What are Confidence Intervals?
Confidence intervals are general measures of the rate or risk of an event. They are defined by the risk or rate given and then using the variance or standard error are bands to determined how sure we are of the statistic. With 95% confidence intervals we are 95% confident that the true rate or risk falls between the intervals. The width of the intervals provides a good idea of how stable the statistics is, a small interval between the lower and upper bounds generally means that the statistic is stable with large intervals the statistic is not as reliable and is generally caused by a low number of observations.
