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MathSofiya
 3 years ago
Intro to Statistics:
\[\mu=\sum xP(x)\]
\[\mu\] is the expected value of x
So would I add the x values and P(x) values and then multiply them to get \[\mu\]?
x: 0 1 2 3 4 5
P(x): 0.237 0.396 0.264 0.088 0.015 0.001
MathSofiya
 3 years ago
Intro to Statistics: \[\mu=\sum xP(x)\] \[\mu\] is the expected value of x So would I add the x values and P(x) values and then multiply them to get \[\mu\]? x: 0 1 2 3 4 5 P(x): 0.237 0.396 0.264 0.088 0.015 0.001

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hartnn
 3 years ago
Best ResponseYou've already chosen the best response.1multiply corresponding x and p(x) values, like 0*0.237+1*0.396 .......

slaaibak
 3 years ago
Best ResponseYou've already chosen the best response.0you would multiply 0 by 0.237 add it to 1 times .396 add it to 2 times 0.264 etc... the sum would be u

MathSofiya
 3 years ago
Best ResponseYou've already chosen the best response.0oh ok. It seemed too simple

MathSofiya
 3 years ago
Best ResponseYou've already chosen the best response.0for the standard deviation I have the equation \[\sigma=\sqrt{\sum(x\mu)^2P(x)}\] So, here I do: \[0\mu=1.253\] \[1\mu=11.253=.253\] \[2\mu=21.253=.747\] \[3\mu=31.253=1.747\] \[4\mu=41.253=2.747\] \[5\mu=51.253=3.747\] square each solution then multiply to P(x), then add those solutions up

hartnn
 3 years ago
Best ResponseYou've already chosen the best response.1yes! finally take square root then.

MathSofiya
 3 years ago
Best ResponseYou've already chosen the best response.0oh yes of course. Thank you!

MathSofiya
 3 years ago
Best ResponseYou've already chosen the best response.0how do I make a table in latex? I have to submit my work electronically and a table would make it easier.

MathSofiya
 3 years ago
Best ResponseYou've already chosen the best response.0I couldn't find it here http://en.wikipedia.org/wiki/Help:Displaying_a_formula#Diagrams_in_TeX

hartnn
 3 years ago
Best ResponseYou've already chosen the best response.1maybe write in matrix form .....of nX2 i'll look up something specifically for table

hartnn
 3 years ago
Best ResponseYou've already chosen the best response.1http://openstudy.com/users/accessdenied#/updates/4fa5b375e4b029e9dc35a2cf

MathSofiya
 3 years ago
Best ResponseYou've already chosen the best response.0\hlines what does that do?

MathSofiya
 3 years ago
Best ResponseYou've already chosen the best response.0I think I get it. I'll just use \\ \hlines before i move on to the next line. Makes sense

MathSofiya
 3 years ago
Best ResponseYou've already chosen the best response.0oh perfect! There's the explanations for \hlines. Thanks! =D
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