Re: questions about chi square and g test

On Apr 15, 7:33 pm, Richard Ulrich <Rich.Ulr...@[EMAIL PROTECTED]
> wrote:
> On Tue, 15 Apr 2008 11:28:19 -0700 (PDT), ouyang....@[EMAIL PROTECTED]
 wrote:
> > Hi,
> > I am new to statistics. I got couple questions about chi square and g
> > independence test. For chi square test, how do I handle all zero
> > columns in cross tables? Should those columns be included in the
> > table? all zero columns will give zero expectation for cells in those
> > columns and cause divided by zero errors.. For g test, what to do if
> > some cells have zero observations? That will cause log of zero error.
>
> For the ordinary contingency table, you drop
> any rows or columns that total zero.
>
> --
> Rich Ulrich
>
> http://www.pitt.edu/~wpilib/index.html

Thank you. How about zero cells in G test?