)
Joe
Andre
10/02/2014 07:27 AM
To
jlu...@ria.buffalo.edu,
cc
Duncan Murdoch , "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 that value by hand for
TINV(0.408831, 1221) a
> 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
e >*
>
> 09/30/2014 11:54 PM
> To
> jlu...@ria.buffalo.edu,
> cc
> Duncan Murdoch , "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,
>
..@r-project.org
>
> 09/30/2014 02:45 PM
> To
> Duncan Murdoch ,
> cc
> "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
&
Andre
Sent by: r-help-boun...@r-project.org
09/30/2014 02:45 PM
To
Duncan Murdoch ,
cc
"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 to web page
h
> -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
>
&
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 We
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, 2014,
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 mo
On 30 Sep 2014, at 20:36 , Duncan Murdoch 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 Frederiksberg, Denmark
Phone: (
t.org
> 09/30/2014 02:36 PM
>
> To
> Andre ,
> 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 fo
My Excel (2013) returns exactly what R does. I used both T.INV and
T.INV.T2There is no TINV. Has Excel been updated?
Duncan Murdoch
Sent by: r-help-boun...@r-project.org
09/30/2014 02:36 PM
To
Andre ,
cc
r-help@r-project.org
Subject
Re: [R] Inverse Student t-value
On 30/09
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.
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 4.10
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 publ
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
4.0891672.
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 ca
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