so by definition, the likelyhood function(w, theta) is the product of the pdf fw(w, theta) evalutated at n data points.(adsbygoogle = window.adsbygoogle || []).push({});

but I dont know how they do those calculations.....

so for example:

fy(y, theta) = [tex]1/\theta^2 ye^{-y/\theta}[/tex]

L(theta) = [tex] \theta^{-2n}\prod y_{i}e^{-1/\theta}\sum y_{i} [/tex]

so first of all, I'm looking at this but I dont know how they went from this to that....I look at another problme

how did they go from [tex] e^{-(y-\theta)} [\tex]to [tex] \pro e^{-(y_{i}- \theta)} [/tex] [/theta]

I dotn see a pattern...I compared it w/ the definitoin, but I just dont get it....

I mean, when they did the L(theta) it seems that they added some "n' and i's somewhere....and I dotn know where they added these things.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Maximum likelyhood extimater(MLE)

**Physics Forums | Science Articles, Homework Help, Discussion**