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

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use spss to analyse a cluster randomized data

I have data from a cluster randomized trial, that is, each subject in the same cluster has received the same treatment. Do chi square test and t-test need some adjustments? More precisely, which ...
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11 views

Empty significance in SPSS linear regression

I got a weird result with linear regression: there are empty significances. I use 'Stepwise' method, so it should drop the inadequate variables. (Of course the "000" Betas are confusing too.) What ...
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10 views

How to test for mediation with a continuous mediator and DV, but a categorical predictor?

I want to explore whether attitudes mediate the relationship between employment status and intention to apply to graduate school. (See image below). I planned to use the Sobel Test to explore the ...
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1answer
16 views

Reading a crosstabs

I am confused and struggling to read this simple crosstabs. I am trying to create a profile of downloaders. One of the demographics I am looking at is age. Should I be looking at the percentage ...
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1answer
44 views

Building a time series model using more than independent variables

I am working on a project, and I am totally new to statistics. I have sales data for last two years at week level, along with other variables like temperature, holiday (TRUE/FALSE), where holiday are ...
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11 views

3x2 design - data analysis ANOVA/MANOVA? How to add interaction in the model?

Discription of experiment I am researching "The effect of review valence and brand commitment on consumer's purchase intention" for my university thesis. I conducted a 3x2(no review/positive ...
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3answers
251 views

How can I improve the predictive power of this logistic regression model?

I am using SPSS to analyze a data set which aims to predict whether individuals have cancer based on five symptoms (a, b, c, d, e). In this data set most individuals have cancer. I ran a Binary ...
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1answer
37 views

SPSS linear regression - variables that are percentages

I have some data about music styles played at festivals. It looks like this: Based on this (and other) data, I'd like to make a model to explain the price of a ticket for each festival. However I'm ...
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20 views

Statistical technique for two variables

What statistical technique is best to analyse two variables, one being type of downloader (illegal, legal and mixed) and the other is number of devices (which can be 1-7)? To see whether there is a ...
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9 views

How to create a bar chart? [migrated]

I want to create a bar chart with multiple variables on the x-axis. I have variables on type of downloader (Legal, Illegal, Mixed), age (16-24, 25-34, 35+) and gender (Male, Female). On the y-axis i ...
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20 views

How to do Simulation for Time Series Model using SPSS

I am totally new to SPSS. I have a question on Simulation. Can we apply simulation for time series model using SPSS? Thanks in advance.
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5answers
81 views

Unequal variances t-test or U Mann-Whitney test?

I have two independent samples and I need to compare their values, to say if values in the first group are higher than values in the second group. I performed the Levene's test and the variances are ...
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0answers
20 views

How to apply GEE and how to use it for critical mass

sorry I am completly new to the forum and as well to using GEE and SPSS so I hope my question is not to confusing. My dependent variable is the firm performance and I have several controlling ...
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2answers
54 views

should i take this variable which consist only 1 question in factor analysis? (all other variables are based on multiple questions)

I'm conducting a study on internet shopping adoption. I'm using a structural model from a research paper. My supervisor has asked me to conduct a factor analysis using SPSS. I'm quite weak in stats ...
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0answers
11 views

Why does “repeated measures” not appear under “analyze - glm” menu in SPSS? [migrated]

This is my first time using SPSS for doing within-subjects ANOVA. Every tutorial I see tells me that I should go to analyze -> General Linear Model -> Repeated Measures. The problem is that under ...
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1answer
19 views

ANCOVA: ordinal covariate on SPSS

I'm trying to run an ANCOVA on SPSS with 3 variables: Gender, score 1, score 2. I want to control for the possibility that gender has an effect the scores, in order to isolate just the relationship ...
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1answer
27 views

Can I use the chi-squared test of independence with skewed data?

I have two variables, both categorical, one with skewed responses. How do you deal with skewed data in the chi-squared test? Are there any other relevant tests? I want to perform the test in SPSS.
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13 views

Comparing groups using SPSS

I have a dataset with 2 measures that were tested over 30 time points. I have a two groups of people who have both measures at all 30 time points. How do I compare the groups using SPSS?
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1answer
20 views

Bootstrapped t test in SPSS: Why are some p value cells blank?

Using an independent samples t test, I am comparing the performance of 2 groups on an activity, based on the percentage of items correct (the percentage of total items correct, as well as percentage ...
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1answer
51 views

ISPSS: Cross-sectional time series analysis

I am trying to run a multiple regression in SPSS. I am using panel data with 4 independent variables. Of these, one is a dummy variable. Can someone please guide me through the process or give me ...
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4 views

Managing data sets in SPSS where multiple cases appear in one row [migrated]

I'm working with a data set which has details on multiple people on one row. How I've dealt with this is to have variables like this: P1Name P1Age P1Gender P1Ethnicity P2Name P2Age P2Gender... etc ...
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1answer
17 views

How to paste SPSS output using the LIST command into SPSS - the output all pastes into one cell [closed]

If I use select if and then list some variables, the output appears as a plain text table in the output viewer. When I paste this into Excel it all goes into one cell. I've tried the copy special ...
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1answer
72 views

How do I “nest” data in a mixed-effects model? and MANY related questions about mixed effects models!

I treated 80 people with drug X and 80 with drug Y. I presented the drugs to them in groups of 10 (meow groups). The drug was consumed for 15 weeks. They reported the severity of their headaches (from ...
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1answer
27 views

45th and 55th percentile

I have a series of data from a household budget survey and want to do the following in SPSS: Identify the food expenditure shares of total household expenditure that are at the 45th and 55th ...
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48 views

NEED ANOVA HELP ASAP!

I have been looking at my stats results for 4 days now and I cannot figure out how to interpret the results. I conducted a within subjects experiment in which participants rated 4 neutral symbols on ...
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12 views

How do I convert unstandardized RMR estimates into standardized RMR estimates?

I am having difficulty turning unstandardized RMR estimates from AMOS software output in a SEM into standardized estimates to enable suitable interpretation. Can someone give me advice on where to ...
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1answer
54 views

Using Univariate ANOVA with non-normally distributed data

If my data are non-normally distributed and I'm conducting a 2x2 ANOVA, what can I do to correct for this problem so I can report the main effect and interaction output appropriately? Only one ...
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32 views

repeated measures ANOVA with covariate

I conducted a repeated measures ANOVA and added a continuous covariate. Now there is a significant main effect of that continuous covariate. If I report that main effect I need to say something about ...
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1answer
67 views

Statistical significance for comparison of linear regression models

I have two linear regression models (with the same predictors) that try to estimate two different (although related) features of the same population. I am analyzing the hypothesis that these ...
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33 views

Fisher's Exact: why no test statistic for 2x2 tables in SPSS

Whenever I have used the Fisher's Exact test on tables larger than 2x2 contingency tables, SPSS has produced a test statistic that I can quote in my work. However, when I do the same with 2x2 tables, ...
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1answer
64 views

How to compare pre- and post-tests when subject identifier is missing?

My colleague and I are professors and we conducted an experiment in which we would please like some advice on deciding which tests to use in SPSS. He taught 4 classes of students on 2 different ...
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17 views

Linear Mixed Models with variable time points in SPSS

I am analyzing a clinical study measuring patients' symptoms and brain structure sizes over three time points. The "visits" should be at baseline, 3 months and 12 months but they vary considerably and ...
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1answer
63 views

Statistically prove the effectiveness of a treatment using GLM repeated measurements

I have two lots of samples: one is the control lot and the other undergoes some treatment. I did three measurements for the samples: one at the initial time (T1) ...
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1answer
31 views

Constant forecasts in SPSS

I have weekly data for the last four years. I am using SPSS to do forecasting. I am getting a constant value in the forecast period. What could be the reason behind it? Is it due to defining weekly ...
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1answer
47 views

Can i do a paired t-test on a pre- and post questionnaire but without pairing the same student for the pre and post?

I really suck at this so hope you could help me ve a group of people attending a training course, in order to measure whether the training course is effective in improving attendees' knowledge. We ...
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3 views

Creating a table showing the number of common values of two intersecting variables [migrated]

I want to make a table such that rows and colums are my variables and each cell shows the number of common values of two intersecting variables. For example I have the following variables with the ...
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1answer
48 views

How to combine several categorical variables into one quality of health measure?

I am new to SPSS, and am trying to use SPSS to generate a variable on the quality of health service available to the residents of an area. Below are the categorical variables that could tell me the ...
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1answer
50 views

Save R MICE Imputed Data as SPSS data

I am calling the R MICE routines into SPSS to do multiple imputations. My question is how to save the multiple imputed data sets as SPSS files for later analyses. Any help would be greatly ...
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65 views

Which graphs are best suited to visualize multiple pre- and post-test scores between multiple groups?

I have a relatively small sample ($N = 64$) with the following variables: ScoreA_I: continuous pre-test response variable ...
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1answer
47 views

Confidence interval does not include 0, but Wilcoxon test is sgnificant

I've created an error plot with CI 95% to visualize the difference (post test - pre test) between achieved scores. n = 64 Judging from the confidence intervals one could conclude that there's is ...
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1answer
28 views

Does power of a test depend on number of cases or number of observations?

Cases and observations. It is my understanding that sample size is determined by the number of individuals taking part in an experiment (from my undergrad Psychology stats course). For each ...
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30 views

How to code and analyze skiped questions with SPSS

sorry if my question may seem rather silly, but I'm not well up on statistics and need a piece of advice. I have some cases in my dataset where respondents have abandoned the survey half-way, so I ...
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32 views

random effect in mixed linear model SPSS

I am using a mixed linear model to analyze the effect of two types of treatment on symptoms. The two treatments were administered in smaller groups (clusters), and delivered by several doctors, so I ...
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0answers
20 views

How can I statistically compare two time-series? [duplicate]

I have two time-series. Data have been logged over time for two different objects. Is there a significance test, applicable in SPSS or Minitab, that can be used to determine whether there is a ...
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2answers
75 views

Correlation and group difference with unequal sample sizes

My sample is 60 participants. At first, I did not expect to analyze the correlation, but the result is interesting, so I would like to. The 60 participants are 50 people who have good reading skill ...
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0answers
11 views

Should I include multiple mediating variables in the same analysis?

If the answer is "it depends", what does it depend on? I have three mediating variables, one predictor variable and one outcome variable. I have observed that the results I get when I run three ...
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35 views

SPSS: How to decompose interactions in repeated measures ANCOVA?

I conducted a study with three categorical within-factors and one continuous personality variable: topic (1,2) x gain loss framing (1,2) x achievement security framing (1,2) x personality I know how ...
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0answers
28 views

Composite Scores and Standardized Composite Scores t test

I have a set of survey data related to 20 survey questions. Each of these questions represent a variable (Q1, Q2,......
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43 views

Discontinuity Regression

I'm writing a political economy Master's thesis regarding the effects of the Euro Crisis on the rise of separatism in Spain (Catalan independence for example). The idea is to show that the Crisis has ...
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1answer
47 views

Sample-adjusted meta-analytic deviancy macro/syntax for Excel, SPSS, MPLUS

I need to compute the sample-adjusted meta-analytic deviancy (SAMD) as part of an outlier search with meta-analytic data. Because we have a very large amount of meta-analytic data, computing this ...