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

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5 views

mixed design and simple main effect analysis in SPSS

Hope someone can help me. I have a within subject variable (Question, with 11 conditions) and a between subject variable (stimulation, with 3 conditions). I did an ANOVA and I obtained a main effect ...
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15 views

values in the grouping variable equal “..” ! [on hold]

When I perform a normality test for my variables using the grouping variable named "Group", I got a warning message telling me that there are values in the grouping variable named "Group" equal ".." ...
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29 views

Identifying multivariate outliers in a large sample with missing data, using SPSS

I'm a psychology PhD student doing analysis on a relatively large set of data, obtained via online surveys. The purpose of the study is largely to determine normative data for a population of adults, ...
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19 views

Conjoint Analysis Problem: The File Does Not Exist [on hold]

I want to ask, why every time I run Syntax data from SPSS, the output does not emerge as wanted? System warning says that my PLAN DATA does not exist, in fact I am very sure that the data does ...
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20 views

Correlation? Factors affecting academic performance of students based on their gpa? [on hold]

My friend's thesis. just helping her with the data analysis "FACTORS AFFECTING ACADEMIC PERFORMANCE OF STUDENTS BASED ON THEIR GPA" Divided it into: Internal Factors: Class Schedule & parental ...
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14 views

how to update variable value label and data simultaneously in SPSS. [on hold]

I exported data from surveymonkey(an online survey creation/data collection tool) in SPSS format. now there is an ordinal variable. i need to label its value in opposite order, but when i do, the ...
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19 views

How to calculate correlation between two independent sets of ordinal variables from an online survey through SPSS

I have a survey conducted. Each responded has answered two sets of ordinal questions. Positive answers in one set would normally be reflected as positive answers to other set. I need to find the ...
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19 views

Getting the 1 and 3 years overall and progression-free survival (OS&PFS) and their p values in SPSS

I have a cohort of 300 subject divided into two groups (e.g. chemo y/n). The Median follow-up is 18 months (range 1-87). There were 45 deaths so median survival was not reached. I have compared ...
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1answer
9 views

Time dependent covariate SPSS

I am attempting a time dependent covariate analysis using SPSS but end up running into some difficulties. This is the first time I am trying it using SPSS so would appreciate some advise or direction. ...
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19 views

Do I need to transform object scores of principal components obtained from CATPCA before regressing?

As part of my internship I have obtained a dataset containing 11 categorical explanatory variables and a number of categorical response variables. Using CATPCA i have reduced my explanatory variables ...
2
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1answer
35 views

Weighted cases in a cluster analysis for cases in SPSS

I am conducting a cluster analysis (of cases) for a database which has weight attributed to the individual cases to ensure that it mirrors the general population in terms of sociodemographic ...
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1answer
52 views

optimal binning in R

SPSS has an optimal binning function that helps categorizing into meaningful intervals continuous predictors when a binary response variable exists. I was looking for an equivalent function in R but ...
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34 views

Is my sample suitable for elastic net? What are the assumptions?

I was hoping to use multiple regression to identify significant predictors but I have a tiny sample size (group 1 n=9, group 2 n=37) so I'll be unable to do this. I have read that regularisation ...
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1answer
16 views

Need help with deciding on statistical test for three separate instruments

So I am trying to analyze my data. I used the following scales: Brief RCOPE, the Brief Multidimensional Measure of Religiousness/Spirituality (BMMRS), and the Satisfaction with Life scale (SWLS). They ...
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1answer
16 views

SPSS Correlation between a nominal (IV) and a metrical (DV) variable

I read a few posts about the issue but didn't get a definite solution - maybe you can help. I got a nominal variable (different topics of coversation, coded as topic0=0 etc.) and a number of metrical ...
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17 views

SPSS Bootstrapping Medians - Two Groups Over Time

I am evaluating the effects of two different teaching methods for chest compressions during CPR over time. I have four sets of data: a control and study group compressions per minute on the first day ...
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1answer
41 views

How to test for differences among 3 treatments pre & post, all within subjects?

I want to compare the changes in blood pressure occurring following 2 anesthetic drugs. So in a crossover design, each participant comes for 3 sessions and gets either of placebo, drug A or drug B on ...
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37 views

Bootstrap robust regression

I'd like to do a robust hierarchical regression using bootstrapping because regression diagnostics indicate that assumptions of ordinary regression have been violated. I've made a start using the ...
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38 views

How to perform a regression on principal components obtained from CATPCA in SPSS

As part of my internship I have obtained a dataset containing 11 categorical explanatory variables and a number of categorical response variables. Using CATPCA i have reduced my explanatory variables ...
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1answer
55 views

How to interpret the output of Cox regression with categorical nominal variables in SPSS?

When I enter a nominal categorical variable as independent variable into the Cox regression procedure, SPSS gives cloaked results. It just reports something like the following: ...
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1answer
48 views

CHAID decision tree - Binning continuous variables

I am running a CHAID classification tree on SPSS to classify my data set. I have a couple independent variables including categorical and continuous ones. For continuous variables, I've noticed that ...
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25 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
20 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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22 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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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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26 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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36 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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31 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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2answers
46 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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31 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
21 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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19 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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13 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
88 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
95 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
43 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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17 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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3answers
29 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
24 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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17 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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13 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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30 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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21 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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47 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
67 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
68 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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26 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 ...