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Results tagged with variance
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user 5654
The expected squared deviation of a random variable from its mean; or, the average squared deviation of data about their mean.
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Variance of resistors in parallel
In any case, we can calculate the mean and variance of the resistance of the circuit in linear approximation, and then the exact form of the distribution is irrelevant. … In linear approximation, the mean and variance of the reciprocal of a random variable with mean $\mu$ and variance $\sigma^2$ are $1/\mu$ and $\sigma^2/\mu^4$, respectively. …
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