Tagged Questions

2
votes
2answers
99 views

Choice between Type-I, Type-II, or Type-III ANOVA

We have a dataset with three variables (dV: self-reported measure on scale 1-5, assumed to be metric; iV1: factor with 4 levels; iV2: factor with 8 levels). We are interested whether the dV differs in ...
0
votes
0answers
14 views

Reduce Sample Size (Categorise??) [duplicate]

I have been looking for an answer to my question but havn't been able to find any literature documentation or help in regards. I have a large dataset which I need to further analyse. Because of this I ...
4
votes
2answers
143 views

R p-value half to SPSS rANOVA

I have done rANOVA in SPSS and then in R and got two different p-values from the same model. While SPSS gives 0.032, R gives 0.0162, which when rounded is a half. Other data are exactly the same. 1. ...
1
vote
1answer
569 views

How to analyze Max Diff via R or SPSS

I am interested in utilizing Maximum Difference Scaling (Max Diff) for a survey, but apart from the Sawtooth software, I was not able to find a good answer on how to best analyze Max Diff. What is the ...
0
votes
1answer
123 views

Dealing with multicollinearity by separating common variance

On this page, I read about multiple ways to deal with multicollinearity. I determined that the last method suggested may be best for my purposes. I copied it below: Treat the common variance as a ...
0
votes
0answers
174 views

Why are these hierarchical linear regression results in R and SPSS different?

When I try to use the data and example for HLR from this example dataset taken from this post in the R Tutorial Series on hierarchical linear regression the results don't match when I try to use the ...
1
vote
0answers
188 views

Effect sizes from LMM

My question is, how to get effect sizes for a linear mixed model? I am using the following model in SPSS: ...
2
votes
1answer
210 views

Does SPSS rescale dendrograms?

A colleague and I have been clustering some data in SPSS (v19) and R (2.15), respectively. Using the same distance metric and agglomeration method, we get identical merge orders/agglomeration ...
4
votes
1answer
205 views

Different ANCOVA results in R using different functions

before my actual ANCOVA I would like to test whether there is a significant interaction between the IV and the CV as this is one assumption for ANCOVA. I found 3 different ways in R to perform an ...
2
votes
1answer
449 views

Testing anova hypothesis with contrasts in R and SPSS

Using data and answers from this question I was trying to test the hypothesis $H_0:-3\mu_1-\mu_2+\mu_3+3\mu_4=0$ ...
2
votes
0answers
556 views

R vs. SPSS Kolmogorov-Smirnov test

I was recently given the following data. 7 1 6 6 2 8 3 7 4 6 3 3 1 8 4 5 9 3 2 4 1 4 4 3 6 3 4 2 3 2 7 2 7 4 2 4 4 4 3 2 2 4 5 8 6 4 3 1 5 5 I then ran a KS test ...
0
votes
1answer
140 views

Comparing means - 2 repeated measures variables, controlling for covariate with heterogeneous slope

I have a 2 level repeated measures DV of accuracy, and a covariate of response bias. As response bias increases, accuracy level 1 increases while level 2 decreases. I want to see if there is a ...
2
votes
0answers
220 views

Split-split-split plot cross-over design… is this even possible?

I'm doing statistical analysis on a psychology study I ran a short while ago, and I'm starting to think that I've designed myself into a corner. In the study, we measured participants' pointing ...
3
votes
0answers
377 views

How do I estimate a repeated measures ANCOVA in R and SPSS?

I'm currently running a perception experiment: DV: error (this in degrees- how much an observer was away from the real answer) IV: the time bin (5 levels) in which the unique stimulus appeared ...
0
votes
0answers
90 views

Problem with classifying new observations with discriminant analysis

I have a data set of 40,000 individuals which I clustered using k-means. I used 30 variables, each ordinal from 1=minimum to ...
11
votes
4answers
3k views

Visualizing Likert responses using R or SPSS

I have 82 respondents in 2 groups (43 in Group A and 39 in Group B) that completed a survey of 65 Likert questions each ranging from 1 – 5 (strongly agree - strongly disagree). I therefore have a ...
11
votes
2answers
1k views

Interpreting discrepancies between R and SPSS with exploratory factor analysis

I am a graduate student in computer science. I have been doing some exploratory factor analysis for a research project. My colleagues (who are leading the project) use SPSS, while I prefer to use R. ...
0
votes
1answer
252 views

Multilevel model with an ordinal outcome

I have a data set from a survey of health problems and annoyance by traffic noise in people living in residential buildings, with "5-point scale answer" questions. I want to perform a multilevel model ...
3
votes
2answers
519 views

Different F-ratios for within subjects effects when using SPSS and R's aov

I've just compared the ANOVA tables generated by SPSS and Statistica with the aov table provided by summary(aov.model). They yield identical between Subject effects (e.g., NativeLanguage(English vs ...
14
votes
11answers
1k views

Best way to get started with and learn R

I have tried several times to "go it on my own" - but with limited success. I am a casual SPSS user and some SAS experience. Would appreciate a pointer or two from someone who has similar background ...
3
votes
2answers
523 views

Is SPSS giving the wrong residuals for a repeated measures design?

When running a repeated measures ANOVA in SPSS, it's possible to 'Save' the residuals as new variables in the data editor. But the values output do not match the residuals given in R, and seem to be ...
0
votes
0answers
159 views

Emulating SPSS functions/statements in R [closed]

I'm so used to SPSS that when I program in R I "miss" some of SPSS's features. So the idea here is to create a thread where people can contribute their R versions of SPSS functions or statements. ...
3
votes
1answer
719 views

“Object not found” error in gls

As the R very beginner I'd like to ask if anyone could help me with the following problem? ...
1
vote
3answers
850 views

Simple and multiple logistic regression

I have almost two questions. I need a single covariate logistic regression (LR) for each of my variables. Should I do it manually in SPSS, selecting each variable and do logistic regression? Is there ...
4
votes
2answers
2k views

Checking factor / covariate independence in ANCOVA

One of the ANCOVA assumptions, as I read it here, says that: Independent variables orthogonal to covariates. In traditional ANCOVA, the independents area assumed to be orthogonal to the factors. If ...
3
votes
2answers
2k views

Logistic Regression: Classification Tables a la SPSS in R

In SPSS output there is a pretty little classification table available when you perform a logistic regression, is the same possible with R? If so, how?
6
votes
5answers
2k views

Better Classification of default in logistic regression

Full Disclosure: This is homework. I've included a link to the dataset ( http://www.bertelsen.ca/R/logistic-regression.sav ) My goal is to maximize the prediction of loan defaulters in this data set. ...
1
vote
3answers
370 views

Using R's formula style lm() with SPSS

Is there a way to type in a regression formula in SPSS in the same manner as R, with weights? For example, in R, I would write something like: ...
1
vote
2answers
446 views

How to understand optimal Scaling in R: The Package homals for novices

Does anyone know of a step-by-step guide for the practical implementation of Gifi Methods for Optimal Scaling in R: The Package homals? Although I have an OK theoretical understanding (thanks chl for ...
6
votes
2answers
380 views

Hypothesis testing that one time-series of a measure of entropy doesn't belong to a population

Disclaimer: I'm a software engineer, not a statistician, so please forgive any blunt error :-) I have a set of time-series "curves", each measuring the entropy of a given artifact. Now, I'm standing ...
126
votes
20answers
35k views

Python as a statistics workbench

Lots of people use a main tool like Excel or another spreadsheet, SPSS, STATA, or R for their statistics needs. They might turn to some specific package for very special needs, but a lot of things can ...
2
votes
2answers
394 views

Column Means Significance Tests in R

New to the site. I am just getting started with R, and want to replicate a feature that is available in SPSS. Simply, I build a "Custom Table" in SPSS with a single categorical variable in the ...
7
votes
4answers
2k views

is psych::principal function still PCA when using rotation?

I have tried to reproduce some research (using PCA) from SPSS in R. In my experience, principal() function from package psych ...