These indices are based on data from a large number of indicators collected through the Varieties of Democracy (V-Dem) project. We present and discuss the theoretical considerations and the concrete ...

Many statistical procedures used in educational research are described as requiring that dependent variables follow a normal distribution, implying an interval scale of measurement. Despite the ...

Nonparametric statistics refer to a statistical method in which the data is not required to fit a normal distribution. Rankings should not change.