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The Complete Idiot's Guide to Statistics, 2nd Edition by Robert Donnelly

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The Mean and Standard Deviation for the Binomial Distribution

You can calculate the mean for a binomial probability distribution by using the following equation:
258
where:
n = the number of trials
p = the probability of a success
For Kaylee’s example, the mean of the distribution is as follows:
µ = np = (5)(0.3) = 1.5 papers
In other words, Kaylee brings back, on average, 1.5 papers every 5 days.
You can calculate the standard deviation for a binomial probability distribution using the following equation:
259
where:
q = the probability ...

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