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anonymous
 3 years ago
what is the expected value of x^2 in mathematical form?
anonymous
 3 years ago
what is the expected value of x^2 in mathematical form?

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

ParthKohli
 3 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
 3 years ago
Best ResponseYou've already chosen the best response.0'Mathematical form' is still ambiguous.

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

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

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

anonymous
 3 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
 3 years ago
Best ResponseYou've already chosen the best response.0http://openstudy.com/study?login#/updates/4ffffc85e4b0848ddd64e880

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

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

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

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

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

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

UnkleRhaukus
 3 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
 3 years ago
Best ResponseYou've already chosen the best response.0yes for a discrete random variable

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

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

UnkleRhaukus
 3 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
 3 years ago
Best ResponseYou've already chosen the best response.2where \(\rho(x)\) is the probability density

UnkleRhaukus
 3 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
 3 years ago
Best ResponseYou've already chosen the best response.0@UnkleRhaukus small question the E(constant) is a constant right

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