All Questions
3,928 questions
13
votes
5
answers
5k
views
Stepwise logistic regression and sampling
I am fitting a stepwise logistic regression on a set of data in SPSS. In the procedure, I am fitting my model to a random subset that is approx. 60% of the total sample, which is about 330 cases.
...
- 1,344
2
votes
1
answer
7k
views
How to do meta-regression analysis with SPSS?
I have done a meta analysis and heterogeneity is too high. I am working with (even/Total) for experimental and control groups to calculate the Odds Ratio. I have done fixed-effect and random-effect ...
Nikki
5
votes
1
answer
3k
views
Multi-stage selection model with panel data in R
My data consists of individual level observations nested within countries over time. I would like to use multilevel models along with some sort of selection model.
I have three related questions.
...
- 285
10
votes
4
answers
9k
views
How to test random effects in a multilevel model in R
I have been reading a good book called Applied Longitudinal Data Analysis: Modeling Change and Event Occurrence by Judith Singer and John Willet. The book shows that by modeling in 2 levels, we can ...
- 517
7
votes
2
answers
7k
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?
- 7,362
13
votes
5
answers
8k
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. ...
- 7,362
2
votes
1
answer
9k
views
F-test for Lack-of-Fit in SPSS
Some googling revealed that doing the F-test for Lack-of-Fit in SPSS is not so trivial. It seems one has to “trick” SPSS to do that. See for example this. Can anybody suggest a better source of ...
- 6,584
1
vote
2
answers
1k
views
How do I get non-parametric test values (not just p) in PASW 18?
from what I can tell, PASW v.18 (the new version of SPSS) only gives you the p value of nonparametric tests. I am calculating Kruskal Wallis and Mann Whitney tests, and need to report the test ...
- 307
4
votes
2
answers
13k
views
When to interpret multivariate tests when performing repeated-measures ANCOVA?
Yesterday, I ran a repeated-measures ANCOVA. The purpose was to determine the usability of two computer systems, call them 1 and 2. Each subject completed three (conceptually different) tasks, call ...
- 4,027
41
votes
3
answers
10k
views
What's the relation between hierarchical models, neural networks, graphical models, bayesian networks?
They all seem to represent random variables by the nodes and (in)dependence via the (possibly directed) edges. I'm esp interested in a bayesian's point-of-view.
- 812
1
vote
3
answers
598
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:
...
- 7,362
2
votes
3
answers
3k
views
In SPSS, is there any way to define a use groups of data based on combinations of variables?
I have a data file in which each participant is tested many times in several blocks. The data is formatted so that each trial contains a participant id, a block number and a score. What I want to do ...
- 2,171
6
votes
2
answers
21k
views
Binary or Multinomial Logistic Regression?
I wish to analyze the following :
Predictor Variable (IV): Satisfaction of sexual needs as important (4 items scale and respond based on 4 point likert scale. Sum up to get the item score.)
Response ...
Mengzhen Lim
6
votes
1
answer
12k
views
Inter-rater reliability using Intra-class correlation with ratings for multiple objects on multiple properties
Initial Question:
I am trying to calculate inter-rater reliability. Previous researchers in this area have used intraclass correlation. SPSS has options for two-way random, mixed random and one-way ...
- 307
3
votes
2
answers
2k
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 ...
- 71
5
votes
3
answers
925
views
"Multiple response" analysis of arrest records
Background:
I'm a junior researcher at an institute dealing with regional issues, particularly involving drug policy. Almost two years ago, one of our senior researchers began collecting arrest data ...
15
votes
3
answers
155k
views
How to deal with non-binary categorical variables in logistic regression (SPSS)
I have to do binary logistic regression with a lot of independent variables. Most of them are binary, but a few of the categorical variables have more than two levels.
What is the best way to deal ...
- 1,100
5
votes
4
answers
552
views
Are these equivalent representations of the same hierarchical Bayesian model?
If $X$ is a categorical variable, and I am interested in the posterior distributions of $\beta_1$, where $\beta_1$ is a vector of coefficients, one for each level of X, are these equivalent models?
...
- 7,270
4
votes
3
answers
278
views
What is a good internet based source of information on Hierarchical Modeling?
I am talking about the regression method that measures the impact of several layers of independent variables upon a dependent variable.
- 7,882
7
votes
2
answers
2k
views
Combining repeated experiments into one dataset
I hope you all won't mind a basic question.
We are examining the effects of a compound at various concentration on the behaviour of an organism. The compound is administered once at the beginning of ...
- 397
3
votes
2
answers
3k
views
How to use Stata to pool Cohen's d? [closed]
I am attempting to calculate Cohen's d and then pool those estimates into a summary effect size. Can anyone help? (Stata or SPSS software owned).
Jay
42
votes
8
answers
26k
views
Under what conditions should one use multilevel/hierarchical analysis?
Under which conditions should someone consider using multilevel/hierarchical analysis as opposed to more basic/traditional analyses (e.g., ANOVA, OLS regression, etc.)? Are there any situations in ...
- 783
8
votes
4
answers
887
views
Learning how to use a new statistical GUI?
The question is in the header, but I would extend the context a bit.
Next semester I am due to be a teaching assistant (TA) in a course in statistics, where I would need to help sociology students ...
8
votes
2
answers
686
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 ...
35
votes
5
answers
91k
views
Fisher's Exact Test in contingency tables larger than 2x2
I was taught to only apply Fisher's Exact Test in contingency tables that were 2x2.
Questions:
Did Fisher himself ever envision this test to be used in tables larger than 2x2 (I am aware of the tale ...
- 5,851
378
votes
26
answers
136k
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 ...
4
votes
2
answers
3k
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 ...
- 1,344
72
votes
8
answers
62k
views
Is PCA followed by a rotation (such as varimax) still PCA?
I have tried to reproduce some research (using PCA) from SPSS in R. In my experience, principal() function from package psych ...
- 3,748