part of
statistical hypothesis test objective
null hypothesis
Orlaith Burke
A null hypothesis is a statistical hypothesis that is tested for possible rejection under the assumption that it is true (usually that observations are the result of chance). The concept was introduced by R. A. Fisher.
The hypothesis contrary to the null hypothesis, usually that the observations are the result of a real effect, is known as the alternative hypothesis.[wolfram alpha]
Alejandra Gonzalez-Beltran
Philippe Rocca-Serra
http://mathworld.wolfram.com/NullHypothesis.html
hypothesis
alternative hypothesis
ready for release