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

learn more… | top users | synonyms

0
votes
0answers
14 views

Comparing correlations for significance

I am wondering how I would do the following in SPSS. I have a question (question 1) that was asked once before treatment, then the group was split into two different treatment groups (let's say ...
1
vote
1answer
35 views

How to compare means of repeated measures between groups in SPSS

I'm having trouble regarding which test to run on my data in SPSS. I have two groups (condition1 and condition2) which is also my independent variable (categorical). Both groups were asked to rate ...
5
votes
3answers
837 views

My distribution is normal; Kolmogorov-Smirnov test doesn't agree

I have a problem with the normality of some data I have: I've done a Kolmogorov test which says it isn't normal with p=.0000, I don't understand: the skewness of my distribution =-.497, and the ...
0
votes
1answer
60 views

Leave-one-out cross validation

I am working about elaborate a simple linear regression so I need to evaluate many models. I am asking how I can use leave-one-out cross validation to validate a simple linear regression.
1
vote
3answers
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 ...
1
vote
0answers
51 views

Leave one out cross validation for rare events logistic regression in SPSS

I am writing thesis about predicting which corporate takeover targets attract a competing bidder. I first estimated a model using a logistic regression. The sample consists of 1350 single-bidder ...
0
votes
0answers
22 views

Spatial and temporal effects in water quality data

The data I have is 20 sampling points in a water distribution network that have been sampled weekly during 4 months for different parameters (chlorine, turbidity, disinfection by-products, ...). Some ...
4
votes
1answer
28 views

Predicting variance of heteroscedastic data

I am trying to do a regression on heteroscedastic data where I'm trying to predict the error variances as well as the mean values in terms of a linear model. Something like this: $$\begin{align}\\ ...
0
votes
0answers
26 views

How to report the Pairwise comparison in SPSS

I am using a Kruskal Wallis test for my thesis and want to report the results from this test. However, one of the plots from this test is a pairwise comparison test, which I do not understand. Can ...
2
votes
2answers
282 views

How to select a subset of variables from my original long list in order to perform logistic regression analysis?

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 ...
2
votes
1answer
38 views

Which test to use to measure if target has been met?

The photo below is an example of the result i would like to obtain using the test which i cannot find in the article itself, i was hoping maybe any of you would know. I have tried to carry out chi ...
0
votes
0answers
17 views

Split plot ANOVA or t-test

I did a study in which I wanted to see if a teaching intervention would have an effect on student learning. I nonrandomly divided students into two groups, a control and experimental group, and gave ...
1
vote
0answers
20 views

Assessing Cannibalization, intervention of new mobile app on monthly sales

I am a beginner in statistics and looking for suggestions from you all on the approach for one of my study. For my study, there is a company which sells products via its online website (lets call it ...
1
vote
1answer
38 views

Using descriptive statistics as input in SPSS

I want to perform a repeated measures ANOVA in SPSS using the descriptive statistics. So my input is: ...
0
votes
0answers
24 views

MIXED modeling of 2 within-subject factors with 2 repeated factors and df

This is a novice question regarding MIXED models, denominator freedom degree, and long format (e.g., in SPSS). Most Mixed Model tutorials that I find address between factors and repeated measurments. ...
0
votes
0answers
20 views

What statistical tests to run given the design?

I have 3 research questions. 1) Does increased hyperlink insularity cause better user understanding? 2) Does increased hyperlink insularity cause better user perceived security? 3) Does increased ...
2
votes
0answers
20 views

Obtaining the Standard Error of Weighted Data in SPSS

I'm trying to find confidence intervals for the means of various variables in a database using SPSS, and I've run into a spot of trouble. The data is weighted, because each of the people who was ...
1
vote
1answer
109 views

Interaction/Moderation effect in ANOVA - variable is not one of the factors

I am running an univariate ANOVA in SPSS to test my hypotheses for my 3x2 between subjects design experiment. The factors for the ANOVA are review valence (3 levels) and presence of brand (2 levels). ...
0
votes
1answer
23 views

SPSS: Determining the direction

Background: Group A the control group uses a website 1. Group B the treatment group uses website B. The expected result is that Group B will have a higher understanding than group A. Hypothesis: The ...
0
votes
0answers
10 views

Is use of reliability analysis always necessary in data handling?

My study involves studying the seasonal variations (premonsoon, monsoon, postmonsoon) in river at 5 different sampling points. The water quality study involved eight water parameters. To check the ...
0
votes
1answer
55 views

Convert an interval variable to ordinal in SPSS

I am currently conducting a study on reverse mortgages for my master thesis, and I'd like to convert one interval variable into ordinal in order to run a ordinal probit regression analysis. My ...
1
vote
2answers
64 views

Segmentation using cluster analysis in SPSS

I am doing a segmentation project and am struggling with cluster analysis in spss right now. Could you please help me get this answered: How do I determine the quality of the clustering in spss? In ...
3
votes
0answers
30 views

Interpret the pairwise comparison plot from SPSS

For my user study, I am trying to find out to what extent people prefer to move by foot. They had the option to rank their preference for 'walking', 'jogging' and 'running' for a several amount of ...
2
votes
1answer
34 views

SPSS CHAID/CRT Query

Hello I am using SPSS trees - CART functionality for classification. I have a number of classifying variables such as Business_Size, Location, Previous_Record etc. I want to know how do I set ...
2
votes
0answers
70 views

Contingency tables, Chi-Squared analysis and next steps in R

I'm hoping one of the more experienced R programmers/statisticians out there can help me with something, or explain why what I'm trying to do is stupid :-) In the past, I've done analysis of survey ...
1
vote
0answers
24 views

How to create item parcels for a factor that is not unidimensional?

This is follow-up question by "How to create item parcels in SPSS Amos?" My question is how to create item parcels for a factor that is not a unidimensional. Several articles have mentioned that ...
0
votes
0answers
25 views

SPSS Date Correlation

I have 2 sets of data: one is a list of all days in 2012 in date format (DatesA); the other is a list of dates in 2012 on which certain events occurred (...
1
vote
1answer
34 views

2x2 ANOVA interactions

I'm doing a masters project where I look for effects of font (fluent, disfluent) on two populations' (control, dyslexic) reading comprehension. SPSS only gives me a significant main effect for ...
1
vote
0answers
41 views

Repeated Measures ANOVA pairing counterbalance issue

I have been conducting all of my analyses on one DV (Quality) using a repeated measures ANOVA, with two variable (Time and Gender) at two levels each. However, it occurred to me today, that this might ...
0
votes
0answers
23 views

Syntax for means and standard deviation on repeated measures GLM in spss?

This may be a silly question, but when running a repeated measure GLM in SPSS, and entering syntax for means tables (/EMMEANS), is there any way to get that table to show not just the standard error, ...
0
votes
0answers
70 views

graphing interactions' SD above and below the mean

I am fairly new in using SPSS (I'm a freshman in a university) and would like to further test my interactions. I read the Aiken and West procedure for testing interactions, one that graphs the ...
0
votes
1answer
29 views

Contradictive results of correlation and intergroup comparisons

I got strange results in spss and I don't know how to explain them statistically. I made correlations between: 1) personality and emotional inteligence (EI) 2) personality and emotional competence ...
0
votes
1answer
86 views

Dummy variables in linear regression

I used SPSS to create dummy variables for three different shops. Shop 1 was coded 0, shop 2 was coded 1 and shop 3 was coded 2. In my output I see that the slope coefficients (B) for shop 2 and 3 are ...
1
vote
1answer
61 views

optimal scaling / CATREG for imputed data

I have a data set with 5 different kinds of nutrient statuses and I want to see whether they are associated with categorical / ordinal grades at school. I have multiple covariates which I will ...
0
votes
1answer
64 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 ...
3
votes
1answer
102 views

Plotting results with many features

I need an advice for plotting my results. I got different classification results by including different features and different k values. So, I got different results for each of them: My features: ...
1
vote
1answer
45 views

Need help for which test to choose?

I am studying on cognition and behaviors. I am lecturing linguistic courses and teaching linguistic terminology with visuals. In my research, just before each course, I asked participants 20 ...
3
votes
2answers
101 views

How to approach missing data…ignore or not to ignore?

What would be the best option when you come across missing data. Do you exclude that person completely from the data analysis or not. If not then how do you go about it? i have data on two groups at ...
2
votes
2answers
68 views

What test should I perform on a structural equation model?

This model is a replication of an earlier study. After factor analysis in SPSS, I need to test my hypothesis (as you can see there are 7) all should give significant positive relation with each ...
0
votes
1answer
31 views

Grouping cases on certain criterion

You experts have been helpful so many times that I read others' threads, but this time I have to ask a new question. Long story short I need to group all my cases into 4 categories. Could someone ...
1
vote
1answer
52 views

Should I analyze variables separately or together?

I have one categorical variable (on a diet: yes or no) and two numerical variables (patients heart rate and ...
0
votes
0answers
21 views

Two Groups Time 1 and Time 2 Nonparametric

I want to look a the effect of an intervention on work satisfaction and motivation. The data not normally distributed. I have two groups, intervention and control, with 11 in each group. I measure ...
1
vote
2answers
129 views

Confidence interval for the intercept in logistic regression

Some major commercial statistical packages (e.g., SPSS) do not report a CI for the intercept term in logistic regression. [Based on answer below R does provide CI for intercept] Why might confidence ...
1
vote
1answer
76 views

Finding groups of similar people

After asking 16 questions (yes or no) to 75 people I have a table of their answers coded like 00110011110101010 ('0'=no and '1'=yes). Now I would like to find ...
2
votes
2answers
67 views

Logistic regression with an independent variable that only applies to a subset

I'm trying to perform a logistic regression with the dependent variable being whether a potential customer who attended an event purchased or did not purchase. A subset of potential customers at the ...
0
votes
0answers
50 views

Factor analysis using spss

I got determinant value– 5.84E-007. What does it mean? Should I continue the work or not? What do I have to do? And also I obtain the following Kaiser-Meyer-Olkin value and Bartlett's Test results ...
0
votes
0answers
53 views

Running a Pearson's correlation calculation on binary survey data

I have the following raw survey data output from a survey app: I was asked to run a Pearson's R on the results (1s and 0s). The format that is returned is as follows: I was further ...
1
vote
1answer
51 views

Book on interpreting plots in regression analysis

I am taking a regression course that is mainly theoretical. But we are given scatter plots and residual plots, and we are supposed to be able to describe the relationships and interpret them. I find ...
0
votes
0answers
39 views

Repeated Measures ANOVA or mixed model? And with massive group differences?

I need some guidance on which statistical test to use: I want to know if the nature of frog calls changes depending on the time of day. I observed 4 species of frogs at the same 3 times for several ...
0
votes
0answers
48 views

What's a good Nagelkerke value?

My model has Nagelkerke $R^2 = 0.282$ as outputted by SPSS. Having read some literature, it claims that this should be counted as a good value. However, since the maximum value is 1, this means that ...