Binomial Standard Deviation
Calculate binomial standard deviation using Trials, Success probability. See the method, result interpretation, practical checks and related calculators in one place.
Formula / method
Math.sqrt(n*p*(1-p))
How to use
Use data from the same population, sample or study definition and keep paired observations aligned.
What this calculator answers
The Binomial Standard Deviation uses Trials, Success probability to calculate the requested result. The core method is Math.sqrt(n*p*(1-p)). This makes the assumptions visible so you can check whether the inputs match your situation.
How to get a useful result
Use data from the same population, sample or study definition and keep paired observations aligned.
How to interpret it
Statistical output describes the entered sample/model. It does not by itself prove causation, practical significance or that model assumptions are satisfied.
Before relying on the number
Recheck unusual inputs, confirm units and compare the result with any official quote, statement, specification or rule that applies to the real decision. Small changes in rates, time periods or measurements can materially change some results.