I was under the impression that the likelihood function was simply the probability density function but viewing the parameter theta as the variable instead of the observations x. Ie(adsbygoogle = window.adsbygoogle || []).push({});

p(x|theta) = L(theta|x)

However, the likelihood function is no longer a probability function

See Example 1 here:

http://en.wikipedia.org/wiki/Likelihood_function

Can anyone explain this a little bit?

Thanks,

Dave

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

Dismiss Notice

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!

# Determining the Likelihood function

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