1
vote
3answers
226 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 ...
2
votes
1answer
32 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 ...
4
votes
1answer
64 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 ...
-1
votes
0answers
42 views

Multiple regression between ordinal variables [duplicate]

Can I carry out regression between 3 independent ordinal variables (Feelings from an ad; Judgement of an ad; ...
0
votes
0answers
10 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 ...
1
vote
0answers
37 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 ...
0
votes
1answer
88 views

How can I compare regression coefficients in the same multiple regression model

I think this question has been answered in bits and pieces here and there, but I am still a bit unsure about what the best approach for this is: how to compare two coefficients from a multiple linear ...
1
vote
1answer
25 views

Questionaire analysis and grouping responses

I want to know if the creative process engagement is related to creativity. I don't know how to analyze the questionnaire. I will be collecting data for cpe with Zhang and Bartal's (2010) 11-item ...
0
votes
1answer
42 views

Best way to estimate a regression with reaction times

I have reactions times in a no-normal distribution, so I am using logarithms. Which can be the best way to estimate a regression? Later, I would like to plot the results according to the age of my ...
1
vote
0answers
34 views

Running standardized/unstandardized regression equation on SPSS

I am working on a regression assignment using SPSS. I have raw, centered, and z scores for the data. I already regressed the DV and IV and see the unstandardized and standardized coefficients under ...
0
votes
1answer
60 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 ...
0
votes
1answer
255 views

Marketing Mix Modeling for sales data

I have data for 4 years with variables year, month and sales volume only. I want to find the base volume and incremental volume. I want to use Marketing Mix Modeling. Can anybody tell how to define ...
0
votes
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 ...
0
votes
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 ...
-1
votes
1answer
323 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 ...
1
vote
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 ...
1
vote
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 ...
1
vote
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 ...
4
votes
3answers
154 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 ...
0
votes
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?
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
192 views

What to do when linearity is violated in a linear regression analysis SPSS

I am currently trying to undertake a linear regression analysis in SPSS and I have come across some difficulties. My data does not show linearity and therefore is violated. I have transformed both ...
1
vote
1answer
51 views

How do I check for covariates and how do I adjust for them?

My data: My outcome variable (Outvar) is binary (yes/no) My explanatory variable (exvar) is also binary (yes/no) I have 3 extra variables: Variable A is binary Variable B is continuous but not ...
0
votes
0answers
40 views

Advanced regression in SPSS

I have data of several school classes (with several pupils). I want to calculate expected/predicted values of class A for some items using a regression (a multiple linear regression in that special ...
3
votes
2answers
386 views

Is it possible to conduct a regression if all variables are ordinal?

I would like to produce a regression analysis model. I have ordinal categorical data. I can use SPSS. I do not know what analysis to perform or what assumptions to check. What are the statistical ...
1
vote
1answer
36 views

Compare mean effect of one predictor based on another predictor

I would like to compare the effect of one IV ("sensation seeking") on a DV ("intended infidelity") based on another IV ("gender"). Actually I really just want to compare the means. So I would like to ...
0
votes
0answers
217 views

How to deal with a non-significant threshold value in ordinal regression in SPSS?

I am running an ordinal regression in SPSS. I have independent variables on nominal and ordinal scales. My dependent variable is ordinal, indicating a level of action, coded 0, 1, 2. Unfortunately, I ...
1
vote
1answer
555 views

Multiple variable comparison line graph SPSS

I have 6 variables, three of which are median splits and three of which are continuous measures of 'such and such', each of which is measured on the same 5 point scale. I am trying to produce a graph ...
0
votes
0answers
91 views

How to fit a multiple regression model that takes into account 50 days of each individual's history

I am using simple linear regression to predict the number of days of school a single student might miss after 250 days using their cumulative daily attendance data over the first 50 days of the ...
0
votes
1answer
154 views

Compare the slopes and intercepts between 2 variables in SPSS

There are 4 groups, each one having two 2 variables, X and Y. I am trying to understand the regression between them. For X variable I have 2 categories, positive and negative. I am not understanding ...
2
votes
1answer
95 views

Adding variables to the model one by one, or at the same time

What are the benefits of adding the variables into a model one by one, as compared to adding them all at the same time? As I see in most research, the first model that is tested is consisted of all ...
1
vote
1answer
177 views

Comparing two slopes

I have a dataset structured as follows: ...
0
votes
0answers
83 views

Goodness of fit vs. significance

If you had two models - one with a better fit, and one with predictors of higher significance - which one would you choose? Keep in mind that both models are considered a good fit. One has a 3% ...
1
vote
1answer
987 views

Covariate vs. factors

I have a survey problem where the dependent variable (ordinal) is in Likert-type scale (i.e. 1 to 5 from most satisfied to most dissatisfied) and two sets of independent variables. One set has 7 IVs ...
1
vote
1answer
216 views

Why do Minitab and SPSS give opposite results in Ordinal Logistic Regression?

I run an ordinal logistic regression model using both SPSS and Minitab. The dataset is exactly the same. The results are exactly the same, but in opposite directions. I have not manipulated default ...
2
votes
1answer
250 views

Visualizing an interaction effect of a Logistic Regression Analysis (in SPSS)

What would be the best way to go about visualizing an interaction effect of a Logistic Regression Analysis (preferably using SPSS)? There is a significant interaction between one interval (HDI) and ...
1
vote
1answer
86 views

Which statistical method should I use?

I wish to analyse the following : Independent Variable (IV): User of online financial reports Perceived usefulness and Perceived Quality (Sub to Relevance, Reliability, Understandability, ...
0
votes
0answers
93 views

Formula for computing variable from Likert-type scale

I have this model: $$4F + 4.8N = a + bM +cP + dH$$ where $F$, $N$, $M$, $P$, $H$ are variables measured on a 7-point Likert's type scale and $b, c, d$, are coefficients and $a$ is a constant. I am ...
0
votes
1answer
1k views

Why does SPSS throw out variables in OLS (and how can I prevent this from happening)?

My dataset consists of 4,000 companies from 24 countries. Each company has certain features, the IV's. Consider the variable list below: green is the DV, red the IV's and blue are dummies (one for ...
0
votes
0answers
32 views

Impact of some dimensions of one construct on the another construct in a 2-construct model

I have made a model consisting of two constructs, say parents and children, each with several dimensions and set of items (variables). I have used a mixture of Exploratory Factor Analysis (EFA) and ...
2
votes
0answers
89 views

Test regression parameter against a constant in SPSS

This is a pretty basic question, but I can't find an answer by searching for different statements of the same problem. Is there a straightforward way to test if a regression parameter is different ...
0
votes
1answer
103 views

spss: working with two binary/dummy variables

Am trying to set a few binary/dummy variables against each other, i.e. propensity_to_dance and gender. I assume that it' ok to ...
0
votes
0answers
21 views

spss 20 for mac: how to get probabilities after running a binary logistic regression [duplicate]

I have a binary variable that I'm investigating in SPSS, inclination_to_dance. I have another linear variable as well, ...
5
votes
4answers
947 views

What regression analysis should I perform on my data and why?

I am a law student researching which factors influence the CSR (corporate social responsibility, GSE_RAW) behavior of companies. As my studies didn't offer any ...
0
votes
0answers
102 views

How do I perform a Mixed model analysis on my data in SPSS?

In my thesis I'm trying to discover which factors influence the CSR (corporate social responsibility, GSE_RAW) behavior of companies. Two groups of possible factors ...
2
votes
1answer
447 views

Why do coefficients and significance levels change so much in my OLS? Do I need MIXED model instead?

Please consider the following OLS model: As a rule of thumb, a VIF score of max. 5 is considered acceptable collinearity in most fields. So for the better part I believed this model to be quite ...
0
votes
3answers
863 views

How to report SPSS OLS output?

Consider the model below: In many research papers, significance of statistical results are indicated by *, **, and ...
0
votes
0answers
23 views

Output of logistic regression model [duplicate]

I have built a logistic regression model using SPSS to predict a variable (0 or 1) The coefficients are as below: -0.005, 0.132, 1.349, -1.321,-0.265,-0.981, intercept = -1.522 when I sub in the ...
0
votes
1answer
95 views

Standardizing standardized data?

Let's assume I standardize my data in SPSS through converting them to z-values. Then I save my dataset and load it into AMOS to do some regressions. Now, the data is already standardized, but AMOS ...
0
votes
3answers
232 views

Best method to analyse whole population data

I have data of an entire population (N=27). I would like to find out which variables (of many) have the greatest effect on one certain dependent variable, and how much of its variance can they ...