# Statistical Null Hypothesis

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A Statistical Null Hypothesis is a null hypothesis that an observation sample is the result of chance/random process.

**Context:**- It can be an input to a Statistical Hypothesis Test Task.
- …

**Counter-Example(s):**- a Legal Null Hypothesis, such as
*the defendant is not guilty.*.

- a Legal Null Hypothesis, such as
**See:**Statistical Alternative Hypothesis.

## References

### 2009

- http://www.introductorystatistics.com/escout/main/Glossary.htm
- QUOTE: The presumed model (such as that of a fair coin) in hypothesis testing. The data provide a measure of how weak or strong the evidence for or against this null hypothesis is; it is the model of step 1 if the six-step method is being used.

### 2008

- (Upton & Cook, 2008) ⇒ Graham Upton, and Ian Cook. (2008). “A Dictionary of Statistics, 2nd edition revised." Oxford University Press. ISBN:0199541450
- QUOTE: The hypothesis, in a hypothesis test, which is used to obtain the probability distribution, and hence the critical region, of the statistic used in the test. The phrase ‘
*null hypothesis*’ was introduced by Sir Ronald Fisher in 1935.

- QUOTE: The hypothesis, in a hypothesis test, which is used to obtain the probability distribution, and hence the critical region, of the statistic used in the test. The phrase ‘