Dennis also included [EMAIL PROTECTED] among his addressees,
but I am not on that list and therefore cannot reply to them...
On Tue, 6 Mar 2001, dennis roberts wrote:
> may eons ago ... 1974 to be precise ... i had this idea of making a
> small plastic normal and skewed curve template ... that would help
> students draw both types ... with information about the distributions
> on the template ... that would help them work with problems by being
> able to make a nice sketch ...
Yes. I had such a template for years, and found it very useful, both for
preparing handouts and overheads. I don't know where it is now -- it got
lost at some point -- and I don't remember where I came across it in the
first place, nor exactly when (about 1980, I would guess). Both curves
side by side comprising most of the long edge of a template about 7
inches long, an internal straight line in two segments representing the
usual X-axis, with printed marks for mean and +/- 1, 2, 3, s.d.'s for
both distributions.
> if anyone is interested in a historical artifact (relic?) ...
> have a look at
>
> http://roberts.ed.psu.edu/users/droberts/statmat.jpg
>
> i still think it WAS a good idea ... just didn't have the right
> "marketing" team in place
Yes, it was. But somebody evidently did.
-- Don.
----------------------------------------------------------------------
Donald F. Burrill [EMAIL PROTECTED]
348 Hyde Hall, Plymouth State College, [EMAIL PROTECTED]
MSC #29, Plymouth, NH 03264 (603) 535-2597
Department of Mathematics, Boston University [EMAIL PROTECTED]
111 Cummington Street, room 261, Boston, MA 02215 (617) 353-5288
184 Nashua Road, Bedford, NH 03110 (603) 471-7128
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