Skewness is only well defined for univariate distributions.
The Johnson SU distribution approximation for the skewness distribution converts
a Pearson skewness measure to a normal distribution Z value. As with all large
data sets, a small skewness will show up as indicationg that the
- Original Message -
From: Peter Westfall [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Tuesday, December 21, 1999 6:45 PM
Subject: Re: adjusting marks
Bob Hayden wrote:
- Forwarded message from Peter Westfall -
Deming himself (if I remember correctly) graded everyone
Splendid.
The pot has been stirred.
Some very good responses to my stone.
I stand corrected.
DAH
- Original Message -
From: ELN/fisackson [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Monday, January 17, 2000 6:12 PM
Subject: Linear Correlation with errors in both variables
-
Your statement does not sound
My comment not seeming to be right
regarding what you originally wrote, comes from being familiar with Orthogonal
Regression. I would recommend you read
the article by Carroll and Ruppert, The Use and Misuse of Orthogonal
Regression in Linear Errors-in-Variables Models in The
Title: - Original Message -
- Original Message -
From: Zina Taran [EMAIL PROTECTED]
To: [EMAIL PROTECTED];
Ailc1 [EMAIL PROTECTED]
Sent: Saturday, January 29, 2000 6:38 PM
Subject: Re: Shareware for Computing Significance Level?
just click on the field confidence level
- Original Message -
From: haytham siala [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, February 09, 2000 2:12 PM
Subject: ANOVA data
Can I perform an ANOVA on standardized variables?
---
If you
- Original Message -
From:
Joe Ward
To: [EMAIL PROTECTED] ; [EMAIL PROTECTED] ; APSTAT-L ; Jim Faut
(Health Careers Statistics) ; Steve Zayac (Ford)
Sent: Monday, February 14, 2000 4:19
AM
Subject: Re: Linear Regression with known
intercept (Long Message)
- Original Message -
From: Anthony Pleticos [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, March 15, 2000 4:24 PM
Subject: Matrix multiplication
I don't know if I hit the correct site but would be grateful for an
answer -
it is a fundamental one. We all know that linear
- Original Message -
From: Bob Parks [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Thursday, March 30, 2000 6:44 AM
Subject: testing a coin flipper
Consider the following problem (which has a real world
problem behind it)
You have 100 coins, each of which has a different
Lots of interesting replies.
A. The "community" Denis Roberts refers to wants statistics to tell them
which is better, which of two models is the correct one, how much more will
method B cost me,then method A, which process do I use that will make me
more money, which is the best advertisment
- Original Message -
From: Michael Granaas [EMAIL PROTECTED]
Our current verbal lables leave much to be
desired. Depending on who you ask the "null hypothesis"
is a) a hypothesis of no effect (nil hypothesis) b) an
a priori false hypothesis to be rejected (straw dog hypothesis)
Except for posterior probability, none of these are tools
for the actual problems. And posterior probability is not
what is wanted; it is the posterior risk of the procedure.
But even this relies on belief. An approach to rational
behavior makes the prior a weighting measure, without
- Original Message -
From: Michael Granaas [EMAIL PROTECTED]
To: EDSTAT list [EMAIL PROTECTED]
Sent: Thursday, April 13, 2000 8:23 AM
Subject: Re: Hypothesis testing and magic - episode 2
In addition to defining the variables some areas do a better job of
defining and therefore testing
- Original Message -
From: T.S. Lim Use-Author-Address-Header@[127.1]
To: [EMAIL PROTECTED]
Sent: Tuesday, April 25, 2000 10:49 AM
Subject: Data Mining blooper
While hunting for URLs for KDCentral.com, I encountered several
misleading statements about Statistics made by Data Mining
McLean
7
Bruce
Weaver
5
Alan
Hutson
4
David
Heiser
4
Donald
Burril
4
Rich
Ulrich
4
Henry
Silvert
3
Jon
- Original Message -
From: Herman Rubin [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, May 03, 2000 8:20 AM
Subject: Re: no correlation assumption among X's in MLR
In article [EMAIL PROTECTED],
Alan McLean [EMAIL PROTECTED] wrote:
'No collinearity' *means* the X variables
- Original Message -
From: Fearless [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Tuesday, May 16, 2000 3:21 PM
Subject: Re: Statistical Libraries
Go to www.nr.com for information about "Numerical Recipes".
The C-version is free and for $89.95 you can get a CD-ROM
that contains all
- Original Message -
From: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Monday, May 22, 2000 1:15 AM
Subject: Cumulative Frequency Polygons a right way?
Hi all,
First up, the purpose I have at hand is to make interpolations for
percentages of students who have achieved above a
I have been waiting until everybody was through throwing their
stuff into the pot.
Dennis refers to Galton's works on inheritance, which is in
his book "Natural Inheritance" published in 1889. Galton is credited with
starting the idea of correlations and bivariate relationships. The table
- Original Message -
From: Eric Turkheimer [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Friday, May 26, 2000 9:09 AM
Subject: Software for Problem Construction
Has anyone ever seen software designed to generate data for the
construction of statistical problem sets? One might input
- Original Message -
From: dennis roberts [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Thursday, June 29, 2000 12:32 PM
Subject: dissertations = hack jobs
it appears that da heiser said something like(if i am in error, forgive
me):
- Original Message -
From: Gautam Sethi [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Friday, June 30, 2000 11:07 AM
Subject: convolution question
i wrote a little code in matlab that figures out the density of z = x*y
where x
and y are both uniformly distributed. in the code i
First Gautam Sethi used the term "convolution" for the product
to two (uniform) densities. Aniko responded with a definition of convolution as
the sum of two random variables. Then Jan de Leeuw stated that "convolution is
the distribution of the sum". Herman Rubin stated that "convolution is
- Original Message -
From: Jan de Leeuw [EMAIL PROTECTED]
To: Ron Bloom [EMAIL PROTECTED]; [EMAIL PROTECTED]
Sent: Thursday, July 20, 2000 7:00 PM
Subject: Re: Why quote *both* Odds Ratio and Chi^2 ?
This is one of the areas in which we cannot be precise enough. An
observed
- Original Message -
From: Gökhan BakIr [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Monday, August 07, 2000 1:07 PM
Subject: likelihood
Hi !
Please dont flame me for this question if its too foolish,
but is there a difference between a likelihood and a probability ?
thanks
- Original Message -
From: Bob Wheeler [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Friday, August 11, 2000 9:50 AM
Subject: Re: likelihood
I'll suppose that you don't really want to have a
discussion about probability, but are really
asking about 'likelihood.'
The definition of
- Original Message -
From: P.G.Hamer [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Thursday, August 17, 2000 2:40 AM
Subject: Re: likelihood
David A. Heiser wrote:
I am going to reference Fisher as his views later on in life in the 1973
3rd
edition of "Statistical
Me
- Original Message -
From: jkroger [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Sunday, August 20, 2000 9:10 AM
Subject: Which statistical test?
Hello, I am trying to determine a statistical difference, but am having
some difficulty determining what test should be used.
I have two
- Original Message -
From: Ronny Richardson [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Monday, August 28, 2000 4:10 PM
Subject: Skewness and Kurtosis Questions
Several references I have looked at define skewness as follows:
mean median: positive, or right-skewness
mean =
- Original Message -
From: Glen Barnett [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, August 30, 2000 7:45 PM
Subject: Re: Skewness and Kurtosis Questions
In reply to Ronny Richardson's question.
There's several problems.
(i) mean-median is measured in the units of the
- Original Message -
From: Vincent Vinh-Hung [EMAIL PROTECTED]
To: David A. Heiser [EMAIL PROTECTED]
Sent: Friday, September 01, 2000 12:48 AM
Subject: Re: Skewness and Kurtosis Questions
Dear Dr Heiser,
---
No, I don't have
I would like to enter the arena.
I see the original question as two questions, one about
probability in a general sense, and the second about probability as used within
Bayes Theorem. This is in line with the historical arguments.
Most statisticians (from Fisher down to the present)
- Original Message -
From: Joe Ward [EMAIL PROTECTED]
To: ap-stat [EMAIL PROTECTED]; EDSTAT-L
[EMAIL PROTECTED]
Cc: Robert A Bottenberg [EMAIL PROTECTED]; [EMAIL PROTECTED]
Sent: Monday, September 18, 2000 11:04 AM
Subject: Statistics for Visually Impaired
His long reply.
Also note
Gotcha. It is the headlines that count.
1. I appreciate professor deLeuw recommending A. W. F.
Edward's book "Likelihood" (expanded version). Read it from cover to cover.
Excellent source of ideas and analysis of Fisher's contributions.
2. The issue is, do we follow the maximum likelihood
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