- noun a range of statistical values within which a result is expected to fall with a specific probability
- noun a means of quantifying a margin for error in statistical analysis; the interval gives an estimated range of values for a certain unknown parameter – the wider the interval, the more likely is an error in interpreting the parameter and more data should be collected
- An interval or range of values within which the theoretical probability of an event occurring may be specified. For instance, the probability of a failure occurring within a given time period. The wider the interval, the greater the confidence that the event will occur.