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Please. Help. Trying to chose a software, not sure how to begin...

July 3, 2015, 1:11 pm
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H,

I was originally going to do a confirmatory factor analysis (CFA) on some data, but it was recommended to me that I conduct an exploratory structural equation model (ESES) instead by a very knowledgeable faculty member.

I was directed towards using MPLUS, however, it is very expensive.

Can anybody direct me towards any free software that could perform an ESES? Or perhaps let me know whether the free MPLUS demo version would be sufficient?

I don't know much about ESES at this point, including where or how to begin the process if I can't even select a software program to start working with...

Thank you very much for your time, and even more so for potentially helpful responses.

All the best.
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Excel Help

July 6, 2015, 11:05 pm
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See pic below to understand what I am talking about.
http://imgur.com/ZO6NTfd

I need help with making a drop down box. The drop down box would be placed in A2. The drop down box would contain apple, orange and grape.

When I choose from the drop down box (either apple, orange and grape) I would like their corresponding weight and height displayed in B2 (weight) and C2 (height) respectively.

How should I go about doing this?

Thank you!
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calculating effect sizes in ML-WIN

July 7, 2015, 7:38 am
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Hi!

I have run multivariate multilevel regression using MLwiN 2.30. I would like to report effect sizes for the significant main effects as well as interaction effects. These involve both continuous as well as dummy variables.

Anybody know how to do this? And if it is not possible in Ml-Win, how to calculate effect sizes in another way?

Thanks!
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Sigma - Moving Range - Excel

July 9, 2015, 12:46 pm
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Is there a way to calculate sigma using moving range in excel?
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[AMOS] - Age in categories - latent or manifest?

July 11, 2015, 3:29 am
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Hi @all!

my name is Anni and I am new in this forum :wave:

I have collected data at a company and because of data protection I could just ask for the age in categories such as "under 20 years", "21-30 years", "31-40 years". In my model the age is a pretty important variable since it is supposed to determine three other latent variables.

My problem now is that I am unsure how to model the variable "age" :shakehead
On one side it could be seen as a latent variable with an disturbance term measured by one manifest variable, since the kategories lead to some kind of error or inaccuracy. On the other side I age yould be modeled as manifest variable with or without a disturbance term. My point is that I am not sure wheather measing in categories produces an error which is modeled in the SEM or not?

Moreover, if "Age" is modeled as a manifest variable it belongs to the measurement model but since my hypotheses include "age" doesn't it also belong to the structural model?

I you can understand what i mean and can help me. Looking forward to hear from you!
Thank you in advance!

Best wishes
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[SOLVED] "index out of range" error ethnograph

July 14, 2015, 7:30 am
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I doubt anyone uses this software, but if they do does anyone know what causes this error? I am trying to do code counts (something I have done many times before) and I get this error.
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[Primer-E] Doubts on Global test vs. Pairwise test for ANOSIM analyses

July 16, 2015, 8:33 am
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Hello,
If anyone could help me with my doubt I would appreciate it.

I'll describe briefly my work.
The objective of this work is to study the fungal community in different grape varieties (5 different grape varieties) and in different types of pruning (2 different types of pruning).

I've done a Two-way ANOSIM test with Primer-E software with factor A belonging to the grape variety and factor B belonging to the type of pruning.

Here are the results:

Tests for differences between Grape Variety GROUPS (across all Pruning groups)
Global Test
Sample statistic (Global R): 0,325
Significance level of sample statistic: 3,4%
Number of permutations: 999 (Random sample from 893025)
Number of permuted statistics greater than or equal to Global R: 33

We consider two things statistically different when p<5%
In this case we obtained a p-value of 3,4%, which means that the grape variety contributed to differences in the fungal community. In order to see which(s) one(s), the program did Pairwise Tests and here are the results:



As you can see, all of the pairwise tests for the grape variety are not statistically significant (p>5%).

And here are the results for the Factor B:
Tests for differences between Pruning GROUPS (across all Grape Variety groups)
Global Test
Sample statistic (Global R): -0,05
Significance level of sample statistic: 61,7%
Number of permutations: 243 (All possible permutations)
Number of permuted statistics greater than or equal to Global R: 150


So my doubt is, if the global test for grape variety were statistically different, shouldn't I expect to see a significant value for some grape varieties at the pairwise test?

Is there any explanation for this?
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AMOS handling missing data from follow up study (where survey not completed)

July 16, 2015, 5:10 pm
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I am conducting a study which requires participants to complete two questionnaires a month apart. A total of 300 participants completed the initial questionnaire, but only 170 completed the second.

I'm not sure how best to handle this in AMOS. With there being so much missing data I don't want the values to be estimated. I believe that with pairwise deletion, all cases are included in the analysis, but when there is missing data for a variable it excludes the case for that variable only.

Any ideas as to what method would be best in this situation?
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[AMOS] Estimate Missing Values using FIML and export them to SPSS

July 22, 2015, 2:38 am
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Hi!

I have a dataset with 1000 cases und 100 variables.
In 200 cases the last 20 variables are missing.
I want to use AMOS to do a FIML estimate of the missing data and export the datasheet to SPSS for further analysis.

I added every observed variable to the model in AMOS, but I didn't add any paths or covariances. I activated "Estimate means and intercepts" and choosed "Maximum likelihood".
The only way to export the data seemed to be "Amos Data Imputation" und "Stochastic regression imputation. AMOS created a single file with 10,000 cases (10 complete Datasets).

Is this the right way to do a FIML estimate of the missing data?
How do I handle the resulting file in SPSS - the number of cases has been changend!
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confidence intervals for correlations on AMOS or SPSS

July 22, 2015, 10:16 am
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Hello,
I was wondering how to calculate confidence intervals for a correlation coefficient on Amos or SPSS. I've been trying to do it on SPSS by standardizing my data, but i've been told the estimate is not fully accurate. When i try to do it on Amos, i get the correlation coefficient but no interval confidence. Maybe I've been doind it woring the whole time? I need help!!!!
Thank you very much!!
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Revman help

September 25, 2015, 10:04 pm
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Hi,

My stat knowledge is not great at the best of times so I'm hoping someone can help me.

I'm doing a systematic review where I'm comparing the effects of group based exercise to individual based exercise in Parkinson's disease. As not specific RCT's have been published on the topic. I have articles that compare individual based exercise to usual care and group based exercise and usual care. Is it possible on Revman to compare these two interventions?

Also, when entering data do I put in baseline or follow up data? Or do I do mean difference?

Thanks
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Announcement : Data Explorer

September 26, 2015, 12:38 am
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Hello,

You may be interested in the release of a new data explorer software aimed at statistical analyses and data mining operations ( more than 25 different analyses). All the functions are executed in a very easy way by dragging objects with the mouse. Description and demo movie can be found here

Best regards

j.f. bouzereau
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Excel Formating Help

February 2, 2016, 6:25 pm
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Hello!

How can i format a table in Excel so, if one of the cells in the table is a text, it is counted as a certain value in another SUM cell

For example :
A B C D E F
1 8 *text* 6 9 3 SUM1
2 *text* 3 4 *text* 2 SUM2

I want to sum the whole line but the B1, A2, D2 should represent a certain value i want. The text would be random in the table. Basically i just want the sum to read that text as a default value. Sorry for not being more clear. Thank you for your patience

UPDATE - So I thought I could either format the whole table so "specific text" is read as "specific value" in any formula, or make the sum formula count the "specific text" cells and add ("times text appears")x("specific value") to the actual sum but i don't know if that is possible or if it is, how to do it. I.E SUM2=SUM(A2:F2)+(Count Text)*(Specific Value)
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How to report the results of a complex path analysis in AMOS?

February 4, 2016, 7:05 am
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So, I started with a model with 5 IVs and 7 DVs. This model had a poor fit (RMSEA = 0.405, CFI=0.760 or so). Most of my hypotheses were not confirmed, i.e. many regression coefficients were not significant, so there were no relationships between many variables.

Next, I started to prune the model, eliminating the paths with non-significant coefficients, and remove two variables that seemed useless (one IV and one DV). Finally, the re-specified model was good (RMSEA = 0.042, CFI=0.982). Also, all the coefficients were significant.

My question is: how to report the results in my paper? Should I present both models and say "model 1 was not good so I modified it to model 2"? Or should I report only the second model and say something like "out of my hypotheses, only this and this are supported"? What are the standards and the common practices in the scientific world? Any suggestion would help.

(N.B. I am aware that I have used SEM in an exploratory manner, though it is a confirmatory technique, but I had to do that. I had a hard time collecting the data and I simply couldn't settle for the initial poor model.)

Thank you!
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[SOLVED] Systat13 / Unable to open file in Commandspace

February 9, 2016, 4:06 pm
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Hello guys,

I have a set of data in an Excel file (97-2003 version). When I open it with Systat13, the data appears in the Viewspace, as Untitled. Then I save it as a ‘***x.sys’ file.
But then when I go to the Commandspace to write commands to try and analyse the data, the output editor in the Viewspace says: ‘ERROR Unable to open file "***x.syz". Please enter another file name.’
Do you have any idea of what I can do to solve that?

Thanks!!
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Systat13 / Problem with plot of Residuals vs Predicted values - repeated measureANOVA

February 11, 2016, 6:38 pm
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Hi there,

I’m trying to do 2 analysis from one set of data.

- 1st analysis: repeated measure ANOVA with 1 grouping factor (TRAIT$) and 1 within factor (TIME).
a/ I used the ANOVA procedure. To check the conditions of normality and variance equality for the ANOVA: can I use ‘only’ the plot of Residuals vs Predicted values (visual check), or do I have to do specific tests to check normality and variance equality? If yes, how?
b/ The results of the Multivariate Repeated Measures Analysis don’t appear in the Output. Any idea why?

- 2nd analysis: repeated measure ANOVA with 2 grouping factors (TRAIT$ and BLOC$, with BLOC$ nested in TRAIT$) and 1 within factor (TIME).

a/ I couldn’t use the ANOVA procedure, because it doesn’t allow to define nested factors. So I used the GLM procedure. But in the Output, I don’t get any plot of Residuals vs Predicted values for residuals. Although I save the residual file, when I ask ‘USE RESIDUALFILE / PLOT RESIDUAL * ESTIMATE’ it doesn’t work (I guess it’s because I need to plot 10 X 10 graphs, but no idea how to do that). How can I solve that?

Any advice would be great! Thanks
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Hi all ..First "Basic" question

February 17, 2016, 5:02 am
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Hello all

I'd like to introduce myself to you via this post here please read
http://www.talkstats.com/showthread....157#post185157

You'll understand where i'm coming from with it.

We have three "identical" punches in the shop working side by side.

Over a 2 week period , punch 1 has snapped 130 widgets.
Punch 2 has snapped 90 widgets.
Punch 3 has snapped 65 widgets.
How should i work this through using Minitab to show that there is significant difference in the three.And when fixed fow to show significant improvement
Thanks all
John
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[amos] Paths non-significant, but good model fit?

February 26, 2016, 2:49 am
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I never had this problem. I have a model that checks out all good from chi to RMSEA. However, all my path loadings are small and way non-significant. What? Has anyone eve had this? If so, how do you interpret this?
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Sigmaplot - two sided horizontal bar chart

March 4, 2016, 8:51 am
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Hello!

I've recently downloaded Sigmaplot 13 in order to easily make graphs etc. for my master thesis. However, there's one thing i struggle to do.

I've captured butterflies in two forest types, and now I want to make a horizontal bar chart with the y-axis in the middle and the x-axis starting at 0 and ending at approx. 150 on each side - the two sides representing the two forest types.

Does anyone know how to do this?

Here's a picture of what i want to do!
http://imgur.com/gRQLCgo
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AMOS - "an invalid wide character string was encountered"

March 10, 2016, 2:24 pm
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Estimates cannot be calculated and I get "an invalid wide character string was encountered" box. What is the cause and solution to this problem?

Thanks
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