order of moment

1-order moment http://en.wikipedia.org/wiki/Moment_%28mathematics%29
2-order skewness http://www.uib.no/People/ngbnk/kurs/notes/node34.html
4-order kurtosis http://www.uib.no/People/ngbnk/kurs/notes/node35.html
http://pygsl.sourceforge.net/reference/pygsl/node31.html

Correlation coefficient

http://noppa5.pc.helsinki.fi/koe/corr/cor7.html
http://en.wikipedia.org/wiki/Correlation_coefficient

i.i.d. = independent and identically-distributed

http://en.wikipedia.org/wiki/Independent_and_identically-distributed_random_variables
http://www.stat.ncku.edu.tw/BGSF/dissemination/talk/8-7.txt

Jackknife cross validation, Jackknifing

http://www.faqs.org/faqs/ai-faq/neural-nets/part3/section-12.html
http://bartok.ucsc.edu/peter/jackboot.pdf

Degree of freedom, perfect fitting, over-fitting

http://www.creative-wisdom.com/computer/sas/df.html

Hypergeometric distribution & Binomial distribution

Hypergeometric
http://en.wikipedia.org/wiki/Hypergeometric_distribution
http://mathworld.wolfram.com/HypergeometricDistribution.html

Binomial
http://en.wikipedia.org/wiki/Binomial_distribution
http://mathworld.wolfram.com/BinomialDistribution.html

zero mean normalization and unit mean normalization

http://www.optimaldesign.com/AMHelp/Other/zeroonemeannorm.htm