English grammer

http://www.writewithjean.com/join-the-writing-revolution/for-students/write-a-research-paper/


http://www.learnamericanenglishonline.com/Violet%20Level/V3%20Consequently.html

Probability to exceed

https://www.fourmilab.ch/rpkp/experiments/analysis/chiCalc.html

Kolmogorov-Smirnov Test

http://www.physics.csbsju.edu/stats/KS-test.html