Takes in a vector with values in [0, 1]. It sorts the values to get the order
statistics and calculates p-values for each of the order statistics. These are based
on their expected distribution under the null hypothesis of uniform distribution.
In RRA algorithm context the inputs are supposed to be normalized ranks. However,
p-values in general follow the uniform distribution, therefore it can be used with any
kind of p-value vectors, to see if there are more small values than expected.
The NA values are removed before calculation and all results take into account only
existing values.