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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. 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: 717
    05-06-2016, 04:19 AM Go to last post
  2. 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: 790
    05-05-2016, 11:12 PM Go to last post
  3. 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: 782
    05-05-2016, 02:23 PM Go to last post
  4. 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: 1,928
    05-04-2016, 11:21 PM Go to last post
  5. 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: 1,154
    05-04-2016, 06:39 PM Go to last post
  6. 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: 1,364
    05-04-2016, 02:19 AM Go to last post
  7. 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: 1,393
    05-04-2016, 02:01 AM Go to last post
  8. 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: 712
    05-03-2016, 01:11 PM Go to last post
  9. 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: 703
    05-03-2016, 10:16 AM Go to last post
  10. 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: 1,257
    05-02-2016, 10:01 PM Go to last post
  11. 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: 766
    05-02-2016, 02:54 PM Go to last post
  12. 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: 1,142
    05-02-2016, 09:45 AM Go to last post
  13. 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: 665
    05-02-2016, 08:49 AM Go to last post
  14. 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: 2,596
    05-01-2016, 09:39 PM Go to last post
  15. 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: 1,285
    05-01-2016, 08:38 PM Go to last post
  16. 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: 662
    05-01-2016, 05:50 AM Go to last post
  17. 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: 751
    04-30-2016, 02:22 PM Go to last post
  18. 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: 797
    04-29-2016, 05:25 PM Go to last post
  19. 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: 887
    04-28-2016, 09:08 AM Go to last post
  20. 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: 549
    04-28-2016, 07:07 AM Go to last post
  21. 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: 528
    04-28-2016, 04:29 AM Go to last post
  22. 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: 1,006
    04-27-2016, 12:59 PM Go to last post
  23. 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: 1,002
    04-27-2016, 05:16 AM Go to last post
  24. 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: 828
    04-27-2016, 03:39 AM Go to last post
  25. 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: 1,175
    04-26-2016, 03:59 PM Go to last post
  26. 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: 1,084
    04-26-2016, 06:23 AM Go to last post
  27. 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: 629
    04-26-2016, 01:34 AM Go to last post
  28. 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: 744
    04-25-2016, 09:33 PM Go to last post
  29. 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: 1,554
    04-24-2016, 09:57 PM Go to last post
  30. 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: 571
    04-24-2016, 09:48 PM Go to last post
  31. 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: 1,102
    04-24-2016, 07:39 PM Go to last post
  32. 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: 838
    04-21-2016, 04:36 AM Go to last post
  33. 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: 2,192
    04-20-2016, 04:11 PM Go to last post
  34. 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: 616
    04-20-2016, 12:49 PM Go to last post
  35. 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: 744
    04-19-2016, 03:17 PM Go to last post
  36. 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: 521
    04-19-2016, 11:25 AM Go to last post
  37. 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: 12,666
    04-19-2016, 10:59 AM Go to last post
  38. 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: 1,166
    04-18-2016, 05:32 PM Go to last post
  39. 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: 677
    04-16-2016, 06:35 PM Go to last post
  40. 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: 851
    04-16-2016, 10:47 AM Go to last post
  41. 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: 907
    04-15-2016, 02:12 PM Go to last post
  42. 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: 1,536
    04-15-2016, 04:39 AM Go to last post
  43. 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: 1,781
    04-14-2016, 09:02 AM Go to last post
  44. 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: 732
    04-13-2016, 03:55 PM Go to last post
  45. 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: 756
    04-13-2016, 07:08 AM Go to last post
  46. 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: 782
    04-12-2016, 05:30 PM Go to last post
  47. 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: 1,067
    04-11-2016, 08:54 PM Go to last post
  48. Is this a sensible approach for a 3x3 factorial experiment?

    Hi all I'm hoping that someone can let me know whether this is a suitable approach for analysing a dataset. I have a 3x3 factorial design, so 2...

    Started by t.jones‎, 04-08-2016 04:07 AM
    • Replies: 0
    • Views: 1,190
    04-08-2016, 04:07 AM Go to last post
  49. Effect Size in Poisson Reg with a Binary Predictor

    Well, I don't regularly come across count variables as dependent variables. What is the best effect size to report for a Poisson reg model with a...

    Started by hlsmith‎, 04-07-2016 11:12 AM
    • Replies: 2
    • Views: 1,038
    04-07-2016, 01:26 PM Go to last post
  50. Help with a simple linear regression with a huge backlog of data

    Hi there. I am trying to run a regression that will help me predict Y from X. While this is pretty simple and I have done it already, I have many...

    Started by karan13‎, 04-06-2016 10:09 AM
    • Replies: 1
    • Views: 569
    04-07-2016, 07:16 AM Go to last post
  51. Compare coefficients of two regression models

    Hi, I have a little problem I hope someone can help me with. I run 2 multiple regression models with the same independent variables but...

    Started by Swag1992‎, 04-07-2016 04:15 AM
    • Replies: 1
    • Views: 563
    04-07-2016, 07:10 AM Go to last post
  52. low frequency independent variable in logistic regression

    I'm running a logistic regression and I think there's a variable that I'm not treating properly. I'm modeling traffic accidents (1) vs. no...

    Started by kai_squared‎, 04-05-2016 01:45 PM
    • Replies: 6
    • Views: 1,171
    04-06-2016, 07:06 AM Go to last post
  53. Confused about my Logistic Regression output (SPSS)

    Hi Guys, I've conducted a binary logistic regression using 2 categorical predictors (Static-moving and moving-static) and an outcome variable...

    Started by daveholja‎, 04-05-2016 08:12 AM
    • Replies: 4
    • Views: 856
    04-06-2016, 04:44 AM Go to last post
  54. Information Criterion to compare different linear models

    Dear Community, In order to perform a price forecast, I built four linear models:1-3 have one independent variable, 4 has two independent...

    Started by AntonR‎, 03-30-2016 08:38 AM
    • Replies: 1
    • Views: 718
    04-05-2016, 07:25 AM Go to last post
  55. Multiple Linear Regression Delta R Squared.

    I am conducting a multiple linear regression looking at the predictors of gender and the traits of the dark triad (Narcissism, Psychopathy, and...

    Started by kit191‎, 04-04-2016 08:14 AM
    • Replies: 0
    • Views: 1,610
    04-04-2016, 08:14 AM Go to last post
  56. coefficient variance decomposition test for multicollinearity

    good day, please assist me in interpreting the results of the coefficient variance decomposition test. i am a bit confused; i think the condition...

    Started by Boi‎, 04-03-2016 01:16 PM
    • Replies: 0
    • Views: 2,010
    04-03-2016, 01:16 PM Go to last post
  57. Log-Linear

    Hi all, I have a sample data of Mortality vs GDP. I need to make a Log-linear regression analysis. I transformed the data to log scale and then...

    Started by petros20‎, 04-03-2016 07:08 AM
    log-linear
    • Replies: 0
    • Views: 571
    04-03-2016, 07:08 AM Go to last post
  58. Question Multiple Regression

    I'm supposed to analyze data to see if an implementation fee was followed by a change in passenger volumes over a 4 year period. I've started to...

    Started by Avens10‎, 04-02-2016 11:41 AM
    • Replies: 0
    • Views: 1,163
    04-02-2016, 11:41 AM Go to last post
  59. Robust regression, bootstrapping and indirect effect

    Hi there, I am currently learning to do mediation analysis using bias-corrected accelerated bootstrap confidence intervals, similar to the...

    Started by Tux‎, 04-01-2016 12:26 PM
    • Replies: 4
    • Views: 1,066
    04-01-2016, 07:55 PM Go to last post
  60. Lightbulb SOS: Linear Regression

    Hi guys, it's a first time I am doing regressions for my dissertation and really need your help. I haven't been studying econometrics before, so I ...

    Started by teo_megre‎, 04-01-2016 07:10 AM
    • Replies: 0
    • Views: 798
    04-01-2016, 07:10 AM Go to last post

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