InfluentialPoints.com
Biology, images, analysis, design...
Use/Abuse Principles How To Related
"It has long been an axiom of mine that the little things are infinitely the most important" (Sherlock Holmes)

Search this site

 

 

Just a note

Notice how, on the QQ plots, values are distributed unevenly along the line - y1 being normal most of them are clustered in its mid-region. Because the sample sizes were relatively large (n=90) these theoretical quantiles are almost identical to the normal rankits.

PP values are distributed evenly along the line - and their deviations are opposite to those of the QQ plots. More importantly, notice that PP plots are rather less sensitive to deviations from normal.