Béda révisi "Fungsi dénsitas probabilitas"

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:<math>f(x)={e^{-{x^2/2}}\over \sqrt{2\pi}}</math>.
 
If aLamun [[variabel random variable]] ''X'' isdiberekeun givensarta anddistribusina itskaasup distributionkana admitsfungsi aprobabiliti probability density functiondensiti ''f''(''x''), then themangka [[expectednilai valueekspektasi]] of ''X'' (iflamun iteta existsaya) can bebisa calculateddiitung asku
 
:<math>\operatorname{E}(X)=\int_{-\infty}^\infty x\,f(x)\,dx</math>
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