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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Variable transformation in OLS regression

    Hi there, I have a question related to the transformation of independent variables in an OLS regression. More specifically: When I transform...

    Started by Tux‎, 06-14-2016 10:08 PM
    • Replies: 7
    • Views: 4,598
    06-20-2016, 06:48 PM Go to last post
  2. AUC below 0.5

    Hi, I am calculating area under the curve (AUC) values for the individual independent variables of a conditional logistic regression model. I am...

    Started by teapot‎, 06-16-2016 10:50 PM
    • Replies: 3
    • Views: 1,765
    06-20-2016, 12:23 PM Go to last post
  3. Effective DoF with lag1 autocorrelated data...how to actually incorporate ?

    Hi all, I have some time series data that is auto-correlated, and I am trying to account for in my correlation analysis. I have found out how to...

    Started by iceman92‎, 06-18-2016 12:13 AM
    • Replies: 2
    • Views: 1,089
    06-20-2016, 02:41 AM Go to last post
  4. Can someone help me interpret this data?

    I'm performing multiple regression for an international relations thesis regarding various predictor variables and the outcome of intervention in...

    Started by datorres85‎, 06-18-2016 09:01 PM
    • Replies: 5
    • Views: 1,231
    06-19-2016, 06:58 PM Go to last post
  5. Pooled GLS and POLS

    Hello everyone, This semester I'm studying, OLS, GLS, RE, FE, MLE, and a lot of beautiful concepts :D. But I get a little bit concerning the...

    Started by endlessend25‎, 06-18-2016 07:57 AM
    gls, ols, pooled
    • Replies: 0
    • Views: 1,659
    06-18-2016, 07:57 AM Go to last post
  6. Two categorical variables, one continuous dependent variable

    Hi, I want to check whether linear regression is the statistical tool I need and ways of checking whether my data is appropriate for this...

    Started by SpoodleBeast‎, 06-15-2016 03:33 PM
    • Replies: 3
    • Views: 1,679
    06-17-2016, 12:23 PM Go to last post
  7. CI for Dependent Variable in Multiple Linear Regression

    I have a regression model but I want to get a 95% confidence interval of the dependent variable for given values of the independent variables. I...

    Started by Jegpeg‎, 02-25-2016 08:21 PM
    confidence interval, regression
    • Replies: 1
    • Views: 934
    06-17-2016, 11:58 AM Go to last post
  8. Regression Analysis from R output

    plz delete this thread.

    Started by absxneverdie‎, 06-17-2016 09:50 AM
    • Replies: 0
    • Views: 1,169
    06-17-2016, 09:50 AM Go to last post
  9. interaction continuous*dummy:possible to treat continuous variable as the moderator?

    Hey everyone. This is my first post here so please be kind to me :) . For my thesis my aim is to run a moderation analysis between organizational...

    Started by noodlee999‎, 06-16-2016 06:44 AM
    interaction, interpretation, likert, moderation, regression
    • Replies: 1
    • Views: 890
    06-17-2016, 04:42 AM Go to last post
  10. Post Consolidation of items for regression analysis

    Hello everyone! I am a stats newbie and have a very basic question. Please forgive me if the question may seem too foolish. I wanted to conduct...

    Started by scooper23‎, 06-15-2016 08:31 PM
    • Replies: 1
    • Views: 1,418
    06-16-2016, 09:12 PM Go to last post
  11. General guidance on interpreting residuals and diagnostics for linear regressions

    Now that I'm more comfortable with regression (in SAS) and understand the assumptions needed for linear regression, I'm able to run simple models of...

    Started by semidevil‎, 06-13-2016 11:00 AM
    • Replies: 5
    • Views: 2,167
    06-14-2016, 07:18 AM Go to last post
  12. Multiple Regression Analysis - Two independent variables, one w/same values

    Post closed.

    Started by ablong‎, 06-13-2016 12:18 AM
    econometrics
    • Replies: 4
    • Views: 1,636
    06-13-2016, 09:23 AM Go to last post
  13. Causal mediation analysis with lagged endogeneous regressors

    Hello dear forum members! So, in the study I am currently working on, I have the following (simplified) Poisson panel model with fixed-effects...

    Started by kiton‎, 06-11-2016 03:16 PM
    • Replies: 1
    • Views: 1,041
    06-12-2016, 11:56 PM Go to last post
  14. Smile Interpret Transformed Independent Variables

    Dear Forum, I ran a logistic regression and one of my Independent variables was transformed with a LG10. I know from normal non transformed...

    Started by beatoctane‎, 06-12-2016 07:22 AM
    • Replies: 1
    • Views: 784
    06-12-2016, 12:15 PM Go to last post
  15. Unhappy Help !! 3 days for my thesis ! Robustness for independent variables?

    Dear Forum, I have a huge problem. I am running a logisitc regression and for some IVs the assumption of linearity was not met. Now I need...

    Started by beatoctane‎, 06-12-2016 07:32 AM
    • Replies: 0
    • Views: 1,124
    06-12-2016, 07:32 AM Go to last post
  16. My First Model

    Hello, I am doing a Master's and I am at the dissertation stage, and have to write and test a model empirically. However I am not sure about...

    Started by vt1‎, 06-11-2016 02:29 AM
    elasticity, multiple regressors, non-linear regression, stata
    • Replies: 1
    • Views: 1,115
    06-11-2016, 01:44 PM Go to last post
  17. Evaluating regression models help

    I'm new to regression and am needing some assistance in evaluating a model. The relationship I'm trying to obtain is the relationship between credit...

    Started by semidevil‎, 06-10-2016 03:56 PM
    • Replies: 0
    • Views: 917
    06-10-2016, 03:56 PM Go to last post
  18. Orthogonal-polynomial contrasts

    Hi there, During my studies, I always learned that, when you have an independent ordinal variable, you could include it into your regression...

    Started by Tux‎, 06-09-2016 04:56 PM
    • Replies: 0
    • Views: 953
    06-09-2016, 04:56 PM Go to last post
  19. Detecting and adjusting for heteroskedasticity in ordinal logistic models

    Does anyone know how to check whether heteroskedasticity is present in an ordinal logistic regression analysis? And, if present, how can it be...

    Started by KV Weyde‎, 06-09-2016 03:13 AM
    • Replies: 0
    • Views: 1,127
    06-09-2016, 03:13 AM Go to last post
  20. Confidence intervals comparison for linear and quadratic slopes?

    Hello, I am using regression analyses to evaluate changes in several different cognitive functions across the life span. In most cases, the...

    Started by IoMar‎, 06-08-2016 09:09 PM
    • Replies: 0
    • Views: 961
    06-08-2016, 09:09 PM Go to last post
  21. Logistic Regression with interactions and contrasts

    Hello All, I need some advice for choosing the correct model. I have 3 binary variables: Risk (0 = the person doesn't take financial risks, 1 =...

    Started by Yankel‎, 06-07-2016 05:55 AM
    • Replies: 5
    • Views: 2,089
    06-08-2016, 09:37 AM Go to last post
  22. SQReg demonstration

    Hello everyone, i need help with this demonstration: SQReg = B1^2*Sxx Someone can help?

    Started by Calion‎, 06-05-2016 11:35 AM
    • Replies: 1
    • Views: 1,691
    06-06-2016, 12:22 PM Go to last post
  23. Constant in linear regression

    Hey guys, Need help in Linear regression: I have a dataset of 70 tumors that during resection we used an electric measurement to estimate a...

    Started by XPeriment‎, 06-05-2016 10:47 PM
    • Replies: 0
    • Views: 2,094
    06-05-2016, 10:47 PM Go to last post
  24. Interpretation of continuous interaction term

    Hi all, I have a question regarding the interpretation of a squared interaction term in the following model: Y=β0+β1X+ β1X^2 + β2Z+ β3 X^2Z ...

    Started by Rene Jansen‎, 06-05-2016 08:13 AM
    continuous moderator, interaction effect, interaction term
    • Replies: 0
    • Views: 1,856
    06-05-2016, 08:13 AM Go to last post
  25. Question Need help to choose right statistical analysis

    Dear all, I have one dependent variable (Y) and 3 independent variables (X1, X2, X3). All dependent and independent variables are continuous. ...

    Started by tony.adib1984‎, 06-05-2016 03:30 AM
    ancova, anova
    • Replies: 0
    • Views: 1,182
    06-05-2016, 03:30 AM Go to last post
  26. Interpreting dummy variables.

    I did not create the following variables, the state I worked for did...They have one variable coded W if you are white 0 otherwise. A second variable...

    Started by noetsi‎, 06-04-2016 05:59 PM
    • Replies: 0
    • Views: 1,348
    06-04-2016, 05:59 PM Go to last post
  27. Beta weights and correlations

    Dear all, I have used regression to explain a dependent variable with a number of independent variables. I expected independent variables which...

    Started by Anthony_1000‎, 06-04-2016 04:05 AM
    beta weights, correlations
    • Replies: 0
    • Views: 924
    06-04-2016, 04:05 AM Go to last post
  28. Logistic regression - basics

    Dearest stat colleagues, I have some basic questions regarding logistic regression that I hope you can help me out with. I’m running a simple...

    Started by Jeff135‎, 05-31-2016 01:39 PM
    • Replies: 4
    • Views: 2,156
    06-01-2016, 06:48 PM Go to last post
  29. How to handle poor reporting unstandardised\standardized coefficients?

    Hi, I have several times problem how to distinguish what is reported in clinical journals in relation to regression analysis. Frequently authors...

    Started by Vlajkony‎, 06-01-2016 05:29 PM
    • Replies: 1
    • Views: 1,010
    06-01-2016, 05:56 PM Go to last post
  30. Is this Multicollinearity?

    Hi guys, im relatively new in this forum. I have a question, i am using multiple regression analysis for my thesis. The result shows the P-value is...

    Started by LizBeth‎, 05-29-2016 11:04 PM
    • Replies: 8
    • Views: 1,290
    06-01-2016, 07:44 AM Go to last post
  31. Can we really(theoretically) generalize fixed regressor linear regression?

    If we have stochastic regressors, we are drawing random pairs $(y_i,\vec{x}_i)$ for a bunch of $i$, the so-called random sample, from a fixed but...

    Started by kzhou‎, 05-29-2016 08:52 AM
    fixed regressor, linear regression, stochastic regressor
    • Replies: 3
    • Views: 1,849
    05-30-2016, 09:16 PM Go to last post
  32. Time-varying covariates in linear mixed models/multilevel models

    Hi! I am a Norwegian phd student exploring the effects of nocturnal road traffic noise exposure in children. One of the research questions is...

    Started by KV Weyde‎, 05-30-2016 04:49 PM
    mixed models, stata, time-varying covariate
    • Replies: 0
    • Views: 2,787
    05-30-2016, 04:49 PM Go to last post
  33. Mediation analysis - an issue of two opposing (contrary) effects

    Hey! I would be very grateful about any advices or comments on an issue I have recently come across. We tested a simple mediation analysis,...

    Started by Martin Marko‎, 05-30-2016 02:52 PM
    • Replies: 0
    • Views: 1,431
    05-30-2016, 02:52 PM Go to last post
  34. out of sample

    Hi There I have 2500 data with 2 sample. one index and another stock. i've done goodness of fit and regression analysis on it.now I've been asked to...

    Started by Zore‎, 05-25-2016 08:36 PM
    • Replies: 3
    • Views: 1,128
    05-30-2016, 07:05 AM Go to last post
  35. Why do you subtract the mean of a predictor variable from that variable..

    An author using temperature as a predictor subtracted its mean value from each temperature data point to deal with "scaling issues." I don't...

    Started by noetsi‎, 05-28-2016 01:10 PM
    • Replies: 5
    • Views: 1,639
    05-29-2016, 11:33 AM Go to last post
  36. Optimal cut-off from ROC

    Hello, as you know, ROC curve is not depend of the cut-off. But how can I get an "optimal" cut-off from ROC curve? Example: I have a database...

    Started by tradermartin‎, 05-25-2016 03:34 AM
    • Replies: 4
    • Views: 1,096
    05-26-2016, 01:53 PM Go to last post
  37. Angry Violation of linearity assumptions - binary logistic regression - what to do?

    I am running a binary logistic regression with SPSS and unfortunately the assumption of linearity (Box-Tidwell procedure) are not met for the...

    Started by beatoctane‎, 05-22-2016 05:18 AM
    • Replies: 10
    • Views: 2,654
    05-26-2016, 01:46 PM Go to last post
  38. Relative impact of variables on DV

    I keep circling back to this issue, this time with a twist. I am arguing with some sports statisticians (who use statistics very differently than the...

    Started by noetsi‎, 05-26-2016 09:01 AM
    • Replies: 1
    • Views: 1,216
    05-26-2016, 01:18 PM Go to last post
  39. Multiple linear regression: square root transformation of predictor variable

    I have used a square root transformation to successfully correct the positive skew of a predictor variable in a hierarchical multiple linear...

    Started by carswa‎, 05-25-2016 03:38 PM
    • Replies: 0
    • Views: 1,923
    05-25-2016, 03:38 PM Go to last post
  40. Individual vs. Team Aggregated Data

    I have a set individuals (let's say ID_No 1 through 50) and a set of metrics that pertain to these individuals: things like age, SAT reading score,...

    Started by JeremyPiven‎, 05-25-2016 12:19 PM
    aggregation, multivariate
    • Replies: 0
    • Views: 822
    05-25-2016, 12:19 PM Go to last post
  41. Logistic regression with repeted measures

    Hi, I'm new in logistic analysis. I have binary outcome (energy...) day 1,2 and 3 (yes/no) for each patient (id). I would like to test whether...

    Started by Aleco‎, 05-25-2016 11:32 AM
    • Replies: 0
    • Views: 538
    05-25-2016, 11:32 AM Go to last post
  42. how to argue using wald-test/LR-test for logistic Regression

    Hey there, I'm writing my thesis and I did a logistic regression in a data set. At first, it didn't come into my mind that I should argue why I'm...

    Started by abced‎, 05-25-2016 07:38 AM
    • Replies: 0
    • Views: 677
    05-25-2016, 07:38 AM Go to last post
  43. OLS regression with interdependence

    Hello everyone, I have been writing my thesis and decided, together with my supervisor, to use OLS even though my actors are interdependent...

    Started by TiUResearch‎, 05-25-2016 06:15 AM
    ols interdependence
    • Replies: 0
    • Views: 1,034
    05-25-2016, 06:15 AM Go to last post
  44. Question Dimson method - t-statistics on summarised betas ?

    Hi, Currently trying to apply the Dimson method(Dimson 1979. Link provided below), on the market model due to infrequent trading. Our...

    Started by Sigve‎, 05-23-2016 05:30 AM
    • Replies: 0
    • Views: 2,858
    05-23-2016, 05:30 AM Go to last post
  45. R help with Binary log reg

    Apologies -- should have posted my question in the R forum instead

    Started by ling5900‎, 05-22-2016 01:24 PM
    • Replies: 0
    • Views: 1,137
    05-22-2016, 01:24 PM Go to last post
  46. Chi-square instead of Multiple Regression Analysis

    Can someone help me? How can I explain that I used Chi-square test of association instead of Multiple Linear Regression Analysis because I had...

    Started by choco21lit‎, 05-21-2016 11:42 AM
    • Replies: 0
    • Views: 1,186
    05-21-2016, 11:42 AM Go to last post
  47. Interpretation of a lagged dependent variable, coefficient as proportion- Panel data

    Dear experts! I am having some difficulties in interpreting the results of my regression model using Blundell–Bond linear dynamic panel-data...

    Started by JacobPedersen‎, 05-20-2016 12:41 PM
    blundell-bond, coefficicent, difference gmm, interpreting results, proportion
    • Replies: 0
    • Views: 1,257
    05-20-2016, 12:41 PM Go to last post
  48. Alcoolimetric Table

    Any idea for estrapolation data for this table? I have read spec gravity= 0.8013 what will the content of Alcool? ...

    Started by crimelist‎, 05-20-2016 09:10 AM
    • Replies: 0
    • Views: 1,328
    05-20-2016, 09:10 AM Go to last post
  49. Logistic Regression interpretation help

    Hello I'm working on a project and had some debates with my colleagues on logistic regression model. Hope someone here can clarify for us. Let's...

    Started by factorregression‎, 05-18-2016 01:14 PM
    logisitic regression
    • Replies: 0
    • Views: 1,062
    05-18-2016, 01:14 PM Go to last post
  50. Repeated measures, random effects, or both?

    Hi, I have the following situation and I do not know if it is a case that calls for repeated measures or individual-specific random effects. We...

    Started by agp‎, 05-04-2016 02:55 PM
    • Replies: 6
    • Views: 1,227
    05-18-2016, 08:08 AM Go to last post
  51. Field's test for linearity of the logit

    Hello, I am currently working on my bachelor thesis and I ran a logistic regression on a data set I have. From Field's 'Discovery Statistics...

    Started by abced‎, 05-17-2016 07:19 AM
    • Replies: 0
    • Views: 1,801
    05-17-2016, 07:19 AM Go to last post
  52. SPSS - Regression - interpretation and generalizing results

    Hello, Im really grateful you have taken the time to read my post. Thanks for your help. Im doing a regression analysis trying to predict...

    Started by Adam35‎, 05-16-2016 06:46 AM
    • Replies: 2
    • Views: 1,449
    05-16-2016, 08:36 AM Go to last post
  53. 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: 1,332
    05-15-2016, 09:50 AM Go to last post
  54. 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: 1,238
    05-15-2016, 08:58 AM Go to last post
  55. 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: 1,642
    05-12-2016, 01:48 PM Go to last post
  56. 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: 1,291
    05-10-2016, 03:57 PM Go to last post
  57. 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: 1,273
    05-10-2016, 02:35 PM Go to last post
  58. 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: 1,175
    05-10-2016, 07:42 AM Go to last post
  59. 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: 2,351
    05-09-2016, 03:59 PM Go to last post
  60. 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: 1,265
    05-09-2016, 09:44 AM Go to last post

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