Dear all,
I need an help because I don´t know how to perform the analysis in the right
way, as I get different beheaviors using t-test and two ways ANOVA.
In what follow I post the table, my goal and the strange results I got.
I kindly ask you an help because I really don´t know how to solve
and understand.
Please enlighten me.
Thanks in advance
Best regards
From: Tal Galili tal.gal...@gmail.com
To: Frodo Jedi frodo.j...@yahoo.com
Cc: r-help@r-project.org
Sent: Wed, January 5, 2011 10:15:41 AM
Subject: Re: [R] t-test or ANOVA...who wins? Help
Dear all,
I would like to know which is the right way to check the normality assumption
for performing ANOVA. How do you check normality for the following example?
I did an experiment where people had to evaluate on a 7 point scale, the
degree
of realism of some stimuli presented in 2
Dear all,
I have 3 models (from simple to complex) and I want to compare them in order to
see if they fit equally well or not.
From the R prompt I am not able to see where I can get this information.
Let´s do an example:
fit1- lm(response ~ stimulus + condition + stimulus:condition, data=scrd)
Message-
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-
project.org] On Behalf Of Frodo Jedi
Sent: Wednesday, January 05, 2011 10:10 AM
To: r-help@r-project.org
Subject: [R] Comparing fitting models
Dear all,
I have 3 models (from simple to complex) and I want
Dear Robert,
thanks so much!!! Now I understand!
So you also think that I have to check only the residuals and not the data
directly.
Now just for curiosity I did the the shapiro test on the residuals. The problem
is that on fit3 I don´t get from the test
that the data are normally
...@imail.org
801.408.8111
-Original Message-
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-
project.org] On Behalf Of Frodo Jedi
Sent: Wednesday, January 05, 2011 10:10 AM
To: r-help@r-project.org
Subject: [R] Comparing fitting models
Dear all,
I have 3 models (from
Dear All,
I have a problem in understanding how the interactions of 2 ways ANOVA work,
because I get conflicting results
from a t-test and an anova. For most of you my problem is very simple I am sure.
I need an help with an example, looking at one table I am analyzing. The table
is in
-
project.org] On Behalf Of Frodo Jedi
Sent: Wednesday, January 05, 2011 4:10 PM
To: r-help@r-project.org
Subject: [R] Problem with 2-ways ANOVA interactions
Dear All,
I have a problem in understanding how the interactions of 2 ways ANOVA
work,
because I get conflicting results
from a t-test
[mailto:r-help-boun...@r-
project.org] On Behalf Of Frodo Jedi
Sent: Wednesday, January 05, 2011 3:22 PM
To: Robert Baer; r-help@r-project.org
Subject: Re: [R] Assumptions for ANOVA: the right way to check the
normality
Dear Robert,
[[elided Yahoo spam]]
So you also think that I have to check
-
project.org] On Behalf Of Frodo Jedi
Sent: Wednesday, January 05, 2011 3:22 PM
To: Robert Baer; r-help@r-project.org
Subject: Re: [R] Assumptions for ANOVA: the right way to check the
normality
Dear Robert,
[[elided Yahoo spam]]
So you also think that I have to check only the residuals
Dear all,
I need to understand a thing in the beheaviour of the two functions aov and
anova in the following case
involving an analysis of ANOVA with repeated measures:
If I use the folowing command I don´t get any problem:
aov1 = aov(response ~ stimulus*condition +
.
From: r-help-boun...@r-project.org [r-help-boun...@r-project.org] On Behalf Of
Frodo Jedi [frodo.j...@yahoo.com]
Sent: 08 January 2011 01:51
To: r-help@r-project.org
Subject: [R] anova vs aov commands for anova with repeated measures
Dear all,
I need
until you have more
training and experience.
--
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.s...@imail.org
801.408.8111
From: Frodo Jedi [mailto:frodo.j...@yahoo.com]
Sent: Thursday, January 06, 2011 12:57 PM
To: Greg Snow; r-help@r
Dear Dieter,
thanks a lot for your answer.
Don´t you mind to do an example of the use of the command?
For example, in attachment you find a .csv table resulting from an experiment,
you can access it by means of this command:
scrd-
Dear all,
I need an help because I am really not able to find over internet a good example
in R to analyze an unbalanced table with Anova with repeated measures.
For unbalanced table I mean that the questions are not answered all by the same
number of subjects.
For a balanced case I would use
Hi Ben,
many many thanks!!
From: Ben Bolker bbol...@gmail.com
To: r-h...@stat.math.ethz.ch
Sent: Sat, January 8, 2011 9:39:20 PM
Subject: Re: [R] Anova with repeated measures for unbalanced design
Frodo Jedi frodo.jedi at yahoo.com writes:
Dear all,
I
Dear all,
how can I perform a post hoc analysis for ANOVA with repeated measures (in
presence of a balanced design)?
I am not able to find a good example over internet in R...is there among you
someone so kind to give
me an hint with a R example please?
For example, the aov result of my
Sent: Sat, January 8, 2011 9:39:20 PM
Subject: Re: [R] Anova with repeated measures for unbalanced design
Frodo Jedi frodo.jedi at yahoo.com writes:
Dear all,
I need an help because I am really not able to find over
internet a good example
in R to analyze an unbalanced table with Anova
-
project.org [mailto:r-help-boun...@r-
project.orghttp://project.org] On Behalf Of Frodo Jedi
Sent: Wednesday, January 05, 2011 3:22 PM
To: Robert Baer; r-help@r-project.orgmailto:r-help@r-project.org
Subject: Re: [R] Assumptions for ANOVA: the right way to check the
normality
Dear Robert
Many many thanks for your feedback Greg.
You have been very enlightening for me.
Now is time for me to study the material you kindly provided me. Thanks.
From: Greg Snow greg.s...@imail.org
Cc: r-help@r-project.org r-help@r-project.org
Sent: Tue, January
Dear list members,
I need some help in understanding whether I am doing correctly a binomial
logistic regression and whether I am interpreting the results in the
correct way. Also I would need an advice regarding the reporting of the
results from the R functions.
I want to report the results of a
istical results and their
> presentation. Again your text seems to as good as any other.
>
>
>
> You should keep responses to mailing list as others could have another
> opinion.
>
>
>
> Cheers
>
> Petr
>
>
>
>
>
> *From:* Frodo Jedi
> *Sent:* Monday, Nove
nt
> at the 5% level, which can be inferred from glm output. Your last two
> wald.tests don't test what you want to, since your model contains an
> intercept term. You specified contrasts which tests A vs B-A, ie A-
> (B-A)==0 <-> 2*A-B==0 which is not intended I think. Have a look at
in online
> forums like this that cannot provide the close back and forth that may be
> required (as well as further appropriate study).
>
> Best,
> Bert
>
> On Mon, Nov 12, 2018 at 11:09 AM Frodo Jedi <
> frodojedi.mailingl...@gmail.com> wrote:
>
>> Dear Pete
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