geomodel...@gmail.com geomodel...@gmail.com*
09/30/2014 11:54 PM
To
jlu...@ria.buffalo.edu,
cc
Duncan Murdoch murdoch.dun...@gmail.com, r-help@r-project.org
r-help@r-project.org, r-help-boun...@r-project.org
Subject
Re: [R] Inverse Student t-value
Hi JLucke,
Maybe the old excel
The manual formula mean that how to calculate that value by hand for
TINV(0.408831, 1221) and the resulted is 4.0891672
This is not really an R help question - you're specifically asking for
something that _doesn't_ use R - but if you want to know how R does it the full
C and R code for
Andre geomodel...@gmail.com
10/02/2014 07:27 AM
To
jlu...@ria.buffalo.edu,
cc
Duncan Murdoch murdoch.dun...@gmail.com, r-help@r-project.org
r-help@r-project.org, r-help-boun...@r-project.org
Subject
Re: [R] Inverse Student t-value
Dear All,
The manual formula mean that how to calculate
-boun...@r-project.org
09/30/2014 02:45 PM
To
Duncan Murdoch murdoch.dun...@gmail.com,
cc
r-help@r-project.org r-help@r-project.org
Subject
Re: [R] Inverse Student t-value
Hi Duncan,
Let me explain again, I just need a manual expression for inverse student t
value.
You could go
Dear Sir/Madam,
I am trying to use calculation for two-tailed inverse of the student`s
t-distribution function presented by Excel functions like
=TINV(probability, deg_freedom).
For instance: The Excel function =TINV(0.408831,1221) = returns
4.0891672.
Would you like to show me a manual
On 30/09/2014 1:31 PM, Andre wrote:
Dear Sir/Madam,
I am trying to use calculation for two-tailed inverse of the student`s
t-distribution function presented by Excel functions like
=TINV(probability, deg_freedom).
For instance: The Excel function =TINV(0.408831,1221) = returns
On 30/09/2014 2:11 PM, Andre wrote:
Hi Duncan,
No, that's correct. Actually, I have data set below;
Then it seems Excel is worse than I would have expected. I confirmed
R's value in two other pieces of software,
OpenOffice and some software I wrote a long time ago based on an
algorithm
And, with 1221 degrees of freedom, one cannot be far off a Normal
distribution. So:
abs(qnorm(0.408831/2))
[1] 4.102431
which is nearer to Duncan's answer (4.117, and a bit smaller, as it
should be) than to yours (4.0891672, which, if accurate, should
be greater than the Normal value
On 30/09/2014 2:26 PM, Andre wrote:
Hi Duncan,
Actually, I am trying trace the formula for the Critical value of Z
and manual formula is
=(I7-1)/SQRT(I7)*SQRT((TINV(0.05/I7,I7-2))^2/(I7-2+TINV(0.05/I7,I7-2)))
So, I got new problem for TINV formula. I just need a manual equation
for TINV.
: [R] Inverse Student t-value
On 30/09/2014 2:26 PM, Andre wrote:
Hi Duncan,
Actually, I am trying trace the formula for the Critical value of Z
and manual formula is
=(I7-1)/SQRT(I7)*SQRT((TINV(0.05/I7,I7-2))^2/(I7-2+TINV(0.05/I7,I7-2)))
So, I got new problem for TINV formula. I just
/2014 02:36 PM
To
Andre geomodel...@gmail.com,
cc
r-help@r-project.org
Subject
Re: [R] Inverse Student t-value
On 30/09/2014 2:26 PM, Andre wrote:
Hi Duncan,
Actually, I am trying trace the formula for the Critical value of Z
and manual formula is
=(I7-1)/SQRT(I7)*SQRT
On 30 Sep 2014, at 20:36 , Duncan Murdoch murdoch.dun...@gmail.com wrote:
TINV(0.408831,1221)
Just for the record: The above _does_ give
4.117456652
in Excel for Mac OS X.
--
Peter Dalgaard, Professor,
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000
Hi Duncan,
No, that's correct. Actually, I have data set below;
N= 1223
alpha= 0.05
Then
probability= 0.05/1223=0.408831
degree of freedom= 1223-2= 1221
So, TINV(0.408831,1221) returns 4.0891672
Could you show me more detail a manual equation. I really appreciate it if
you may give
Hi Duncan,
Let me explain again, I just need a manual expression for inverse student t
value.
You could go to web page
http://www.danielsoper.com/statcalc3/calc.aspx?id=10
That's inverse student t value calculator. Do you know a manual expression
use it.
Cheers!
On Wednesday, October 1,
Hi Duncan,
Actually, I am trying trace the formula for the Critical value of Z and
manual formula is
=(I7-1)/SQRT(I7)*SQRT((TINV(0.05/I7,I7-2))^2/(I7-2+TINV(0.05/I7,I7-2)))
So, I got new problem for TINV formula. I just need a manual equation
for TINV.
Hope solve this problem.
Cheers!
On
-Original Message-
From: r-help-boun...@r-project.org [mailto:r-help-bounces@r-
project.org] On Behalf Of jlu...@ria.buffalo.edu
Sent: Tuesday, September 30, 2014 11:49 AM
To: Andre
Cc: r-help@r-project.org
Subject: Re: [R] Inverse Student t-value
My Excel (2013) returns exactly
...@gmail.com
Sent by: r-help-boun...@r-project.org
09/30/2014 02:45 PM
To
Duncan Murdoch murdoch.dun...@gmail.com,
cc
r-help@r-project.org r-help@r-project.org
Subject
Re: [R] Inverse Student t-value
Hi Duncan,
Let me explain again, I just need a manual expression for inverse student
t
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