calculate difference means when groups have different (n)

O

Oscar

I need to run a test for a diference between means when the groups have
different numbers (n). Please post to newsgroups or remove the pound sign
in return address.
 
S

Stan Brown

Fri said:
I need to run a test for a diference between means when the groups have
different numbers (n). Please post to newsgroups or remove the pound sign
in return address.
Click to expand...

Enable the Analysis Toolpak and Analysis Toolpak -VBA in Tools | Add-
ins. (If they're not listed there, you'll run the Office installer to
make them available.)

Then click Tools | Data Analysis and select one of the two-sample t
tests.
 
J

Jerry W. Lewis

See Help for the TTEST worksheet function. Only Type=1 requires both groups
to be the same size.

Jerry
 
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