Questions tagged [spss]

SPSS is a statistical software package. Use this tag for any on-topic question that (a) involves SPSS either as a critical part of the question or expected answer and (b) is not just about how to use SPSS.

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15 views

Two-way ANOVA when data is non-normally distributed

I'm trying to run a two-way ANOVA on a 375-sized dataset. I'm trying to navigate my way through the assumptions but need some assistance. Specifically, I have two groups as the IVs (1: Boys and Girls; ...
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12 views

Two-way repeated measures ANOVA vs mixed ANOVA

I collected data from 50 patients at 3 different time points and performed analysis using 3 different methods. What would be a more appropriate test to compare the measurements between time and ...
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1answer
32 views

In making scatterplot for correlations between two continuous variables, can we use the choice cubic instead of linear choice [closed]

In making scatterplot for correlations between two continuous variables, can we use the choice cubic instead of linear choice in "create a fit line at total", as shown in the copied Figure, please? ...
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10 views

Variance of Simple moving average [closed]

Pls how can calculate the variance of moving average?
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12 views

SPSS: Script to replace one value by a new value across all variables [closed]

I would like to replace the value 999 by 99999 across all my variables. The SPSS dialog "Find & Replace" works for one column/variable at a time only. Can someone help out with a script to make ...
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1answer
21 views

Defining the number of multiple comparisons for a Bonferroni correction

I have a 4 (Time) x 3 (Size) x 3 (Type) Repeated Measures ANOVA. Since SPSS does not allow post-hoc analysis for repeated measures, I had to run individual t-tests one by one. Assuming that I am only ...
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28 views

Excluding user defined missing values (=conditional NAs) from multiple imputation in SPSS

I've got a dataset with survey data. Since some items are not applicable to every participant, I assigned a user defined missing value (i.e. 990). If an item was applicable for a participant, but was ...
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10 views

Odds Ratio for Interaction Terms in GenLin in SPSS

I have a generalized linear model using SPSS to determine the relationship between certain variables (sex, race/ethnicity, geographical area, etc.) and whether or not they use a computer. Also, we ...
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0answers
12 views

MANOVA contrast results p-value in SPSS - Bonferroni correction required?

I am running a MANOVA with 2 IVs(2*3) and 4 DVs. I want to test the effect of the 3-level IV using a Helmert contrast: to compare if level 1 significantly differs from the mean of levels 2 and 3, as ...
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28 views

SPSS coefficients not significant but anova is

the coefficients on my spss multiple regression are not significant eventhough my anova is. I don't know how to explain this but im doing different physical activity intensities and seeing their ...
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0answers
12 views

Analysis of imputed data [duplicate]

I have 3 questions regarding the analysis of imputed data. I have an idea how to do the analysis, but want to confirm with you guys that it's the correct way. 1) I had a dataset with missing data for ...
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0answers
37 views

Trouble with imputed data set

1) I had a dataset with missing data for baseline variables and outcome variables. Through multiple imputation in SPSS (10 imputations, 50 iterations, PMM for scale variables) I imputed the missing ...
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1answer
21 views

SPSS Chi square of one sample test

I am trying to analyze the following data: participants chose over 18 trials whether they would like option 1 or option 2. Option 1 is recoded as 0, option 2 is recoded as 1. Now if I count all ...
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17 views

Mediated Moderation or Moderated Mediation?

let's say I have two groups (variable G) and another variable such as stress (variable M). The two groups differ within stress. Now I want to examine how the relationship between freetime (variable X) ...
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15 views

Testing for normality in SPSS: Procedure for two or more independent variables WITHOUT levels/groups [duplicate]

In order to do a linear regression, I need to test my data set for normality. I have one dependent variable plus three independent variables. The independent variables are all scale variables, i.e. ...
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1answer
15 views

SPSS Binary Logistic Regression - intercept (baseline) model not significant

I am working with a binary logistic regression in SPSS and my current issue is that my baseline model is not significant (0.440) (Block 0 "Variables in the Equation), my Omnibus-test however is and ...
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0answers
27 views

I want to analyze the relationship between diabetes mellitus and hypertension?

I have data of blood pressure, fasting blood glucose and post prandium ( which means blood glucose level after 2hrs of having lunch). I wonder if I have to analyze with each data such as fasting ...
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2answers
32 views

Binary logistic interpretation (spss)

I'm trying to conduct a binary logistic regression to see how each feature of male crabs contributes to being selected by females. the dependent variable is being selected or not selected which is ...
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0answers
14 views

Anova mixed- between and within

Hello my name is Francisco and i am having a big doubt in a statistical exercise in spss. that is i have two indpendent variables, each one with two level: sistem production: soil, substrate variaty:...
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1answer
33 views

CFA items are averages: should we account for the variance?

Imagine a standard confirmatory factor analysis with one latent variable, L, causing the observed variables (items) q1, q2 and q3. It is my goal to rank all observations on their estimated scores on ...
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37 views

How can I make a scatterplot with two grouping variables (group and subgroup)? [closed]

I'd like to make a scatterplot with my dependent variable (scores on test A) on the y-axis, age (continuous) on the x-as and group (autism vs. control) as grouping variable, but also subgroup (people ...
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1answer
56 views

How to figure out the direction of a Generalized Linear Model?

I'm trying to figure out the direction of my data from my GLM output analysis. For example, with linear regression, you can plot the x and y values on a scatter plot to determine the direction of the ...
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6 views

Is there a way to see if there is a statistically significant mean change between two treatment groups in a repeated measures MANCOVA?

I have conducted a study with one between-subjects factor (control, low experiment, high experiment), a within-subjects factor (Time 1, Time 2), a covariate, and three DVs. Participants completed the ...
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1answer
17 views

How to intrepret one significant and one insignificant mediator and a significant direct effect in PROCESS?

I have conducted a mediation analysis with two mediators using PROCESS. My findings are that in X -- a --> M1 -- b --> Y, a and b are significant. However in X -- c --> M2 -- d --> Y, only d is ...
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0answers
7 views

Power Law with log of DV against log of CDF

I am trying to find a way to proof that my DV follows a distribution close to power law. How is this possible with SPSS? Is there a way to plot the log of the DV against the log of the CDF? I am ...
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2answers
38 views

Insignificant two-way MANOVA results - what do I do next?

I am very very new to stats. I decided to try and do a MANOVA in SPSS, my between-subjects IV is gender and my within-subjects IV is the two conditions in which all participants took part. My DV is ...
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1answer
105 views

Is there a standard measure of fit to validate Exploratory factor analysis?

I am modeling Exploratory Factor Analysis in R, Python, Mplus, and SPSS with maximum likelihood method and Varimax orthogonal rotation. However, each software gives different measures of fit and I am ...
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1answer
24 views

Dealing with unequal measurements in MLM or ANCOVA

I am tasked with analyzing a preexisting dataset. The experiment is fairly simple, but I'm finding that analyzing the data is challenging due to the fact that the experimental design is not ideal for ...
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0answers
21 views

Interpretation of between subject factors from a Mixed Models Anova with non-significant within factor effect

I just received results from a 91(Electrode-Combinations) x 2(Groups) x 2(Condition) mixed model ANOVA design, where Condition is the the within-subject factor or more precisely the repeated measures ...
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2answers
64 views

Chart indicates homoscedasticity but Breusch-Pagan test p<.001

I am writing my master's thesis and doing multiple regression analysis for hypotheses testing. I transformed the data using ln and use a sample with N = 15,000. As a result of the assumption test, I ...
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2answers
49 views

Is there a non-parametric alternative to Two-Way Repeated Measures Anova?

I am currently comparing the EEG funcional connectivity measured at 14 electrodes and 4 frequency bands between highly and lowly hypnotic susceptible individuals. I extracted the coherence and the ...
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0answers
17 views

main effect significant while interaction insignificant in moderation analysis?

Please help with the following output. I have two IVs Example: (happiness IV1) (genderIV2) say on performance (Dv). question 1- I ran simple regression for happiness and performance as well as gender ...
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1answer
9 views

When reverse item loaded on one factor when they are not supposed to

I'm conducting a survey online and one of my measurement is 'Credibility' variable, which uses total of 9 variable (see image). These variables are supposed to fall into three dimensions, which are ...
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1answer
146 views

Why is time series forecasting different for each software?

I have 2 different software programs: SPSS, and Statgraphics. I am using them for time series forecasting but Each one gives different arima parameters when using the auto ARIMA model, and The ...
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1answer
25 views

Box-Ljung Statistic and, standard errors of ACF and model fit statistics in SPSS

I am just trying to fit a simple ARIMA(1, 0, 0) model in SPSS TSMODEL for 10 data points (90, 100, 110, 120, 130, 140, 70, 98, 88, 65, and 60, representing 10 years of data). However, when I looked at ...
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1answer
27 views

Hayes Mediation Tables with binary outcome variable

I am trying to put together mediation tables for my study which has a binary outcome variable. Normally, I report the R-squared and F statistics for my mediation model. However, SPSS Process does not ...
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2answers
825 views

How do I test if regression slopes are statistically different?

I have a set of data that is composed of a measured parameter (dependent variable) as a function of time (independent variable), before and after an intervention event. I have calculated slope and ...
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1answer
25 views

Significant total and indirect effect but insignificant direct effect [duplicate]

I was trying to use a simple mediation model (the classic triangular model) to test my hypothesis. However, my data exhibited a significant total effect and a total indirect effect, with the direct ...
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0answers
34 views

Differences in LSMEANS in R vs SPSS

I am trying to replicate results from SPSS in R. The model is a repeated measure ANCOVA. Funny enough: all the estimated parameter are the same (beta-coefficients, mean differences for contrasts) but ...
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1answer
16 views

How to determine the correct analysis from two variables?

so I'm trying to determine what the correct form of analysis I need to use to find out if people who drink one can of cola per day have different amounts of acne from those who don't drink a can of ...
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1answer
23 views

sample size calculation for multivariable analysis

How can I calculate the power or the adequate size of my population in a Cox multivariable regression analysis where I'm testing the association of different independent variables with my dependent ...
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2answers
62 views

How can I create a new variable from answers that come from two different variables? [closed]

I have two variables: RACE & HISPANIC RACE has 5 responses 1-White 2-Black/AA 3-Asian etc. I am interested in those that answered 'White' HISPANIC has 13 responses 0-11=Hispanic countries 12-Not ...
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1answer
7 views

What stat analises to use? In SPSS

What analises to use? MANOVA? And how? I have a following design: Two groups made the same task and the result I have in Reaction times ( dependent variable). I have three additional variables (...
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1answer
58 views

Multiple Linear Regression with Mediator in SPSS

My variables (all continuous): IVs: Secondary Traumatic Stress and Vicarious Traumatization DV: PTSD Mediator: Social Support I checked the correlations between the variables and they are all ...
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1answer
14 views

Can I complete a Moderation Analysis with transformed data?

I am completing a moderation analysis (model 1) in SPSS with the Hayes PROCESS macro, however I had previously applied a logarithmic transformation to my outcome and moderator variables for them to ...
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2answers
32 views

Does negative Z score in Cochran-Armitage test implies the presence of an increasing trend?

Given the p-value is less than 0.05 does negative Z score in two-sided Cochran-Armitage test implies the presence of an increasing trend?
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1answer
32 views

SPSS and Linear Mixed Models

I hope you would be able to help me! I am working on a LMM in SPSS right now and I've gotten to the point where I don't really know what to do. I am looking into comfort (so that is my DV, measured ...
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0answers
22 views

Regression: How to account for grouping among dependent variables [closed]

updated to clarify what I'm asking... I have a data set where each respondent provided a "rating" on multiple objects (i.e 50). There are also attributes measured for each respondent (i.e. Age, ...
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1answer
25 views

Check normality assumption for a 3 by 2 within-between (mixed) ANOVA

I'm conducting a 3 (within) x 2 (between) mixed ANOVA in SPSS and would like to assess whether my data satisfy normality assumptions. Do to so, I have saved the unstandardized residuals from the ...
2
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1answer
96 views

Do I need a Bonferroni correction on a 2x2 chi-squared analysis?

I'm really hoping someone here can help. I have performed a chi-square test of independence, looking at men/women and early/late drop out from therapy. I have a p-value of 0.047. Do I need to do any ...