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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Question dummy regression - unequal sample sizes

    Hello, I am conducting a linear regression analysis in SPSS with different variables: - scale, - 2-level nominal, - 5-level nominal (dummy)...

    Started by Pernelle‎, 05-15-2016 09:50 AM
    dummy, regression, unequal sample size
    • Replies: 0
    • Views: 879
    05-15-2016, 09:50 AM Go to last post
  2. Time series

    Say you know that you have autocorrelation in your data. Say AR =2. Can you use ARIMA to remove the AC, then predict the results of the ARIMA with...

    Started by noetsi‎, 05-14-2016 02:06 PM
    • Replies: 1
    • Views: 927
    05-15-2016, 08:58 AM Go to last post
  3. Two way repeated measures with zeros, non integer values, and non-normal distribution

    I would really appreciate some help with a few models I am trying to run. Essentially my data looks at how often a subject was visited depending on...

    Started by choppedpete‎, 05-12-2016 05:48 AM
    glmer, lme4, lmer, repeated measures
    • Replies: 1
    • Views: 913
    05-12-2016, 01:48 PM Go to last post
  4. coding - one categorical vs multiple dummy

    Hi, Most things I read seem to suggest that when you have a categorical predictor in a regression analysis you should create k-1 dummy variables,...

    Started by pgseye‎, 05-09-2016 06:40 PM
    • Replies: 2
    • Views: 1,006
    05-10-2016, 03:57 PM Go to last post
  5. dummy regression with polytomous variable

    Hello, I want to perform a linear regression analysis. My DV is continuous (score between 0 and 6), and my predictors are: - one dichotomous...

    Started by Pernelle‎, 05-05-2016 03:03 PM
    • Replies: 1
    • Views: 1,020
    05-10-2016, 02:35 PM Go to last post
  6. Interaction concept put into plain English

    Hello, as you may know, I am not a statistician, rather a 'consumer' of statistics. When I study something new, or when I present statistics to a...

    Started by gianmarco‎, 05-10-2016 12:47 AM
    • Replies: 2
    • Views: 782
    05-10-2016, 07:42 AM Go to last post
  7. Examining interaction in an exponential (Poisson) model with standard and robust SE's

    Hello dear forum members! For the purpose of my study I am using an exponential Poisson model with fixed-effects specification. In simple: y =...

    Started by kiton‎, 05-09-2016 10:33 AM
    • Replies: 3
    • Views: 1,401
    05-09-2016, 03:59 PM Go to last post
  8. Model fit statistic for population-average specification

    Hello everybody! For the purpose of my study I am using an exponential Poisson model with population-averaged (PA) effects, as implemented in...

    Started by kiton‎, 05-09-2016 09:44 AM
    fit statistics, log likelihood, poisson
    • Replies: 0
    • Views: 853
    05-09-2016, 09:44 AM Go to last post
  9. Using Bonferonni in Multiple Regression

    Hi all, I'm currently working on a data-set involving several continuous independent variables and i'm wondering how the Bonferonni correction can...

    Started by benjamine85‎, 05-09-2016 02:56 AM
    • Replies: 1
    • Views: 671
    05-09-2016, 05:37 AM Go to last post
  10. Multiple regression analysis - Linearity/homoscedasticity

    Hello, I am currently having trouble determining if my predictors show enough linearity to be used in a standard multiple regression analysis, and...

    Started by pussel81‎, 04-27-2016 10:09 AM
    homoscedasticity, linearity, multiple regression
    • Replies: 2
    • Views: 1,263
    05-08-2016, 08:21 PM Go to last post
  11. Help for simple regression

    My research question is: "Can we say that the number of hours of Internet use increases with Internet purchase?" with the variables: - Use of...

    Started by chamarique‎, 05-07-2016 10:57 AM
    independent variable, regression
    • Replies: 3
    • Views: 1,194
    05-08-2016, 06:34 PM Go to last post
  12. Imputing Missing Values using Regression

    I have a table of 4 variables where some of the data is missing and I need to impute the missing values, my table is as follows: X1 X2 X3...

    Started by Mid‎, 05-06-2016 03:24 PM
    imputation, regression, study
    • Replies: 3
    • Views: 1,259
    05-06-2016, 05:21 PM Go to last post
  13. Exclamation Significant two-way interaction, but simple slopes are n.s.

    Hi everyone, I've seen similar questions like mine posted here before, but none of the replies were ever clear enough, so here's my Q. Thanks in...

    Started by tophbeifong‎, 05-06-2016 10:20 AM
    • Replies: 1
    • Views: 684
    05-06-2016, 12:10 PM Go to last post
  14. How to select the Independent Variables for modelling given 100 variable??

    Let's say i have selected my DV and i have 100 variables from which i have to choose my IDVs for the regression model(say multiple regression). ...

    Started by vikash_124124‎, 05-06-2016 04:19 AM
    • Replies: 0
    • Views: 813
    05-06-2016, 04:19 AM Go to last post
  15. Multiparameter fittting - confidence intervals criterion

    I made a multiparameter fittting (7 adjustment parameters, 45 experimental points). I obtained enormous confidence intervals for 95%. There is a...

    Started by James27‎, 05-05-2016 11:12 PM
    • Replies: 0
    • Views: 894
    05-05-2016, 11:12 PM Go to last post
  16. Exclamation Please anyone help due monday

    Hey guys, Im doing a mathematics degree and have this stats subject and honestly have no clue whatsoever on how to do anything in this class. I have...

    Started by disdat11‎, 05-04-2016 10:13 AM
    • Replies: 2
    • Views: 913
    05-05-2016, 02:23 PM Go to last post
  17. normality assumption: data itself, or residuals ?

    I have a question about the normality assumption, in regression, ANOVA, and T-test: The normalization assumption is for the original data and...

    Started by fengyuwuzu‎, 05-03-2016 10:36 PM
    • Replies: 3
    • Views: 2,015
    05-04-2016, 11:21 PM Go to last post
  18. Stepwise Regression Limitations Explanation

    I've recently been working on building a model and have come across a number of different approaches. I'm particularly interested in the limitations...

    Started by Phishypenguin‎, 05-03-2016 04:34 AM
    pvalues, regression, stepwise
    • Replies: 12
    • Views: 1,255
    05-04-2016, 06:39 PM Go to last post
  19. Do I have a non-linear regression?

    Hello everyone, I want to start by saying that I don't have too much experience working with continuous dependent variables. I have worked more...

    Started by Marvin85‎, 02-26-2016 03:22 PM
    non-linear regression, predict, predicted y terms
    • Replies: 5
    • Views: 1,466
    05-04-2016, 02:19 AM Go to last post
  20. Quick Mediation Analysis Question

    Hi Everyone, I have a quick question about interpreting a mediation analysis from Hayes' PROCESS macro. After running a mediation analysis, I...

    Started by jricci‎, 04-08-2016 07:03 PM
    mediation, mediation analysis
    • Replies: 2
    • Views: 1,516
    05-04-2016, 02:01 AM Go to last post
  21. Index & Dummies - Italian Mafia

    Hey. i am working on a paper about the mafia in italy. my equation: Y=beta0 + beta1*MPI + beta2*Controls Y = Response Rate in a given city...

    Started by hurri‎, 05-03-2016 01:11 PM
    • Replies: 0
    • Views: 802
    05-03-2016, 01:11 PM Go to last post
  22. Interpreting Odds Ratio after Weight of evidence transformation

    I am doing a logistic modeling with several continuous variables and binary outcome variable. 1- event 0-non event. I did the initial modeling with...

    Started by bssekar‎, 05-02-2016 08:30 PM
    logistic regression, odds ratio, weight of evidence
    • Replies: 2
    • Views: 829
    05-03-2016, 10:16 AM Go to last post
  23. Combining Two Samples (one w/ intervention and one w/ out intervention)

    I have a local dataset with a continuous predictor and binary outcome. I will use logistic regression to predict the binary outcome with the...

    Started by hlsmith‎, 05-02-2016 03:50 PM
    • Replies: 7
    • Views: 1,397
    05-02-2016, 10:01 PM Go to last post
  24. testing seemingly unrelated regressions assumptions in R

    Hi there! I have a fitted SUR model and want to test if the assumptions for SUR (not the ordinary linear assumptions, since i've already checke...

    Started by JagarSUR‎, 05-02-2016 01:00 PM
    • Replies: 1
    • Views: 834
    05-02-2016, 02:54 PM Go to last post
  25. Cox Regression - time dependent

    Dear all, I have a question regarding the cox regression. I have conducted a dataset with Top50 Boxoffice Data for the U.S market. It contains...

    Started by martinki‎, 05-02-2016 07:25 AM
    • Replies: 3
    • Views: 1,332
    05-02-2016, 09:45 AM Go to last post
  26. Types of regression: Article

    Well a page, but I was not sure what to call this :p By no means complete or even close but interesting. There are hundreds of types of...

    Started by noetsi‎, 05-02-2016 08:49 AM
    • Replies: 0
    • Views: 753
    05-02-2016, 08:49 AM Go to last post
  27. Fill in multiple missing values given correlation matrix

    I have a correlation matrix: mat <- round(cor(mtcars), 2) mpg cyl disp hp drat wt qsec vs am gear carb mpg 1.00...

    Started by trinker‎, 04-26-2016 09:51 AM
    2 Pages
    1 2
    • Replies: 16
    • Views: 2,987
    05-01-2016, 09:39 PM Go to last post
  28. Post Linear Regression Interpretation

    Hi there, I am running a Multiple Linear Regression analysis. I have 2 predictor variables (self-worth and self-acceptance) and 1 criterion...

    Started by vanessak93‎, 05-01-2016 08:21 PM
    interpretation, linear regression, multiple regression, psychology statistics, regression
    • Replies: 4
    • Views: 1,436
    05-01-2016, 08:38 PM Go to last post
  29. Multinomial logit / time-series fixed effects / multivariate regression: Which one?

    As part of a larger study, we have collected a wealth of data on the interactions customers engage in when buying and using a service. ...

    Started by Niklas B.‎, 05-01-2016 05:50 AM
    multinomial logit, multivariate regression, time-series fixed effects
    • Replies: 0
    • Views: 754
    05-01-2016, 05:50 AM Go to last post
  30. Logistic reg w/ ratio as predictor

    Is there anything I need to know when using a ratio as an independent variable in the model. Is it better to use log(ratio) ? Not an easy web...

    Started by hlsmith‎, 04-30-2016 01:34 PM
    • Replies: 1
    • Views: 846
    04-30-2016, 02:22 PM Go to last post
  31. Question [Logistic Analysis] How does SPSS calculate the 0.5 Cut-Point?

    I am interested in determining the classification accuracy of an outcome (binary DV - whether a participant has capacity or not to make a legal...

    Started by szuscak‎, 04-29-2016 05:25 PM
    cut-point, logistic regression
    • Replies: 0
    • Views: 883
    04-29-2016, 05:25 PM Go to last post
  32. Multivariate analysis, canonical correlation

    Hello, I conducted an experiment with 18 subjects who participated in a simulator experiment. Each participant had to perform a task with 6...

    Started by aapje123‎, 04-28-2016 09:08 AM
    • Replies: 0
    • Views: 975
    04-28-2016, 09:08 AM Go to last post
  33. Thumbs down Interpretation of coefficients, dependent variable in (%), independent variable in ln

    Hi, I have a very simple question. I have the following equation. My dependent variable is CRES which is the share of renewables in a country's...

    Started by Rex‎, 04-28-2016 07:07 AM
    dependent var, independent variable, log linear, regression coefficent
    • Replies: 0
    • Views: 596
    04-28-2016, 07:07 AM Go to last post
  34. Problem with replicating a paper

    I'm having some trouble at replicating this paper (text here: http://www.michiganjb.org/issues/52/text52c.pdf) The paper wants to assess the economic...

    Started by Luc.a‎, 04-28-2016 04:29 AM
    • Replies: 0
    • Views: 595
    04-28-2016, 04:29 AM Go to last post
  35. Writing down firth logistic regression equation

    Hi, This is a really simple question that I'm sort of embarrassed I can't answer - how would you write down a firth logistic regression? Now to...

    Started by Wendero‎, 04-25-2016 10:01 PM
    • Replies: 6
    • Views: 1,208
    04-27-2016, 12:59 PM Go to last post
  36. GLS (Generalized least Squares) STATA

    generalized least squares (GLS) is a technique for estimating the unknown parameters in a linear regression model. GLS (Generalized least Squares)...

    Started by OlhDt_semarang‎, 04-27-2016 05:16 AM
    • Replies: 0
    • Views: 1,280
    04-27-2016, 05:16 AM Go to last post
  37. Regression with stratified data: What to do?

    Hi, I want to model a bird population in a country via regression analysis (Poisson regression due to count data). In order to optimize the...

    Started by mmercker‎, 04-27-2016 03:39 AM
    regression analysis, stratification, stratified sampling, weights
    • Replies: 0
    • Views: 948
    04-27-2016, 03:39 AM Go to last post
  38. Minimum number of cases for the reference level

    Before I ask this I have the true population so I am not sure this issue even applies :p Is there a minimum number of cases the reference level...

    Started by noetsi‎, 04-25-2016 01:22 PM
    • Replies: 7
    • Views: 1,278
    04-26-2016, 03:59 PM Go to last post
  39. Regression to compare mean differences?

    Hi everyone, I am doing a project with two different groups (clinical and control). I want to compare their scores on a couple of variables (ex:...

    Started by DefenceDoom‎, 04-25-2016 05:35 PM
    ancova, mean differences, regression
    • Replies: 1
    • Views: 1,202
    04-26-2016, 06:23 AM Go to last post
  40. Question Multiple, hierarchal regression - division of p-value?

    Hey everybody! I am pretty new to this forum and also to statistics. In these days I try to analyze the data for my Bachelor thesis. I study...

    Started by Mindfull‎, 04-26-2016 01:34 AM
    covariates, p-value, regression
    • Replies: 0
    • Views: 712
    04-26-2016, 01:34 AM Go to last post
  41. zero value of the regression parameter

    Hello. I would like to ask if anyone knows a website with the theme: regression testing parameter. I need only theory on the topic (to school). Just...

    Started by Dominik556‎, 04-25-2016 09:51 AM
    • Replies: 5
    • Views: 855
    04-25-2016, 09:33 PM Go to last post
  42. Cochrane Orcutt Eviews 9

    Cochrane Orcutt estimation is a procedure in econometrics, which adjusts a linear model for serial correlation in the error term. It is named after...

    Started by OlhDt_semarang‎, 04-24-2016 09:57 PM
    • Replies: 0
    • Views: 1,991
    04-24-2016, 09:57 PM Go to last post
  43. Multiple Regression with Ratio as Independent Variable

    I am doing a multiple regression and want to use a ratio (number of support staff to number of students) as an independent variable. Does dividing...

    Started by CounselorHenry‎, 04-24-2016 09:48 PM
    independent variable, multiple regression, ratios
    • Replies: 0
    • Views: 668
    04-24-2016, 09:48 PM Go to last post
  44. Positive Pearson Correlation but negative coefficient

    Dear All I am trying to create a regression model for estimating electricity demand. The independent variables considered are population and GDP....

    Started by Ravita‎, 04-24-2016 07:39 PM
    • Replies: 0
    • Views: 1,189
    04-24-2016, 07:39 PM Go to last post
  45. Newbie in trouble (is regression the right way to go here?)

    Hi there! (background, skip if wanted) New member here. Finance student with an exciting area to write a paper about but I have not taken any...

    Started by FinanceBug‎, 04-21-2016 04:36 AM
    • Replies: 0
    • Views: 951
    04-21-2016, 04:36 AM Go to last post
  46. Likert Scale as dependent variable

    Hi all, I have a question regarding the analysis of my survey data. I have created one variable of seven likert scale variables after conducting...

    Started by StefanSprenger‎, 04-19-2016 04:07 PM
    • Replies: 9
    • Views: 2,419
    04-20-2016, 04:11 PM Go to last post
  47. Linear regression with all categorical variables SPSS

    Hello, I am running a multivariate regression analysis on the presence of an organism in an infection (dependent variable), and certain risk factors...

    Started by ssrx‎, 04-18-2016 07:32 PM
    • Replies: 4
    • Views: 679
    04-20-2016, 12:49 PM Go to last post
  48. Regression Misconceptions

    Dear all, Just wanted to clear some misconceptions I have about regression analysis. Your help would be highly appreciated :) 1) One of the...

    Started by majortom88‎, 04-19-2016 02:44 PM
    • Replies: 1
    • Views: 851
    04-19-2016, 03:17 PM Go to last post
  49. Question Factor scores as independent variables in multiple regression

    I'm checking that I have understood this right. Factor scores must be achieved via oblique rotation, because factor scores must be allowed to...

    Started by zxc‎, 04-19-2016 11:25 AM
    • Replies: 0
    • Views: 577
    04-19-2016, 11:25 AM Go to last post
  50. Question Graphically check linearity in logit regression

    Hi all, I am running a logit regression where the outcome variable is binary. I am interested in checking, graphically, whether the relationship...

    Started by Phaedrus‎, 07-21-2014 07:50 AM
    2 Pages
    1 2
    • Replies: 24
    • Views: 13,892
    04-19-2016, 10:59 AM Go to last post
  51. Can covariates be random variables? (logit)

    Hi Everyone. I have been discussing a project at work. My colleague said that he is going to estimate a logit model and include as a covariates...

    Started by harel‎, 04-17-2016 05:50 AM
    • Replies: 5
    • Views: 1,318
    04-18-2016, 05:32 PM Go to last post
  52. Confounder confounds at only one level of polytomous variable

    Hello! I have looked for a post on this but have been unsuccessful. It would be great if you could help. I am using logistic regression in SAS. ...

    Started by rkw‎, 04-16-2016 06:35 PM
    confounding, polychotomous, polytomous
    • Replies: 0
    • Views: 756
    04-16-2016, 06:35 PM Go to last post
  53. Question about dummy variables

    Hi Guys, So I am doing a project for a class, and had a question on how to interpret something on my SPSS. I am designing a multivariate regression...

    Started by patslee6‎, 04-16-2016 10:47 AM
    • Replies: 0
    • Views: 930
    04-16-2016, 10:47 AM Go to last post
  54. Using weights in regression

    I don't really understand this argument. I thought you had to use weights in regression always when you were not randomly sampling. But this argues...

    Started by noetsi‎, 04-15-2016 12:37 PM
    • Replies: 2
    • Views: 1,036
    04-15-2016, 02:12 PM Go to last post
  55. Is correction for attenuation in my regression analysis necessary?

    Hi everyone, I'd like to know if I should consider a correction for attenuation in a multiple regression I'd like to run on my data. Here's...

    Started by majortom88‎, 04-11-2016 01:53 PM
    • Replies: 7
    • Views: 1,699
    04-15-2016, 04:39 AM Go to last post
  56. Relative impact of predictors in linear regression

    I want to rank variables from most to least important, in terms of impact on the DV. My predictors are either interval or dummy. My DV is interval. I...

    Started by noetsi‎, 04-11-2016 11:08 AM
    • Replies: 8
    • Views: 1,980
    04-14-2016, 09:02 AM Go to last post
  57. Generating random estimates

    I have 5 years worth of actual monthly data. I want to "predict" (examine really) possible values 12 months into the future. I don't want to be...

    Started by fred3‎, 04-13-2016 03:55 PM
    • Replies: 0
    • Views: 804
    04-13-2016, 03:55 PM Go to last post
  58. Seemingly unrelated regression in R with many variables

    Hey! I'm sitting here with a data frame with over 100 variables and I'm supposed to model my 8 dependent variables with seemingly unrelated...

    Started by JagarSUR‎, 04-13-2016 07:08 AM
    • Replies: 0
    • Views: 852
    04-13-2016, 07:08 AM Go to last post
  59. A purely conceptual question

    Assume a logisitc regression model includes a continuous variable like age and a categorical variable like gender and an interaction term for these. ...

    Started by gmcbeen‎, 04-12-2016 05:30 PM
    • Replies: 0
    • Views: 846
    04-12-2016, 05:30 PM Go to last post
  60. Comparison of regression coefficients between (nested) geographic regions

    Hi All, I would like to compare the effect of an explanatory variable (say X1) on a response variable (Say Y) between two geographic regions in...

    Started by arun‎, 04-11-2016 08:54 PM
    comparison, regression, standardization
    • Replies: 0
    • Views: 1,189
    04-11-2016, 08:54 PM Go to last post

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