Tuesday, November 18, 2008

Binomial Probability Calculator

I found a helpful web site, stattrek.com. Stat Trek, get it?  I needed to calculate the probability of only having one failure out of 248 tries. I know this is a binomial distribution problem and wanted to find an on-line calculator. The probability of a failure in the current population is 0.0204.

I wanted to know the probability that at least 1 fails. P(X ≤ 1) = P(X =0) + P(X=1) There are a bunch of on-line calculators that will tell you the binomial probability as well as the cumulative probability. Stattrek has a decent one. They also have tutorials.

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