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

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21 views

Repeating ANOVA analysis after dropping one factor: different means

I had to repeat the analyses after dropping out one of the between-subject factors (order of the questionnaires) and the new means I got for other effects were different from those I had before. Can ...
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0answers
18 views

A research containing the statistical difference between two samples

I have conducted a research in which 120 people participated. For my survey I created two visual images (casual and clown). Sample 1 (n=60) conducted the interview with the casual person Sample 2 ...
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0answers
50 views

comparing two groups on ordinal data with covariates

Hi I am using SPSS to compare two groups on ordingal data (frequency of substance use): never, 1-5/week, 6-10 week etc. The substance use data is highly skewed and non-transformable so ANOVA is out. I ...
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0answers
22 views

How to wrap up individual One sample t-test results in a single one, in SPSS?

I'm evaluating a questionnaire about job satisfaction, based on Likert scale. As for any questionnaire, there are some correlated questions assessing one factor. Since I’m using SPSS, I know that I ...
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2answers
230 views

Visualizing data spread along both y- and x-axis in 2D scatterplot

I'm currently in the process of doing a literature review of a brain atrophy measurement, called BPF, commonly used in research regarding neurodegenerative disorders. I have searched for publications ...
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0answers
34 views

How to get overall result from One Sample t-test in SPSS?

I'm evaluating a questionnaire based on the Likert scale and Here's the problem. I want to assess job satisfaction which has been sub-categorized into ,let's say, 5 questions ;so I have 5 different ...
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7answers
2k views

Why is “statistically significant” not enough?

I have completed my data analysis and got "statistically significant results" which is consistent with my hypothesis. However, a student in statistics told me this is a premature conclusion. Why? Is ...
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0answers
102 views

Logistic regression model internal validation in SPSS

Please help! I have developed a logistic regression model for prediction of a binary outcome at a range of different times following a set point. This gave me different models with different ...
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0answers
17 views

Repeated measures ANOVA with unbalanced data [duplicate]

I am a master's student, and I need your help. I did experiment on one group of rats, the group was tested during 8 days, this is the first stage. The same group was also tested again but this time ...
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0answers
59 views

Learning curves and SPSS

I followed a course on machine learning. The analysis of learning curves on the cross-validation set was recommended, as a way to see in what respect your model can be improved (more data, more ...
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0answers
29 views

ANOVA repeated measurements

I am a master's student, and I need your help. I did experiment on one group of rats, the group was tested during 8 days, this is the first stage. The same group was also tested again but this time ...
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0answers
66 views

SPSS GLMM Data Structure setup advice

I am running an analysis looking at individual voter turnout where it is a 1 for voting and 0 for not voting. I have some information on individuals including age, gender, and several years of past ...
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0answers
27 views

spss covariates variables in regression model

in the regression model in the spss statistic software can you explain me what are the covariates variables? if i want express a model like ...
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1answer
94 views

Multiple imputation for missing values

I would like to use imputation for replacing missing values in my data set. I have some constraints , for example I dont not want imputed variable x1 be less than ...
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0answers
80 views

How to compare differences in the mean when the data isn't normal

I have two sets of mean data that I have done a Kolmogorov-Smirnov test on. The tests came back showing that one data set was normal, but the other was not. The two data sets are independent of each ...
2
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1answer
157 views

Non-normality of residuals in linear regression of very large sample in SPSS

I have a dataset of ~17,000 cases in SPSS 21 with which I am trying to run multiple linear regression. I have plotted the Studentised residuals against the unstandardised predicted values and also ...
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1answer
75 views

How do I model repeated measure + random effects with SPSS mixed

I'm having trouble understanding what a correct model for my data should be, and also if it would even be a good idea to make it a single model. At the basis it is a rather simple regression model ...
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2answers
96 views

Frequency of combinations possible

I have an SPSS data set with 700+ respondents and 13 products that they could own. Each product has its own variable Product01 = 1 means they own product 1 Product02 = 0 means they dont own product 2 ...
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0answers
10 views

How to obtain aggregate estimate of a factor with various levels in General Linear Mixed Models

I run general linear mixed model with factor 'Substitutability' with seven levels in SPSS. It gave six level estimates. I want to calculate aggregate estimate for 'substitutability'. How to get? ...
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1answer
325 views

Linear/Non-linear Regression - SPSS

Hopefully somebody will be able to shed some light on my SPSS problems! I have been given 65 values. 57 of these data values are quarterly results and 8 are the holdback data to be used. I have to ...
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1answer
636 views

Mann-Whitney U test with very large sample size?

I'm doing a Mann-Whitney U test to compare two very large samples (sample size 1 = 13250; samlple size 2 = 38871) originating from a raster image. I know t-tests are not recommended to compare ...
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2answers
65 views

SPSS Batch Processing Method

I have a more than 150 list of products that will be analyzed by regression method based on years. For example: products: A,B,C ... N (150th products) Then ...
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1answer
217 views

Dataset of repeated measures with unbalanced sample size and unequal variace - What to do?

I have a dataset of three groups of cells treated with 10 different compounds and am not sure how to check for significant differences between those treatments. Within each group the data is also ...
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0answers
46 views

Grouped data analysis in SPSS

I have a question about how to analyze some questionnaire data. I have three different participant groups: A,B,C and each group people did the same questionnaire. So I have a total score for that ...
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0answers
57 views

Chi-square analysis

I am trying to determine association between my independent variables (categorical, nominal) and dependent variables (categorical, nominal). What other statistical analysis I can use aside from ...
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0answers
44 views

Model comparison in SPSS

I have two models with 24 variables in each. I want to see how adding an extra variable (the variable in study) affects the outcome. I used generalised linear mixed models for both models.(GENLINMIXED ...
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0answers
21 views

Analysis to perform [duplicate]

So I am using SPSS, but not sure what analysis to run if I am trying to determine if there is any difference between pre-post survey results in one group. So basically I have a group that has pre-post ...
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0answers
27 views

What analysis should I perform? [duplicate]

What analysis should I perform if I am trying to find if there is an association between socio-demographic variables and my dependent variables. All my variables are categorical nominal. Also I am ...
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2answers
124 views

How to get the median of a row in SPSS? [closed]

I have a data in SPSS structured like this: student_number age study_for q1 q2 q3 q4 q5 q6 q7 q8 (<-- these are columns) There are students with numbers from 1 to 67. For each of those students I ...
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0answers
41 views

Multinomial regression analyses

My dependent variable is categorical (with 3 levels) and my predictor variables are a mix of continuous (age in months, test 1 score, test 2 score, test 3 score) and categorical (gender). I believe I ...
2
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1answer
134 views

Missing data SPSS paired samples t-test

I have approximately 20% data missing in my sample (n=3215). I aim to assess the pre-post differences on a psychometric scale. Especially post measures are missing because of follow-up issues. What to ...
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0answers
74 views

Mixed Model t Test (Toothaker’s t-Test)

I'm trying to do a follow up test for a mixed model ANOVA, and I figured that I need do a Mixed Model t test also known as Toothaker's test. I just don't know how do it. I was wondering if anyone has ...
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0answers
40 views

How to plot a Perception Map

I want to plot a perception map for two brands, Pepsi and Coke, with attributes sweet, caffeine, refreshment, color, likeability for each brand. I got the sample from a blind taste test.
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2answers
161 views

Logistic regression, SPSS ignores my reference category and assumes another one

I am modelling logistic regressions in SPSS, the same model for different countries (well, with slight differences in the independent variables set due to collinearity diagnosis and stepwise results). ...
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0answers
70 views

Mixed Model ANOVA interpretation

I am using SPSS to analyse the 3-way mixed model ANOVA of my study. I have split my variables down to interpret simple interaction effects and found that whilst the graph displays an interaction ...
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1answer
86 views

Inverted SPSS results: Logistic regression command vs. Genlin?

I want to do a logistic regression in SPSS. However, since I analyse unemployment spells the subjects are sometimes repeated (violating the independence assumption of the regression). One way of ...
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0answers
56 views

How to analyse environmental temperature datasets

I need some advice regarding my statistical analyses with SPSS. I have a dataset of temperatures recorded automatically every 30 minutes in three different habitat types for the same time frame. I ...
2
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1answer
63 views

Standardization in SPSS

I have a survey based on a Likert-scale (1-5) with around 20 variables and 140 cases. Since some people only cross from 1 to 3 for all questions (variables) and others cross 1-5, I want to standardize ...
4
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3answers
155 views

Pooling regression results in SPSS

I have to solve the following issue: I run my linear regression model many times (let's say 1000 times) with two variables: y - continuous dependent variable, x - continuous independent variable ...
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1answer
238 views

Use correlation to compare two time series?

I have two time series data sets which contain hourly-intervalled, monthly, and yearly household electricity consumption in kWh. One data set is produced by a simulation, the other gathered from the ...
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0answers
58 views

Transformations used in Automatic Linear Modeling procedure in SPSS

I am using Automatic Linear Modeling in SPSS. Does anyone here know what are the transformations option which is suggested in that procedure?
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1answer
179 views

For 5 point Likert scale questions and binary dependent variable, which regression analysis should I use?

For 5 point Likert scale questions and binary (0 or 1) dependent variable, which regression analysis should I use? Can I use a binary logistic regression on SPSS? There are two or three questions to ...
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1answer
247 views

How to identify outliers for PCA

I want to conduct a PCA in SPSS. One assumption for PCA is that there are no significant outliers. How can I identify outliers in SPSS?
2
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0answers
40 views

Which model for data which has within-effects, between effects and non-parallel lines

My data (Panel, 19 countries, 7 years, ordinal outcome variable) has within-effects (countries over time), between effects (between countries) and it seems as if the slope of lines (test of parallel ...
3
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1answer
223 views

Post-hoc test in two-way ANOVA

I am doing a two-way independent ANOVA using type of organisational change (5 levels) and job level (7 levels) within the organisation as the factors (in SPSS). I followed Andy Field's procedure ...
3
votes
1answer
1k views

Is it acceptable to use linear regression to predict a 4 point likert scale from a 7 point likert scale?

My dependent variable is measured on a 4 point likert scale and independent variable is measured on a 7 point likert scale. Is it appropriate to run regression analysis on such data with varying ...
0
votes
1answer
245 views

Cluster analysis on ordinal data

I'd like to perform a cluster analysis on ordinal data (Likert scale) by using SPSS. I have around 140 observations and 20 variables that are scaled from 1 to 5 (1: I strongly agree, 3: neutral, 5: I ...
0
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1answer
99 views

What's “Relative Error” in a neural network model?

I'm using SPSS for building a neural network model. In the model summary there is a measure called "Relative Error". What's the formula for it? Is it related to sum of squares error?
4
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1answer
188 views

How to check if factor structures in two groups are similar?

After doing semantic differential experiment with two different group of people, there is need to do Factor Analysis, and after that to compare group's coordinates in factor space. I did factor ...
2
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0answers
114 views

What is the best software for neural network analysis? [closed]

I need to fit a neural network to my data. I used SPSS 21, but I think it's model summary isn't sufficient. I also used R (nnet & neuralnet), it has a poor report and I can't find a good model ...