limits_{\infty}^\infty f(x)\rho(x)\text dx\]

UnkleRhaukus
 4 years ago
Best ResponseYou've already chosen the best response.2where \(\rho(x)\) is the probability density

UnkleRhaukus
 4 years ago
Best ResponseYou've already chosen the best response.2so \[\langle x^2\rangle=\int\limits_{\infty}^\infty x^2\rho(x)\text dx\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0@UnkleRhaukus small question the E(constant) is a constant right

UnkleRhaukus
 4 years ago
Best ResponseYou've already chosen the best response.2if the distribution of the variable \(x\) is constant , yes
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.