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

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Dealing with Categorical variables in Multiple Regression

I have a data having 2 continuous and 4 categorical variables. Each categorical variable has 3 levels. I want to know how to include the variables in the model. I am using SPSS Variables: Sales - ...
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53 views

In SPSS, how to compare two scatterplots of separate bivariate data to determine if the distributions are similar or not similar?

In SPSS, I have created scatterplots of two continuous variables (X & Y) for two separate groups (G & P). Visual inspection comparing the scatterplots from the two groups suggests that ...
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19 views

binary logistic regression in spss version 22

I'm trying to run a Binary Logistic Regression. I have multiple IVs and 1 Binary DV. Can anyone show me how to do this with SPSS v.22? (or which one to select from this list) thank you
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19 views

Different means with barchart and descriptives in SPSS

I have a dataset (in SPSS 22) with different measurements of children, with the children in rows and with the measurements as variables in the columns. For example, the activity levels of the children ...
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1answer
137 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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4 views

Two Data Collection Method Groups

I have collected around 20 respondents by post; and by email around 150 respondents. I would like to know whether I can combine the two groups, the independent sample t test shows that there is a ...
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1answer
67 views

How can I find tendencies in specific cases between two groups?

I'm doing this project where we are investigating whether social networks can influence peoples distinctiveness. Briefly summarized, we have primed a group with a social media and another is the ...
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11 views

How to treat “Missing Value Analysis” test results (problems)

I have a problem with Missing Value Analysis. I am using SPSS version 20. I am trying to test whether missing values are at complete random. As I know in order to ensure missing values are completely ...
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9 views

How to identify contributors in groups of people

I have a set of 120,000 people. These people are assigned to 10 million groups. Each of these groups have a target variable indicating the kind of output it made (A, B, C or D). I'd like to identify ...
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30 views

SPSS: Pearson's r not significant but confidence intervals do not include 0

I have calculated the value of Pearson's r between two variables in SPSS, two tailed. Sample size is 81. The r value is -.02. The p value is .06. When I compute the 95% confidence intervals using ...
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1answer
174 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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23 views

Pearson Correlation for Clustered data

I have a sample that was drawn using cluster sampling. Let say I have variables x and y, and I would like to check the significance of correlation between those two variables in SPSS 20 taking into ...
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1answer
41 views

Binary or Multinomial Logistic Regression in SPSS: Interpretation and Reference Categories

I am trying to analyze my data using Multinomial Logistic Regression whereby my dependent variable is a clinical outcome (sick vs healthy) and 1 independent variables (Factors) are in several ...
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2answers
101 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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19 views

Should 'do not know' be included when reporting summaries of survey results?

When reporting the results of surveys, we often list the percentages of respondents who gave different answers. However, these percentages could be calculated including people who said 'do not know' ...
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1answer
56 views

Does free SPSS 16 actually exist?

My mother heard about free SPSS 16 and gave me the task of finding a safe download of it. However, I can't find any site (except torrents) that actually have it available, they all seem to use SPSS 16 ...
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2k views

Interpreting discrepancies between R and SPSS with exploratory factor analysis

I am a graduate student in computer science. I have been doing some exploratory factor analysis for a research project. My colleagues (who are leading the project) use SPSS, while I prefer to use R. ...
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2answers
27 views

Which test do i choose to conduct on my Likert scale data?

I have been doing plenty of research into which test I should use on my Likert scale data and i am becoming more confused as there are so many people saying different things. I am currently doing my ...
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12 views

SPSS Repeated measures with different pre-post measures

I have the following data: 20 participants, each one going through 2 types of treatments (A & B) at 3 different sessions (times). For each treatment session, i am collecting 6 "normal" ...
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1answer
153 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 ...
2
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1answer
17 views

Multiple value Chi Squared test in SPSS

I am currently doing a study into factors that affect mortality in a particular type of bacterial infection. I would like to compare certain patient characteristics. One of which is the specialty ...
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1answer
280 views

Factor vs. Covariate in SPSS MIXED

I am using the MIXED command in SPSS to run a multilevel model and was wondering what the difference is when using a dummy coded factor either as factor (via the BY command) or as a covariate (via the ...
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1answer
620 views

Mixed linear model with repeated measures in SPSS

I'm trying to run a mixed linear model analysis with SPSS. When I try to run the analysis, SPSS gives the following error message: ...
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2answers
467 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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26 views

Compare regression coefficients within one sample

I run two univariate linear regressions within one sample (same subjects, two different conditions). Now I would like to know how to compare the regression coefficients in order to find out whether ...
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2answers
2k views

Cronbach's alpha continuous and dichotomous data in SPSS

I have one question about using SPSS to calculate Cronbach's alpha of a measure that draws on two types of items: one yields ordinal data and the other dichotomous. The ordinal data are produced ...
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1answer
175 views

Post-hoc chi-squared multiple comparison tests using complex samples module in SPSS v. 20

This questions refers to computing cross-tabulations and chi-squared tests of independence through the SPSS complex samples module available in SPSS versions 19 and up. I am able to compute the ...
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17 views

SPSS Amos Binary Outcome - Model Fit

I was just wondering if anybody could help me, I'm conducting a path analysis in SPSS Amos with a binary outcome. I've specified the variable as binary using Tools>Data Recode, I've then calculated ...
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223 views

How to handle with missing values in order to prepare data for feature selection with LASSO?

My situation: small sample size: 116 binary outcome variable long list of explanatory variables: 44 explanatory variables did not come from the top of my head; their choice was based on the ...
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79 views

Calculate moving average of given variable list from AA to ZZ in automated syntax?

I would like to create a list of columns in SPSS like MACOL1, MACOL2 and up to MACOLn which contain 5 years moving average of a list of Tickers/Symbols/Variables using a short syntax like: ...
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8 views

Methods for measuring snowball effects in a “complete” longitudinal dataset

I'm looking for ways to test for "cumulative advantage" effects in a longitudinal dataset (see image) I guess the data set is principally similar to this: http://www.caldercenter.org/whatis.cfm , ...
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60 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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14 views

SPSS mediational analysis help

I'm doing a psychology project and I'm struggling with statistics (SPSS) especially on meditational analysis. I have searched all over my notes from my bachelor degree but there is nothing on ...
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1answer
25 views

Time series: Stationary R-squared vs R-squared (Forecasting in SPSS)

I would like to check how two time series are correlated - how one of them predicts the other one. I have data for 27 years. I conduct my analysis in SPSS (Forecasting command, ARIMA) and I get: ...
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197 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
778 views

Comparing groups at different time points within repeated measures study using SPSS

I have done a RCT (randomized control trial) of an intervention (which is of 6 week duration) versus control. The outcome measure (an exercise test) has been tested pre-intervention (Pre), immediately ...
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1answer
35 views

Difference in difference using spss

I have 2 groups of patients (control and treated) and 1 variable measured at two time moments (before and after treatment). Using paired T test I am able to determine the mean (with 95%CI) difference ...
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1answer
119 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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10 views

How to get odds ratio when combining multiple tests in logistic regression in spss?

we get odds ratio in logistic regression for predictive accuracy of a test. how do we get one odds ratio from combining more than 1 test in predicting outcome? how do we enter the data to get this in ...
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1answer
28 views

When making a predictive model that is predicting a continuous outcome, how does one arrive at the final prediction?

For instance, a prediction of 1 million could be: A weighted average of various predictions. ex. a .5 chance of 2 million, a .5 chance of 0, for an expected value of 1 million; or The prediction ...
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1answer
20 views

Do I run a one-tailed or two-tailed test when running Spearman's correlation between interval and ordinal data?

I have one interval variable on a 1-25 point interval scale, i.e. placement test scores where 25 is the highest competence score (data not normally distributed), and six different ordinal variables on ...
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1answer
53 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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2answers
1k views

How do I do nonlinear generalized estimating equations in SPSS

Say I have two conditional media for bacteria growth: a bacteriocidal drug and control. I want to see the effect of my bacteriocide on culture growth, so I set up 6 flasks: three with drug, three ...
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7 views

What kind of statistical method is recommended to compare ratio in pre-test and post-test

I want to compare two different ratios. When this ratio is close to 1 it shows the better stability in the body. Would you please guide me that which statistical test is better for this situation? ...
4
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1answer
320 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 ...
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1answer
63 views

Can AMOS be used to perform logistic regressions?

I need to compare 11 groups of data, for the same relationship. My first thoughts were to create 11 regression equations (one for each), and to compare parameters between groups. Problem is that ...
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4answers
16k views

How to correlate ordinal and nominal variables in SPSS?

I have imported an Excel document in SPSS which contains around 500 entries. Three columns are defined, using Likert scales. I have substituted textual labels of these scales with numerical values ...
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24 views

Understanding repeated covariance types in SPSS?

I am working in SPSS on a repeated measures linear mixed model and I am having a really hard time wrapping my head around how to select a "repeated covariance type". The options are: ...
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10 views

How to get/calculate confidence intervals for slopes of the continuous*categorical interactions?

Not sure if this should be in Stack Exchange or here, but here goes. I have a linear mixed model in SPSS, and I want the confidence intervals for slopes of the continuous*categorical interactions. ...
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1answer
23 views

Multinomial logistic regression low classification rate

I am running a multinomial logistic regression with SPSS and I have encountered a problem (?) with my data. I have a dependent variable (DV) with three categories, five independent variables (IV) as ...