👉 Overnormality, also known as excess kurtosis, is a statistical measure that describes how much of the data in a distribution deviates from its normal or Gaussian shape. In other words, it measures the degree to which the tails of the distribution are longer than they should be. The term "overnormality" refers to situations where the majority of observations fall within a certain range of values, with a few outliers that lie outside this range. This can occur for a variety of reasons,
