[R] Interpreting ANOVA / quantile regression results

[Bert Gunter]

This is off topic here.Post to a statistics forum like
stats.stackexchange.com instead -- or talk to your professor or TA (if
you're a student).

Cheers,
Bert

Bert Gunter
Genentech Nonclinical Biostatistics
(650) 467-7374

"Data is not information. Information is not knowledge. And knowledge
is certainly not wisdom."
Clifford Stoll




On Fri, Nov 21, 2014 at 8:56 PM, Yunqi Zhang <yqzhang at ucsd.edu> wrote:
> Hi all,
>
> I think this is probably a very simple question related to ANOVA or
> quantile regression.
>
> Let's say if I'm doing ANOVA on 2 factors (f_a and f_b) and trying to
> figure out whether they have an impact on the output. The result shows me
> that f_a has a significant impact while f_b does not as following, where
> the std. error (confidence interval) is
>
>          estimate    std. error      p-value
> f_a    10              0.2               0.001
> f_b    0.5             2                  0.56
>
> If I take this result, and I want to make my best guess for the output of a
> pair of f_a and f_b values. Should I calculate the output using both f_a
> and f_b or only the f_a because f_b is statistically insignificant? And
> what the std. error (confidence interval) would be?
>
> Specifically, should I do
>
> guessed output = 10 * f_a + 0.5 * f_b and the std. error is 0.2 + 2 = 2.2
>
> or
>
> guessed output = 10 * f_a and the std.err is 0.2
>
> Thank you very much!
>
> Yunqi
>
>         [[alternative HTML version deleted]]
>
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