ABSTRACT
Let us suppose that the improvement scores of a group of five patients are as given in the following data editor: https://s3-euw1-ap-pe-df-pch-content-public-u.s3.eu-west-1.amazonaws.com/9780429023309/58a45e90-6c22-48ce-9f7d-1612419219fa/content/pg324.tif"/>
