I can't help but be reminded of learning to ride a bicycle. 99.% of
people ride one with two wheels (natch!) - but many children do start to
learn with training wheels..
Alan
dennis roberts wrote:
>
> the fundamental issue here is ... is it reasonably to expect ... that when
> you are m
dennis roberts wrote:
>
> the fundamental issue here is ... is it reasonably to expect ... that when
> you are making some inference about a population mean ... that you will
> KNOW the variance in the population?
No, Dennis, of course it isn't - at least in the social sciences and
usu
the fundamental issue here is ... is it reasonably to expect ... that when
you are making some inference about a population mean ... that you will
KNOW the variance in the population?
i suspect that the answer is no ... in all but the most convoluted cases
... or, to say it another way ... i
Jon Cryer wrote:
>
> These examples come the closest I have seen to having a known variance.
> However, often measuring instruments, such as micrometers, quote their
> accuracy as a percentage of the size of the measurement. Thus, if you
> don't know the mean you also don't know the variance.
At 1:18 PM -0500 23/4/01, Jon Cryer wrote:
>These examples come the closest I have seen to having a known variance.
>However, often measuring instruments, such as micrometers, quote their
>accuracy as a percentage of the size of the measurement. Thus, if you
>don't know the mean you also don't kno
These examples come the closest I have seen to having a known variance.
However, often measuring instruments, such as micrometers, quote their
accuracy as a percentage of the size of the measurement. Thus, if you
don't know the mean you also don't know the variance.
Jon Cryer
At 09:28 AM 4/23/01
It's also called a test of homogeneity of regression slopes, but it is really just a an interaction. There is also a test of parallelism in profile analysis which tends to confuse the issue. I sometimes wonder if it is worth it to try and give all these tests names. An interaction is always a test
> Date: Fri, 20 Apr 2001 13:02:57 -0500
> From: Jon Cryer <[EMAIL PROTECTED]>
>
> Could you please give us an example of such a situation?
>
> ">Consider first a set of measurements taken with
> >a measuring instrument whose sampling errors have a known standard
> >deviation (and approximately n
