At 10:58 AM 4/20/01 -0500, jim clark wrote:
> What does a t-distribution mean to a student who does not
>know what a binomial distribution is and how to calculate the
>probabilities, and who does not know what a normal distribution
>is and how to obtain the probabilities?
good question but, NO
This will happen if the drift term in the ARIMA is zero. Suppose we
call the AR coefficient "rho". Then ten periods out the forecast of
the change in the stock price is rho^10 times the current change in
the stock price. Since probably have a small rho, rho^10 is
approximately zero.
-Dick Startz
On Fri, 20 Apr 2001 13:11:02 -0400, "William Levine"
<[EMAIL PROTECTED]> wrote:
...
> A study was conducted to assess whether there were age differences in memory
> for order independent of memory for items. Two preexisting groups (younger
> and older adults - let's call this variable A) were tes
On Fri, 20 Apr 2001, William Levine wrote:
> A study was conducted to assess whether there were age differences in memory
> for order independent of memory for items. Two preexisting groups (younger
> and older adults - let's call this variable A) were tested for memory for
> order information (Y
On 20 Apr 2001, Magill, Brett wrote:
> Does anyone know of a resource that lists symbols often used in statistics
> and probability. What I am looking for is something with the symbol, its
> name, and some common uses. In particular, I would like web sources, but I
> would be grateful for any su
Jim, Dennis, list at large
I like Jim's rationale for introducing the binomial first rather than the
normal or t. I may try it next semester (too late this semester). He much
more eloquently explained why we may not wish to jump straight to the
t-test than I did.
Chris
At 10:58 AM 04/20/200
Here is a statistical issue that I have been pondering for a few weeks now,
and I am hoping someone can help set me straight.
A study was conducted to assess whether there were age differences in memory
for order independent of memory for items. Two preexisting groups (younger
and older adults -
Hi
It has been a few years since teaching intro stats to psych
students, but I too liked the sequence: binomial -> normal ->
t-distribution ...
The binomial allows students with basic probability skills to
actually calculate the probabilities for a sampling distribution.
This provides a solid
Does anyone know of a resource that lists symbols often used in statistics
and probability. What I am looking for is something with the symbol, its
name, and some common uses. In particular, I would like web sources, but I
would be grateful for any suggestions.
Best,
Brett
=
On 19 Apr 2001, Paul Swank wrote:
> I agree. I normally start inference by using the binomial and then
> then the normal approximation to the binomial for large n. It might be
> best to begin all graduate students with nonparametric statistics
> followed by linear models. Then we could get them
I don't believe anyone has bothered to define what they mean by a z-test.
There are two issues that must be dealt with: (1), What statistic is to be
used
and (2), what distribution is to be used to assess the size of that statistic.
I contend that a z "statistic," viz., (Ybar-mu0)/(sigma/sqrt(n))
nice note mike
>Impossible? No. Requiring a great deal of effort on the part of some
>cluster of folks? Definitely!
absolutely!
>There is some discussion of this very possibility in Psychology, although
>I've yet to see evidence of fruition. A very large part of the problem,
>in my mind,
On Fri, 20 Apr 2001, dennis roberts wrote:
>
> what i would like to see .. which is probably impossible in general (and
> has been discussed before) ... it a more integrated approach to data
> collection ... WITHIN THE SAME COURSE OR A SEQUENCE OF COURSES ... so that
> when you get to the ana
alan and others ...
perhaps what my overall concern is ... and others have expressed this from
time to time in varying ways ... is that
1. we tend to teach stat in a vacuum ...
2. and this is not good
the problem this creates is a disconnect from the question development
phase, the measure de
I wrote, suggesting that forthose with a little learning the Z test is a
dangerous thing,
and Rich Ulrich responded:
> Mainly, I disagree.
>
> I had read 3 or 4 statistic books and used several stat programs
> before I enrolled in graduate courses. One of the *big surprises* to
> me was to l
Dear Eric,
I'm writing my summer school course outline, and would like to know
what the budget is for outside speakers before approaching anyone. The
outline should be finished by the end of next week.
best wishes,
janeh
application/ms-tnef
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