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education/statistics/Hypothesis Tests.md
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@ -52,3 +52,11 @@ The equivalent of $normalcdf$ for a t test is $tcdf$. This function returns a pe
The chance of observing at least a sample statistic, or something more extreme, if the null hypothesis is true. The chance of observing at least a sample statistic, or something more extreme, if the null hypothesis is true.
If the p-value is less than *5*%, reject the null hypothesis. If the p-value is less than *5*%, reject the null hypothesis.
If the p-value is greater than *5*%, fail to reject the null hypothesis. If the p-value is greater than *5*%, fail to reject the null hypothesis.
(Ch 28, stat 1040)
## Goodness of fit tests
The $\chi^2$ curve does not follow the normal curve. It has a long right hand tail. As the degrees of freedom go up, the curves flatten out, and the hump moves out to the right.
There will never be a $\chi^2$ statistic.
Chi is pronounced khai