[R] 2 Sample Confidence Interval - Formatting Data?

Wayne Aldo Gavioli wgavioli at fas.harvard.edu
Wed Oct 10 00:37:26 CEST 2007

Hello all,

I have to run a 2 Sample Confidence Interval on some data; the command for such
intervals is "confint(...)", but in the help documentation it says that you
need a "fitted model object" in order to run this command.  What does that

The data is very small, it's:


and I want to be able to run a Confidence interval for the difference of two
means (x-bar minus y-bar).  Do I have to fit these two pieces of data into some
kind of object?

A little confused,


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