ABSTRACT

The conformity test of the classic nonparametric average is the Wilcoxon paired sample (Morgenthaler, 1997). We will use the same assumptions as in the parametric case above – Student’s test – namely:

(9.19)

The Wilcoxon score for a single sample is expressed by the following relation

(9.20)

where, R+ is the signed rank, or the rank with the absolute value of the signed observation, where sign (u) is equal to 1 if u > 0, otherwise it is equal to zero.