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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. 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 04:24 PM
    imputation, regression, study
    • Replies: 3
    • Views: 306
    05-06-2016, 06:21 PM Go to last post
  2. 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 11:20 AM
    • Replies: 1
    • Views: 295
    05-06-2016, 01:10 PM Go to last post
  3. 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 05:19 AM
    • Replies: 0
    • Views: 254
    05-06-2016, 05:19 AM Go to last post
  4. 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, 05-06-2016 12:12 AM
    • Replies: 0
    • Views: 274
    05-06-2016, 12:12 AM Go to last post
  5. 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 11:13 AM
    • Replies: 2
    • Views: 269
    05-05-2016, 03:23 PM Go to last post
  6. 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 11:36 PM
    • Replies: 3
    • Views: 1,426
    05-05-2016, 12:21 AM Go to last post
  7. 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 05:34 AM
    pvalues, regression, stepwise
    • Replies: 12
    • Views: 591
    05-04-2016, 07:39 PM Go to last post
  8. 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: 686
    05-04-2016, 03:19 AM Go to last post
  9. 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 08:03 PM
    mediation, mediation analysis
    • Replies: 2
    • Views: 653
    05-04-2016, 03:01 AM Go to last post
  10. 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 02:11 PM
    • Replies: 0
    • Views: 207
    05-03-2016, 02:11 PM Go to last post
  11. 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 09:30 PM
    logistic regression, odds ratio, weight of evidence
    • Replies: 2
    • Views: 246
    05-03-2016, 11:16 AM Go to last post
  12. 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 04:50 PM
    • Replies: 7
    • Views: 420
    05-02-2016, 11:01 PM Go to last post
  13. 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 02:00 PM
    • Replies: 1
    • Views: 293
    05-02-2016, 03:54 PM Go to last post
  14. 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 08:25 AM
    • Replies: 3
    • Views: 323
    05-02-2016, 10:45 AM Go to last post
  15. 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 09:49 AM
    • Replies: 0
    • Views: 221
    05-02-2016, 09:49 AM Go to last post
  16. 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 10:51 AM
    2 Pages
    1 2
    • Replies: 16
    • Views: 809
    05-01-2016, 10:39 PM Go to last post
  17. 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 09:21 PM
    interpretation, linear regression, multiple regression, psychology statistics, regression
    • Replies: 4
    • Views: 339
    05-01-2016, 09:38 PM Go to last post
  18. 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 06:50 AM
    multinomial logit, multivariate regression, time-series fixed effects
    • Replies: 0
    • Views: 245
    05-01-2016, 06:50 AM Go to last post
  19. 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 02:34 PM
    • Replies: 1
    • Views: 298
    04-30-2016, 03:22 PM Go to last post
  20. 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 06:25 PM
    cut-point, logistic regression
    • Replies: 0
    • Views: 262
    04-29-2016, 06:25 PM Go to last post
  21. 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 10:08 AM
    • Replies: 0
    • Views: 312
    04-28-2016, 10:08 AM Go to last post
  22. 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 08:07 AM
    dependent var, independent variable, log linear, regression coefficent
    • Replies: 0
    • Views: 253
    04-28-2016, 08:07 AM Go to last post
  23. 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 05:29 AM
    • Replies: 0
    • Views: 199
    04-28-2016, 05:29 AM Go to last post
  24. 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 11:01 PM
    • Replies: 6
    • Views: 364
    04-27-2016, 01:59 PM Go to last post
  25. 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 06:16 AM
    • Replies: 0
    • Views: 214
    04-27-2016, 06:16 AM Go to last post
  26. 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 04:39 AM
    regression analysis, stratification, stratified sampling, weights
    • Replies: 0
    • Views: 195
    04-27-2016, 04:39 AM Go to last post
  27. 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 02:22 PM
    • Replies: 7
    • Views: 435
    04-26-2016, 04:59 PM Go to last post
  28. 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 06:35 PM
    ancova, mean differences, regression
    • Replies: 1
    • Views: 286
    04-26-2016, 07:23 AM Go to last post
  29. 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 02:34 AM
    covariates, p-value, regression
    • Replies: 0
    • Views: 215
    04-26-2016, 02:34 AM Go to last post
  30. 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 10:51 AM
    • Replies: 5
    • Views: 347
    04-25-2016, 10:33 PM Go to last post
  31. 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 10:57 PM
    • Replies: 0
    • Views: 318
    04-24-2016, 10:57 PM Go to last post
  32. 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 10:48 PM
    independent variable, multiple regression, ratios
    • Replies: 0
    • Views: 221
    04-24-2016, 10:48 PM Go to last post
  33. 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 08:39 PM
    • Replies: 0
    • Views: 213
    04-24-2016, 08:39 PM Go to last post
  34. 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 05:36 AM
    • Replies: 0
    • Views: 410
    04-21-2016, 05:36 AM Go to last post
  35. 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 05:07 PM
    • Replies: 9
    • Views: 706
    04-20-2016, 05:11 PM Go to last post
  36. 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 08:32 PM
    • Replies: 4
    • Views: 384
    04-20-2016, 01:49 PM Go to last post
  37. 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 03:44 PM
    • Replies: 1
    • Views: 278
    04-19-2016, 04:17 PM Go to last post
  38. 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 12:25 PM
    • Replies: 0
    • Views: 241
    04-19-2016, 12:25 PM Go to last post
  39. 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 08:50 AM
    2 Pages
    1 2
    • Replies: 24
    • Views: 4,531
    04-19-2016, 11:59 AM Go to last post
  40. 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 06:50 AM
    • Replies: 5
    • Views: 493
    04-18-2016, 06:32 PM Go to last post
  41. 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 07:35 PM
    confounding, polychotomous, polytomous
    • Replies: 0
    • Views: 238
    04-16-2016, 07:35 PM Go to last post
  42. 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 11:47 AM
    • Replies: 0
    • Views: 314
    04-16-2016, 11:47 AM Go to last post
  43. 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 01:37 PM
    • Replies: 2
    • Views: 389
    04-15-2016, 03:12 PM Go to last post
  44. 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 02:53 PM
    • Replies: 7
    • Views: 636
    04-15-2016, 05:39 AM Go to last post
  45. 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 12:08 PM
    • Replies: 8
    • Views: 661
    04-14-2016, 10:02 AM Go to last post
  46. 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 04:55 PM
    • Replies: 0
    • Views: 249
    04-13-2016, 04:55 PM Go to last post
  47. 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 08:08 AM
    • Replies: 0
    • Views: 283
    04-13-2016, 08:08 AM Go to last post
  48. 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 06:30 PM
    • Replies: 0
    • Views: 296
    04-12-2016, 06:30 PM Go to last post
  49. 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 09:54 PM
    comparison, regression, standardization
    • Replies: 0
    • Views: 316
    04-11-2016, 09:54 PM Go to last post
  50. 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 05:07 AM
    • Replies: 0
    • Views: 518
    04-08-2016, 05:07 AM Go to last post
  51. 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 12:12 PM
    • Replies: 2
    • Views: 385
    04-07-2016, 02:26 PM Go to last post
  52. 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 11:09 AM
    • Replies: 1
    • Views: 389
    04-07-2016, 08:16 AM Go to last post
  53. 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 05:15 AM
    • Replies: 1
    • Views: 229
    04-07-2016, 08:10 AM Go to last post
  54. 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 02:45 PM
    • Replies: 6
    • Views: 484
    04-06-2016, 08:06 AM Go to last post
  55. 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 09:12 AM
    • Replies: 4
    • Views: 367
    04-06-2016, 05:44 AM Go to last post
  56. 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 09:38 AM
    • Replies: 1
    • Views: 330
    04-05-2016, 08:25 AM Go to last post
  57. 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 09:14 AM
    • Replies: 0
    • Views: 534
    04-04-2016, 09:14 AM Go to last post
  58. 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 02:16 PM
    • Replies: 0
    • Views: 451
    04-03-2016, 02:16 PM Go to last post
  59. 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 08:08 AM
    log-linear
    • Replies: 0
    • Views: 250
    04-03-2016, 08:08 AM Go to last post
  60. 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 12:41 PM
    • Replies: 0
    • Views: 355
    04-02-2016, 12:41 PM Go to last post

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