# Binomial, Geometric, Negative Binomial, Hypergeometric Distribution

• Aug 8th 2012, 10:09 AM
PennCow
Binomial, Geometric, Negative Binomial, Hypergeometric Distribution
Is there an efficient way to identify which distribution a probability is in? I been doing the chapter exercises to no avail... I keep mixing out geometric and negative binomial... & sometimes we get a None of the above answer :(!!!

Can someone brief me regarding the important criterias for each distribution? I already know how to use the formulas and stuff, but I don't know how to get from not knowing which distribution apply to which does (so I can use the appropriate formula).

Thanks!
• Aug 8th 2012, 10:22 AM
Plato
Re: Binomial, Geometric, Negative Binomial, Hypergeometric Distribution
Quote:

Originally Posted by PennCow
Is there an efficient way to identify which distribution a probability is in? I been doing the chapter exercises to no avail... I keep mixing out geometric and negative binomial... & sometimes we get a None of the above answer

I actually discourage students from naming, Binomial, Geometric, Negative Binomial, Hypergeometric Distribution. Rather I spend a great deal of time on their learning basic counting rules. In most discrete cases if one knows how to count the total outcomes it is easy to apply the counting principles to the elementary events.
• Aug 8th 2012, 11:00 AM
PennCow
Re: Binomial, Geometric, Negative Binomial, Hypergeometric Distribution
How should I do it then? The question specifically asks for which distribution the probability falls under :(...
• Aug 8th 2012, 11:03 AM
Plato
Re: Binomial, Geometric, Negative Binomial, Hypergeometric Distribution
Quote:

Originally Posted by PennCow
How should I do it then? The question specifically asks for which distribution the probability falls under :(...

Well in that case you must learn which is which. I guess you fall back upon notes/textbook.