SPSS (Statistical Package for the Social Sciences) is a proprietary cross-platform general-purpose statistical software package.

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2 views

Check homogeneity of variance for linear mixed model in spss

I ran a linear mixed model (LMM) for my nested data and would like to check for the homogeneity of variance assumption. As there is no a button for checking the homogeneity of variance at the LMM ...
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1answer
11 views

Wilcoxon Rank Test or T-Test? [duplicate]

What data analysis is better? or fit for my data? I've used Likert scale for my questionnaire (1-5) and I have 387 respondents. Wilcoxon Rank Test or T-Test?
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13 views

Running K-mean after PCA SPSS [on hold]

Is there a script that computes factor scores using the component score coefficient matrix (SPSS PCA output), that can then be used as the basis for K-means clustering? As an alternative is there a ...
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7 views

Relative weights in regression analysis in SPSS: Matrix-approach vs. factor and regression

I am trying to perfome a relative weight analysis as described by Johnson (2000). I have 13 predictors to a more general indicator. Initially, I started by: running a principal component analysis ...
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11 views

SPSS question: Calculating a variance within one record [on hold]

How can I compute a variance for several scale scores, within people? Say I have 100 people and they have scores on 5 variables, say math, verbal, mechanical, reasoning, and memory. I would like to ...
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9 views

Is it possible to create the data object in Python for SPSS [migrated]

I have a python script that is reading in an XML file into an array (in a CSV format I created). I'd like to be able to use that data directly instead of saving to a file. Is this possible? So it ...
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0answers
20 views

What are F values of the canonical functions in discriminant analysis?

Recently, I read a paper (Pell et al. 2009) in which the authors use Discriminant Analysis, and I quote: The discriminant analysis produced three significant canonical functions (Function 1, ...
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31 views

How can I calculate power in SPSS

I have 4 different groups and i want to look if the means significant differ from each other but before that i want to know if the power in every group is high enough. How can i calculate the power ...
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28 views

Data structure for Inverse Cumulative Distribution when columns are *NOT* separate variables

I am trying to structure data to conduct a Frequency analysis and output an Inverse Cumulative Distribution histogram for a biomechanics study. The goal is to compare 4 devices with respect to their ...
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1answer
36 views

Help with regression

I have a dichotomous variable, "know" and "not know". This refers to a participant knowing the meaning of a word or not. Then I have another variable as "fixation duration" which is continuous. I ...
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29 views

SPSS Backward Regression, wrong results?

I'm using SPSS to do very simple multiple linear regression models. Playing with these models I noticed I get different results if I either use the Enter method or the Backward selection. Let's say I ...
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1answer
18 views

post-hoc for non homogeneous data

Which post-hoc test is used for non homogeneous data. I have checked my data set and they are normally distributes. I used Anova with Levene's test and it showed that my data is not homogeneous, and ...
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16 views

Two-step cluster analysis and autoclustering statistics

In older versions of SPSS there was displayed an auto-clustering statistics table with e.g. BIC criterion and its change for various cluster solutions. In later versions of SPSS (e.g. 21) I do not see ...
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12 views

how to offer recommendation? comparison of satisfaction between two groups?

My research is "level of satisfaction in relation to customer service: comparative study between 2 fast foods my questionnaire consists of 19 questions. I'm using SERVERF, the 5 dimensions. 8 ...
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2answers
74 views

data analysis, dissertation of thesis? help please?

I'm having a problem with my dissertation. My research is "level of satisfaction in relation to customer service: comparative study between 2 fast foods my questionnaire consists of 19 questions. ...
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1answer
41 views

Hierarchical or Two-step cluster analysis for binary data?

(This question is an edited version of a question I previously posted which one user recommended would benefit from more focus). I have 2000 questionnaires from respondents which ask 33 different ...
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1answer
35 views

Effectsize difference between Mann-Whitney U and t-Test

I have data that is officially not normally distributed (Kolmogorov-Smirnov test < .000 BUT N=around 1200 so K-S not really reliable). In plot I can see that form looks good but negatively skewed. ...
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16 views

Cluster analysis of binary data [duplicate]

I have 2000 questionnaires from respondents which ask 33 different questions about which issues are present in their lives - i.e. alcohol abuse, domestic violence, mental health, child abuse, learning ...
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4 views

Converting Line Graphs into Column Graphs for Estimated Marginal Means (SPSS) [migrated]

Although converting line graphs into column graphs is quite straightforward in the case of building charts for frequencies/ descriptives, it does get a bit confusing when trying to make such ...
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2answers
18 views

SPSS - How do I analyse two categorical non-dichotomous variables?

I'm having some issues running an analysis with two categorical variables that are both non-dichotomous... Some background information on my study: My study focuses on how young adults sexually ...
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1answer
21 views

Compare group mean to larger group of which it is part

I have thousands of evaluation scores, over several sites, which vary in number of evaluations for each. I am tasked with comparing the evaluation means for each site to the all-site mean. The ...
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16 views

column proportions comparisons for one variable

I have a one variable with three categories like marriage/divorced/widowed. The counts are: 40, 23, 7. I use SPSS in this case. I know how to perform chi_squared test for this, and it shows that the ...
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8 views

ICC to assess independence of observations in a cluster randomized trial

How can I compute an ICC to assess independence of observation assumption using SPSS for ANOVA. The data on two DVs were collected from participants one time over 28 weeks in 28 clusters (so this is ...
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25 views

Predicting one daily variable from another in SPSS

Note: There are similar questions to this one, but they don't seem to get at quite what I'm trying to figure out. I have a week's worth of daily data with a number of variables, including nighttime ...
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16 views

How to do planned comparisons on repeated measures (GLM repeated measures) using SPSS?

I have issues figuring out how to perform planned comparisons using a GLM for repeated measures analysis. More specifically, I have one group of subjects, assessed with 2 different scales (3 subscores ...
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6 views

Bootstrapping with random effects in SPSS

I'd like to use bootstrapping in my two-way ANOVA containing two fixed and one random factor. Why is the bootstrapping method not available (greyed out) for models containing a random factor? Thanks! ...
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45 views

What is a “discriminant function” and how to interpret it?

I want to test a model using discriminant function analysis. My question, as the title states, is very basic: What is a discriminant function? That is, how can I interpret the different discriminant ...
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1answer
65 views

Under-forecasting in Regression

I have to do forecasting of sales that is how much sales of a product is going to happen in a particular store. I have time series data for last two years and doing forecasting for 2014. The variables ...
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1answer
54 views

Is there an R equivalent for the SPSS custom Tables feature?

I have used the custom tables feature in SPSS for my job almost every day. I am trying to learn R . How can I recreate the custom tables functionality in R. Is there some specific package that I need ...
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31 views

How to compare two variables with different distributions?

I want to compare 2 independent variables, but the problem is that the first variable is normally distributed, while the second variable is not. What is the appropriate test in this case? Can I use an ...
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25 views

which test should be used to detect the effect of one variable on another?

I have conducted a research on four independent groups of students; one experimental and one control group at two levels. The design of the study was like a pre-test and post-test. I want to detect ...
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2answers
26 views

Correlations for nominal data

I have a gender variable in my questionnaire, I have done it where 1= Male and 2= Female. I would like to correlate this variable with their answers to compare the difference between male opinions ...
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2answers
300 views

SPSS and Stata output different

I'm Stata-proficient but learning SPSS for my new position. I am using a simple dataset to do very basic regressions and comparing to see if the results are the same. They're not. I'm close, but the ...
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27 views

GEE in SPSS: the case of ever-decreasing QICc values

I've been using GEEs in SPSS 22 to analyze my dissertation data and have discovered an interesting problem: when trying to figure out which subset of model factors have the lowest QICc, and therefore ...
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1answer
72 views

Mixed model in SPSS with random effect and repeated measures

I am working on analyzing a dataset that involves repeated measures data. The data was previously analyzed by a colleague using custom code written in C++, but I have expanded the dataset and am ...
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2answers
57 views

Correlation and collinearity in regression

I did a correlation analysis for my variables. All of them are associated (the coefficient is above 0). However, there is no collinearity problem in my regression analysis. I do not know how to ...
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7 views

Estimation of change and difference in changes for repeated measurements

In an ongoing project concerning life style changes, I can't find the way to study the difference in effects over time between the intervention and the control group. The project is set up as a an ...
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1answer
33 views

SPSS: Comparing Regression Coefficient for 2 Models

Hope you guys could help me with a question I've been stuck on for a while. I'm currently writing my thesis on how MRT (the railway system in Singapore) accessibility affects prices of public ...
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1answer
55 views

How to Calculate silhouette coefficient in SPSS for clustered data set?

I am having a pre clustered dataset with data and the action cluster identified for it using a custom clustering method. I am looking to calculate silhouette coefficient on this clustered dataset ...
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6 views

Repeated measurement model for Dichotomous variable in spss?

I have a repeated data in 7 diffrent time and 4 group. my variable is Dichotomous (yes/no). How I can do it with spss? what non-parametric test could I use? I appreciate your answers Leili
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2answers
30 views

Missing values in SPSS for Chi-Square Tests

I'm a postgraduate student, doing a accent perception study, this is my first time using SPSS! I'm conducting the above tests on my data, where my participants used Likert scales to analyse the ...
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7 views

Missing values on clinical scoring system in SPSS

I have a SPSS database with 747 patients with sickness symptoms and lab results as variables. With those symptoms and results I have generate two scoring systems. I sum the scores of all the variables ...
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1answer
19 views

What can I do to if I have a nominal dependent variable and scale independent variables?

Our dependent variable is a nominal variable that asks respondents "would you share this video?" with the responses being either yes or no. The hypotheses we are testing are all relational directional ...
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1answer
46 views

Mahalanobis distance in a hierarchical cluster analysis in SPSS

I am conducting a hierarchical cluster analysis in SPSS on my database with several neuropsychological and psychiatric variables. In my database, some of my variables (that is: two pairs of variables) ...
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2answers
47 views

correlation between factors

I am new to statistics and SPSS. I have a questionerre having 30 likert scaled questions, and 5 factors each having 5 or 6 questions. I made the reliability analysis and no problem is found. all ...
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16 views

Sample size for Cluster sample

I'veen asked to claculate a necessary sample size and I tought the best way to reduce costs and time is using cluster samplig protocol but I have few information and I don't have much experience with ...
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33 views

3 way mixed ANOVA & pairwise comparisons effect size

im in desperate need of some help for my data analysis assignment! I have a 3 way mixed anova- where I have 2 sig main effects, one significant two way interaction and the sig three way ...
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13 views

some suggestions for analyzing two-factor within subject design?

I'm doing a two-factor within-subject design experiment, and the two factors are all categorical variables. factor one has four categories, while factor two has two categories, and is counterbalanced. ...
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17 views

Error messages when doing regression in SPSS

I need to do a number of regressions in SPSS but keep getting error messages. For example - "There are X cells (i.e., dependent variable levels by combinations of predictor variable values) with ...
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10 views

Count variable as control variable in regression in SPSS

I'm doing a research on development of audit fees in 2005-2012. I'd like to see if there's a downward or upward trend in them. I have made a count variable of the years (2005=1 2012=8) and now should ...