[R] 2 Sample Confidence Interval - Formatting Data?

[Nordlund, Dan (DSHS/RDA)]

> -----Original Message-----
> From: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of Wayne Aldo Gavioli
> Sent: Tuesday, October 09, 2007 3:37 PM
> To: r-help at stat.math.ethz.ch
> Subject: [R] 2 Sample Confidence Interval - Formatting Data?
> 
> 
> 
> 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
> mean?
> 
> The data is very small, it's:
> 
> x=c(8,12,10,14,2,0,0)
> y=c(-6,0,1,2,-3,-4,2)
> 
> 
> 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,
> 
> 
> Wayne
> 

Wayne,

You may want to look at ?t.test instead.

Hope this is helpful,

Dan

Daniel J. Nordlund
Research and Data Analysis
Washington State Department of Social and Health Services
Olympia, WA  98504-5204