Uncertainty is an estimate of error in mathematical
terms. This expression must be defined exactly and is typically
expressed using the standard deviation. Where error is the difference
between the true value and a result or the mean, the uncertainty is an expression involving a calculation where the deviation (difference
between mean and individual result) is used. The hope is that the true
value (which will never be known by man) is within the expressed
uncertainty under the specified conditions.
The term "uncertainty" was found in the following pages: