### Formula

SNR

signal-to-noise ratio

mu

the signal mean or expected value

sigma

the standard deviation of the noise, or an estimate

SNR

signal-to-noise ratio

mu

the signal mean or expected value

sigma

the standard deviation of the noise, or an estimate

An alternative definition of SNR is as the reciprocal of the coefficient of variation, i.e., the ratio of mean to standard deviation of a signal or measurement.

mu

sigma

SNR

Precision

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