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#1 2013-04-07 13:28:30

White_Owl
Member
Registered: 2010-03-03
Posts: 99

How to find a number of trials?

How to find n in the equation:


Here cdf_binomial() is a distribution function  of binomial random variable:

By trial and error I found that n=164. But is it possible to express n for a direct calculation? How did people solve such problems before the age of computers?

Last edited by White_Owl (2013-04-07 13:29:24)

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#2 2013-04-07 13:57:45

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 89,048

Re: How to find a number of trials?


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

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