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MathSofiya
Group Title
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
 one year ago
 one year ago
MathSofiya Group Title
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
 one year ago
 one year ago

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hartnn Group TitleBest ResponseYou've already chosen the best response.1
multiply corresponding x and p(x) values, like 0*0.237+1*0.396 .......
 one year ago

slaaibak Group TitleBest ResponseYou've already chosen the best response.0
you 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
 one year ago

MathSofiya Group TitleBest ResponseYou've already chosen the best response.0
oh ok. It seemed too simple
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
welcome ^_^
 one year ago

MathSofiya Group TitleBest ResponseYou've already chosen the best response.0
for 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
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
yes! finally take square root then.
 one year ago

MathSofiya Group TitleBest ResponseYou've already chosen the best response.0
oh yes of course. Thank you!
 one year ago

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

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

hartnn Group TitleBest ResponseYou've already chosen the best response.1
let me search.
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
http://en.wikibooks.org/wiki/LaTeX/Mathematics
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
maybe write in matrix form .....of nX2 i'll look up something specifically for table
 one year ago

MathSofiya Group TitleBest ResponseYou've already chosen the best response.0
oh ok, thanks
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
http://openstudy.com/users/accessdenied#/updates/4fa5b375e4b029e9dc35a2cf
 one year ago

MathSofiya Group TitleBest ResponseYou've already chosen the best response.0
\hlines what does that do?
 one year ago

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

hartnn Group TitleBest ResponseYou've already chosen the best response.1
ok and http://en.wikibooks.org/wiki/LaTeX/Tables
 one year ago

MathSofiya Group TitleBest ResponseYou've already chosen the best response.0
oh perfect! There's the explanations for \hlines. Thanks! =D
 one year ago
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