[R] Nested unbalanced regression analysis

[Wil M Contreras Arbaje]

Whoa, easy there: members of the list are volunteers, allow some time  
before expecting a reply...

	
On Sep 30, 2010, at 3:19 PM, Robert Quinn wrote:

> Hello, I am having a problem figuring out how to model a continuous  
> outcome
> (y) given a continuous predictor (x1) and two levels of nested  
> categorical
> predictors (x3 nested in x2). The data are observational, not from a
> designed experiment. There are about 15 levels of x2 and between 3  
> and 14
> levels of x3 nested within each level of x2. There are between 6 and  
> 50 x1
> and y observations for each unique x3 (i.e. the data are  
> unbalanced). I
> would like to get a prediction equation for y based on x1 and the  
> levels of
> x2 and x3, and be able to test for significant effects of the levels  
> of x2
> and x3. The variables x2 and x3 are drawn from a fixed population.   
> I deeply
> appreciate your assistance if available to assist.  R/Bob
>
>
>
>
> 	[[alternative HTML version deleted]]
>
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