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

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Tree analysis - CHAID

I am running a decision tree analysis, and the same predictor that forms the first core branch, reappears as an another branch further down the tree. Could somebody explain me how this is possible? ...
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38 views

Relative Variable Importance in Clustering

In SPSS, the user can check the relative variable importance in a clustering result and produce a graph like the following: link: ...
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24 views

How to compare 37 dichotomous variables (lab tests) to 31 dichotomous variables (diagnosis)

I've constructed a database based on chart review of patients. Patients had a variety of tests performed (37 different types, which were either positive, negative, or not performed aka 1/0/blank - I ...
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17 views

Is my data normal? [duplicate]

Ive tested my data for normality in SPSS, and i have two sig. numbers from the Kolmogorov-Smirnov and Shaprio-Wilk. In the Kolmogorov-Smirnov test i have the data: 0.014, 0.013, 0.200 and 0.200 In ...
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88 views

How can I compare regression coefficients in the same multiple regression model

I think this question has been answered in bits and pieces here and there, but I am still a bit unsure about what the best approach for this is: how to compare two coefficients from a multiple linear ...
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34 views

5 Likert Scale and Normal Distribution prior to parametric testing

I have data from a 5 point Likert scale item which approximately 1/4 of the responses only account for 1 through 4 of the 1 through 5 available. Do I have to standardize the min/max response ...
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82 views

What do the tests of model effects and parameter estimates really tell (when an interaction is defined)?

A couple of times in LMM or GEE (with SPSS, though I doubt that matters – and might occur in other analyses as well, but these are the ones with which I have seen it) I have seen something that seems ...
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29 views

How to analyse the relationship between many categorical variables

I have a number of categorical variables, each with varying numbers of levels: gender of client (m,f) age group (0-8, etc.) diagnosis (mild, moderate, severe, profound) location (community, ...
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17 views

Need help with proper syntax for SPSS Mixed [closed]

I am having trouble building my model properly, and I was hoping I could get some advice here. I have a 2 (S: P vs. D) x 3 (ET: CA vs. CO vs. AD) between-subjects design. Participants were run in ...
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1answer
25 views

Questionaire analysis and grouping responses

I want to know if the creative process engagement is related to creativity. I don't know how to analyze the questionnaire. I will be collecting data for cpe with Zhang and Bartal's (2010) 11-item ...
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72 views

is it possible to use partitioned data(train&test) together with cross-fold validation?

I have used SPSS Clementine in order to train a classifier, for this I have used a partition node with 2 parts(train and test),then using a c5-tree and cross-fold validation. I did this because I ...
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42 views

Testing “weak” instruments - F test

I would like to address the endogeneity problem in my model. Let me go step by step. I have panel data for 19 countries, 1995-2010. My regression model: ...
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41 views

Best way to estimate a regression with reaction times

I have reactions times in a no-normal distribution, so I am using logarithms. Which can be the best way to estimate a regression? Later, I would like to plot the results according to the age of my ...
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49 views

Does it make sense to plot train and test results on a common ROC graph?

I am building a model using SPSS with 80% of my data. I can plot a ROC curve for both the training set and separately for the test set. I can´t find a way to plot both on the same graph. Since both ...
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34 views

Running standardized/unstandardized regression equation on SPSS

I am working on a regression assignment using SPSS. I have raw, centered, and z scores for the data. I already regressed the DV and IV and see the unstandardized and standardized coefficients under ...
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131 views

Find out if there is a way to create BMI weight category variable

I am working on a project and have to find a way to break my data into percentiles. The variables that I already have are gender, age in months and BMI. If I am able to calculate the percentile that ...
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29 views

Calculate residual after SPSS runs ANOVA

I have a task something like compute residuals in dollars for one observed person (with gender code, a class they're in, their age, and they make let's say 50,000 a year-the Dependent Var). After ...
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2answers
70 views

Relationships between health conditions - Spearman's correlation?

I am examining the relationships between health issues in pigs. I want to know which conditions tend to co-occur. All animals have at least one condition and 5 at most. I have coded each condition in ...
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42 views

SPSS/Stata Repeated Measures - Contrast question

I have data from 8 subjects collected at 5 time points. I would like to see if there is a difference between time points (1 + 2) and (3 + 4 + 5) using either SPSS or Stata. When in SPSS I use ...
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1answer
78 views

Grouping subject data for within-subject analysis in SPSS

I have over 30 subjects who each did the same task about 50 times. Each of these data point can be in condition a1 or a2 of variable A or condition b1, b2, b3 or b4. So for each subject, I have ...
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60 views

Different degrees of freedom when using the same mixed effect model (SPSS)

I have a question regarding mixed effect models. Is it possible that the degrees of freedom differ when I use the same model with different dependent variables? Or does that indicate that something ...
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1answer
28 views

Data formatting for an ANCOVA in SPSS

was wondering if someone could help clarify an ANCOVA for me, or maybe post me in the right direction. I have a set of outcome measures that have been administered pre treatment and post treatment. I ...
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79 views

Binomial logistic regression in SPSS using survey weights

I am running a logistic regression in SPSS with a sample that uses survey weights. The sample size is 1000 and the weights are along the lines of .86 or 1.23 depending on the case. I am using the ...
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96 views

Box and whisker plot or bar plot with mean and SE?

I am trying to present my data in a meaningful way. To do so, I thought it is a good idea to use a box and whisker plot, because, it shows min, max, median and skewness of data. However, due to ...
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1answer
26 views

How to create an “alignment” variable from mutual rating variables

I want to create an "alignment" variable out of two other variables. Meaning, that if two raters (say manager and employee) rate each other similarly, alignment is high, but if they rate each other ...
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26 views

How do I find if a dependent variable is affected by another dependent variable?

I have one experimental group with language disorders (independent variable) and I have administered them 4 tests (dependent variables). The "language" test which comprises of the sum and two subparts ...
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55 views

Generalized Linear Mixed Model

I have three independent variables (all binary) and two interaction variables that I would like to test for their effect on the dependent variable "Awareness_level". This dependent variable is also ...
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3answers
127 views

Are the results of OLS linear regression correct?

How could we know if the coefficients and R-Squared in the following table are reliable and are correctly computed or not? Is there any way to validate the correctness of the results, considering that ...
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101 views

SPSS: Crosstabs multiple comparison

I have a table with 11 columns and 2 rows. Column 1 is the control group and I want to compare all the other columns with it. I'm not interested in compraing columns 2 - 11 with each other and I'm ...
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1answer
36 views

Can I use Mean values of likert resposes instead of factor scores in case of skewed values?

I have five point likert scale responses ((1-most imp, 5-least imp) for 14 items that I want convert them into 5 factors with confirmatory factor analysis. I already have designed which item should go ...
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59 views

Regression with multiple dependent variables and 2 sets of multiple independent variables

In my data I want to be able to determine which set of IVs (there are 8 variables total, 4 in each set) does a better job of predicting a set a DVs (there are 4). I know I could use multivariate ...
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105 views

One way Anova Test validation

Let me give you an example to show what i am trying to. Let's say 50 patients started a cure for a disease and it took 2 months. So, I want to compare the first month's tumor sizes to the second ...
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16 views

Power analysis for log-gamma model

I fitted a generalized linear mixed log-gamma model in SPSS with 1 fixed factor (binary), patient ID as a random intercept and a continuous variable as (fixed) covariate. How can I calculate the ...
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27 views

How to analyse Multiple Imputation data with SPSS?

I have to work on a dataset treated with the Multiple Imputation method to handle missing data. In fact, I have 5 different variant of the same dataset, with missing data replaced by probable values. ...
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250 views

Pre and Post test analysis utilizing a likert scale and SPSS

I will openly admit that statistics and statistical programming is not really in my wheelhouse. That said, my job requires it. I am trying to analyze the data gathered from a pre and post test survey ...
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40 views

Difference between BIRCH and Two-Step Clustering

I don't have SPSS. But judging from the documentation you can find on the internet, SPSS "Two-Step Clustering" seems to be closely related to BIRCH clustering: Zhang, T., Ramakrishnan, R., & ...
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112 views

What data structure to use for my cluster analysis or what cluster analysis to use for my data?

I have a large dataset of categorical variables. The data consists of shoppers who purchased two items during a single trip to a store. There are approximately 75,000 cases and 1,500 different ...
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426 views

Fisher's Exact Test value in SPSS

I have two ordinal variables, and I'm using the Fisher's Exact Test in lieu of the chi-square test when the expected values for the latter test are lower than 5. My contingency tables are $3\times2$. ...
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2answers
89 views

Cluster analysis, what to do with different scales?

I want to identify different groups of respondents out of up to five variables of the European Values Study 2008. At first I took 4 questions for cluster analysis all on a scale from 1 to 10. ...
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2answers
85 views

Weighting variables in two-step cluster analysis

I'm using SPSS to perform two-step cluster analyses. SPSS shows predictor importance of each variable used in an analysis. Oftentimes, a binary variable like gender (sorry, I'm just keeping it ...
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2answers
104 views

Is a repeated measures ANOVA appropriate for multiple within-subject measurements?

I recorded 4 groups of captive birds (each group a difference species) at the same 3 times each day for 15 days. I want to determine if there is a difference in their vocalization properties such as ...
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116 views

Can complex Kruskal-Wallis results be reported in tables for APA-style publication?

Advice? I ran a Kruskal-Wallis H test in SPSS and have a lot of variables to report for a paper for publication in APA format with limited word count. Can I show all the paired comparisons in a ...
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18 views

Correlation between ordinal variable an nominal variable [duplicate]

I want to find correlation between job satisfaction (by likert-type questionare) and sex. Should I use Kruskal-Wallis test to find correlation between two?
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53 views

More specific test to see where it is significant rather then whether it is significant at all? Degree courses against levels of motivation to study

I've been doing chi-square tests to see whether there is a correlation between e.g. motivation levels when studying and degree course. With chi-square, it only reveals whether there is a significant ...
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2answers
127 views

Correlating time series for 20 regions (SPSS)

I have a question to which I can't find an answer although I spent really awfully lot of time searching. I have time series data for about 20 regions of a country. Each time series covers 20 years. ...
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1answer
29 views

Comparing 8 categories (degree) against % who did a gap year within that degree - which test?

Want to see if there is a statistically significant difference between the % of students who did a gap year across 8 different degrees. $$ \begin{array}{l|r} \text{Degree} & \text{Gap } [\%] ...
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252 views

Marketing Mix Modeling for sales data

I have data for 4 years with variables year, month and sales volume only. I want to find the base volume and incremental volume. I want to use Marketing Mix Modeling. Can anybody tell how to define ...
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52 views

Is there any way I can manually set the intercept in SPSS?

As part of my dissertation I am looking into the relationship between temperature and methane emissions. A large proportion of this work relies on statistical interpretation and analysis. When ...
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92 views

What is the correct ANOVA for repeated measures with multiple measurements for each within-subject factor?

In Andy Field's example for one-way ANOVA with repeated measures, he measures "retching time" for eight different celebrities eating four different gross foods. He tests things like sphericity, runs ...
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23 views

Comparing groups with multiple related variables

I have four groups with six subjects in each group. For each subject I have measured their mean blood pressure every minute for 3 hours. This means that I have 180 variables. The first 60 minutes ...