R help - Nov 2010 - Changing the Significance Level in R for Hypothesis Tests and Regression Analysis

Hi,

I have been unable to find how to go about changing the significance level
in R for hypothesis testing and regression analysis. R has a default setting
to alpha=95% (a significance level of 95%), but I want to be able to
decrease or increase this level when necessary. If you could give me
instructions on how to change the significance level in R for hypothesis
testing and regression analysis I would appreciate it.

Thanks,

-- 
Daniel Carawan
Master's of Environmental Studies '12
(804) 263-3116

	[[alternative HTML version deleted]]

I may be missing something, but the results of lm just give you a
p-value and then you are in charge of setting a significance level.
And as for hypothesis testing- like t-tests you are also in charge of
the significance level.  Am I missing something?

On Sat, Nov 20, 2010 at 10:41 AM, Daniel Carawan <carawandr at vcu.edu>
wrote:
> Hi,
>
> I have been unable to find how to go about changing the significance level
> in R for hypothesis testing and regression analysis. R has a default
setting
> to alpha=95% (a significance level of 95%), but I want to be able to
> decrease or increase this level when necessary. If you could give me
> instructions on how to change the significance level in R for hypothesis
> testing and regression analysis I would appreciate it.
>
> Thanks,
>
> --
> Daniel Carawan
> Master's of Environmental Studies '12
> (804) 263-3116
>
> ? ? ? ?[[alternative HTML version deleted]]
>
> ______________________________________________
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> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>


-- 
Stephen Sefick
____________________________________
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| Department of Biological Sciences? ? ? ? ?? |
| 331 Funchess Hall? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? |
| Auburn, Alabama? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?? |
| 36849? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? |
|___________________________________|
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| http://www.auburn.edu/~sas0025? ? ? ? ? ?? |
|___________________________________|

Let's not spend our time and resources thinking about things that are
so little or so large that all they really do for us is puff us up and
make us feel like gods.? We are mammals, and have not exhausted the
annoying little problems of being mammals.

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? -K. Mullis

"A big computer, a complex algorithm and a long time does not equal
science."

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? -Robert Gentleman

On Nov 20, 2010, at 11:41 AM, Daniel Carawan wrote:
> Hi,
>
> I have been unable to find how to go about changing the significance  
> level
> in R for hypothesis testing and regression analysis. R has a default  
> setting
> to alpha=95% (a significance level of 95%), but I want to be able to
> decrease or increase this level when necessary. If you could give me
> instructions on how to change the significance level in R for  
> hypothesis
> testing and regression analysis I would appreciate it.
The lm() page refers you to the predict.lm() page for confidence  
intervals.

-- 

David Winsemius, MD
West Hartford, CT