| − | '''Standard deviation''' is a measure for how much a set of values ''varies''. It allows for one to find how likely it is for a specific value to be obtained by doing a [[Z-test]]. | + | '''Standard deviation''' is a measure in [[Statistics|statistics]] for how much a set of values ''varies''. It allows for one to find how likely it is for a specific value to be obtained by doing a [[Z-test]]. |