# Stats q/help

1. Aug 4, 2008

### axe69

ok guys , i need an answer to this question , use both moment generating function and cummulative function to show that z=(x(bar)-$$\mu$$)/($$\sigma$$/$$\sqrt{n}$$) if x(bar) is based on a random sample of size n from a normal($$\mu$$,$$\sigma$$^2)

Last edited: Aug 4, 2008
2. Aug 6, 2008

### Focus

Sorry this question is rather vague. Do you wish to prove that a normalized normal is a normal (0,1)? The x(bar) is deceiving, as it usually means sample mean, in the case you are taking a sample mean then z is not a distribution.

3. Aug 9, 2008

### axe69

mannaged to prove it ,and jst b4 the submition date ,thnx 4 ya help