On Thu, 20 Sep 2001 15:54:24 +0200, "JHWB" <[EMAIL PROTECTED]>
wrote:
> Hm, hope I didn't make that subject to complex, resulting in zero replies.
> But hopefully you can answer this:
>
> I have a N(20,5) distribution and based on that I generated 25 values using
> Minitab and the Calc>Random data>Normal function. The result yielded a mean
> of 19,083 and a standard deviation of 6,0148.
>
> Now, how can I compare these results numerically and graphically?
Compared numerically:
generating parameters were mean=20, SD=5;
for N=25, the observed sample has mean= 19, SD= 6,
If you assume there is a known, fixed mean=20 and SD=5,
then the SE for N=25 is 1; and the t-test is 1.0
A graphical comparison of 2+2 points is dull, and usually
is a waste of space. Especially to illustrate "nothing interesting."
There's more potential if you draw 10 or 100 samples.
> I mean, in the back of my head I have an image of a graph with a straight
> line (the basis for the values) and the plotted dots of the actual generated
> data following the line.
It is hard to describe a one-dimensional plot of 25 points,
since there is hardly anything *there* that is interesting
or useful. - I don't parse the description, above, on first try;
I don't generate a description that sounds like that one when
I do the task myself, even after several tries; so I don't know
what you are describing.
"Box-and-whisker" is a style that structures some
information. Still, one plot is not as interesting as a dozen.
--
Rich Ulrich, [EMAIL PROTECTED]
http://www.pitt.edu/~wpilib/index.html
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