Lixiaoxu
Membre des de 6 jul 2009
→Noncentral t
| Línia 342: | Línia 342: | ||
It is different from the random variable <math>V + ncp = \sum_{i=1}^{df}{Z_i}^2 + \sum_{i=1}^{df}{\mu_i}^2</math> of the respective central <math>\chi^2</math> distribution with a central drift. | It is different from the random variable <math>V + ncp = \sum_{i=1}^{df}{Z_i}^2 + \sum_{i=1}^{df}{\mu_i}^2</math> of the respective central <math>\chi^2</math> distribution with a central drift. | ||
===Noncentral | ===Noncentral t=== | ||
For any given constant <math>\mu_0</math>, | For any given constant <math>\mu_0</math>, | ||
:<math> \frac{Z_0+\mu_0}{\sqrt{V/df }} =</math><math>\frac{Z_0+\mu_0}{\sqrt{\sum_{i=1}^{df}{Z_i}^2/df}}</math> | :<math> \frac{Z_0+\mu_0}{\sqrt{V/df }} =</math><math>\frac{Z_0+\mu_0}{\sqrt{\sum_{i=1}^{df}{Z_i}^2/df}}</math> | ||