dimensionless ratio confidence level adapted from wikipedia: https://en.wikipedia.org/wiki/Confidence_interval and from: http://www.oxfordreference.com/view/10.1093/acref/9780191792236.001.0001/acref-9780191792236-e-103?rskey=tQCMI6&result=1 the frequency (i.e., the proportion) of possible confidence intervals that contain the true value of their corresponding parameter. In other words, if confidence intervals are constructed using a given confidence level in an infinite number of independent experiments, the proportion of those intervals that contain the true value of the parameter will match the confidence level. A probability measure of the reliability of an inferential statistical test that has been applied to sample data and which is provided along with the confidence interval for the output statistic. Philippe Rocca-Serra ready for release