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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Incremental update to *existing* Logistic Regression model?

    Hi, In our work, we have a large-scale logistic regression model we hate to train everyday. Is there a way we can somehow update the existing...

    Started by peacherwoo‎, 01-17-2011 01:47 PM
    incremental, l1 regularizer, logistic regression, update
    • Replies: 6
    • Views: 8,878
    05-28-2014, 03:18 AM Go to last post
  2. Cutoff points in logistic regression

    One of the articles I am reading now makes reccomendations for changing the cuttoff point used in predicting whether Y=1 or 0. My question is, since...

    Started by noetsi‎, 07-05-2013 12:34 PM
    • Replies: 6
    • Views: 13,257
    03-27-2014, 08:17 AM Go to last post
  3. SPSS - Logistic Regression - Continuous independent and moderating variables

    Hi, I'm trying to analyse the relation between 4 independent variables and 1 dependant variable (yes=1, no=0), using Logistic Regression, in SPSS....

    Started by MarisaFernandes‎, 08-19-2013 06:42 PM
    logistic regression, spss
    • Replies: 6
    • Views: 2,855
    09-29-2013, 11:46 PM Go to last post
  4. Question Ranking a Location using Linear Regression

    Hi, I am facing a strange problem with a software patented in the USA. It is a location evaluation software, which offers insights on determining...

    Started by Confidential‎, 11-22-2015 06:23 AM
    • Replies: 6
    • Views: 2,159
    11-24-2015, 09:32 AM Go to last post
  5. predictor variables with many zeros

    My explanatory variables are count data and some have many zeros. In linear regression variance is increasing with increasing explanatory and...

    Started by matijas‎, 01-20-2014 06:29 PM
    • Replies: 6
    • Views: 2,901
    01-21-2014, 07:38 AM Go to last post
  6. Logit Regression Odds when some possible outcomes have been removed

    This is my first post of this forum. I'm working on a Logit Regression to predict the nominees and winners of various movie awards. Luckily, I...

    Started by harmonica2‎, 11-18-2013 09:10 PM
    • Replies: 6
    • Views: 1,693
    11-20-2013, 11:46 PM Go to last post
  7. 'Significant' product-term interaction but no significant simple main effect contrast

    :wave: I'm conducting a conditional logistic regression to assess the association between a continuous predictor and a dichotomous outcome,...

    Started by Prof.B.‎, 11-25-2013 04:43 PM
    contrasts, interaction, logistic regression, sas
    • Replies: 6
    • Views: 4,080
    11-26-2013, 07:43 PM Go to last post
  8. Logistic Regression: attaching 95% CI to predicted probabilities

    Hi All, I was wondering how calculate 95% CI for predicted probabilities. I have read how to do the same for odd-ratios, but the way in which what...

    Started by gianmarco‎, 12-01-2013 11:51 AM
    • Replies: 6
    • Views: 9,831
    12-02-2013, 04:54 PM Go to last post
  9. Logistic regression

    Good afternoon, I write to you for 3 questions. Thanks for your help. When in a regression analysis the correct model is unknown before the...

    Started by figone‎, 01-29-2014 04:59 PM
    • Replies: 6
    • Views: 3,140
    03-22-2014, 02:04 PM Go to last post
  10. Robust regression and normality test

    Hi all, When running linear regression I identified certain outliers that influence the regression model, and after analyzing I decided that the...

    Started by marcosampaio‎, 02-19-2014 09:41 PM
    • Replies: 6
    • Views: 2,211
    03-04-2014, 03:28 PM Go to last post
  11. Lag Length for Breusch Godfrey with Cross Sectional data

    Hey guys, I am working on my master thesis and I use STATA. I have cross-sectional data with not really a time component. However I ordered my...

    Started by maxt‎, 02-20-2014 09:55 AM
    • Replies: 6
    • Views: 6,535
    03-04-2014, 01:53 PM Go to last post
  12. Grouping educational level in different variables

    hi there! I'm trying to apply a regression model based on the Human Capital Theory. Besides other independent variables, I have grouped the...

    Started by Fanor‎, 02-25-2014 01:51 PM
    education, educational level, human capital theory, regression, variables
    • Replies: 6
    • Views: 1,733
    02-25-2014, 04:06 PM Go to last post
  13. Logistic Regression Interpretation

    Hi everyone. I was wondering how I can interpret the results...especially the odds ratio (ExpB). The predictor (independent variable) is...

    Started by gene2420‎, 02-26-2014 06:44 PM
    • Replies: 6
    • Views: 1,576
    02-27-2014, 02:25 PM Go to last post
  14. Collinearity

    I interacted two variables from my data, and I put the newly created variable on the RHS of my model. However it automatically dropped when I ran the...

    Started by Windows7‎, 02-26-2014 07:15 PM
    • Replies: 6
    • Views: 1,616
    03-05-2014, 06:36 PM Go to last post
  15. Logistic regression - default in 3years time

    I am running a logistic regression to estimate a firms probability to default. My data set covers 10 years data (2002-2011)with each firms' annual...

    Started by jeyni‎, 06-09-2014 06:49 AM
    • Replies: 6
    • Views: 1,953
    06-09-2014, 11:41 PM Go to last post
  16. normality transformation and regression

    Hi, I have performed 1/sqrtY, and sqrtY transformations on different data sets to achieve normal distribution for simple linear regressions. So...

    Started by Deccantraps‎, 07-03-2014 03:52 AM
    normality transformation, regression
    • Replies: 6
    • Views: 1,532
    07-04-2014, 03:11 AM Go to last post
  17. Multiple Regression while variables kept constant


    Started by noslehs‎, 07-17-2014 08:13 AM
    • Replies: 6
    • Views: 1,917
    07-23-2014, 03:02 PM Go to last post
  18. Exclamation Partial Least Square Regression_Interpretation of Result_VIP_Model Equation_urgentpls

    Hello! I would like to ask your help about the interpretation of my results. So I am doing an analysis about which among the environmental predictors...

    Started by desireeeve‎, 07-26-2014 06:43 AM
    interpreting output, interpreting regression, model, multiple regression
    • Replies: 6
    • Views: 1,808
    07-26-2014, 11:53 AM Go to last post
  19. Interaction between time and time-varying between-subjects variable

    I'm struggling with how to think about a question that seems like it should be really straightforward. I have some survey data about regrets...

    Started by CowboyBear‎, 07-31-2014 05:52 PM
    • Replies: 6
    • Views: 1,534
    08-01-2014, 05:35 PM Go to last post
  20. Testing multiple interaction variables in logistic regression

    Hi everyone, For a study that I'm currently conducting I want to know the effect of some of my variables on other variables, which I think should...

    Started by mjspijker‎, 08-03-2014 06:18 PM
    how to, interaction variables, logistic regression, model selection
    • Replies: 6
    • Views: 2,275
    08-04-2014, 07:11 PM Go to last post
  21. Use of factor analysis + regression

    Independent Variable: I have a survey of 50 states indicating the amount of control the state board of education has in 31 areas answered on a three...

    Started by cynicalflyer‎, 08-19-2014 11:49 AM
    • Replies: 6
    • Views: 2,860
    08-26-2014, 05:15 PM Go to last post
  22. Can the PCA scores be used as variables in multiple linear regression

    Hello, I used PCA to reduce the dimensions of a data set of 10 variables into 2 principal components (describing 82% of variance in data set of 10...

    Started by Deccantraps‎, 08-27-2014 06:49 PM
    multiple regression, pca
    • Replies: 6
    • Views: 1,893
    08-31-2014, 04:04 AM Go to last post
  23. Adjusted R-squared

    Hi, I have a few questions. If I am doing linear regression with only one independent variable, is it ever viable to present an adjusted...

    Started by haralds‎, 09-18-2014 01:57 PM
    bootstrap simulation, linear regression
    • Replies: 6
    • Views: 2,500
    09-19-2014, 09:55 PM Go to last post
  24. range of tuning parameters

    Hi All, I have just started my advanced statistics study. And here is one thing I have not been able to understand for long time -- how can we...

    Started by bettertony‎, 10-01-2014 02:40 PM
    cross validation, linear regression, regression, regularization, tuning, tuning parameter
    • Replies: 6
    • Views: 2,645
    10-01-2014, 07:09 PM Go to last post
  25. How to reduce variables in multiple linear regression when multicollinearity present?

    Good morning, afternoon, evening to everyone. First and foremost, this is my innaugural post so I hope I am following all of the recommended...

    Started by heyblinkin‎, 10-03-2014 03:40 PM
    • Replies: 6
    • Views: 2,460
    10-04-2014, 10:47 AM Go to last post
  26. regression models with mixed types of independent variables

    I am working on building a forecasting model, the independent variables are grouped into three types: some variables are continuous; some variables...

    Started by winecoding‎, 10-14-2014 10:24 PM
    forecasting, regression
    • Replies: 6
    • Views: 2,569
    10-15-2014, 12:45 PM Go to last post
  27. Post Multivariate logistic regression analysis from patient data

    I would like to conduct a multivariate regression analysis on patient data using essentially the following setup: Dependent: a continuous...

    Started by muaaman‎, 12-24-2014 01:41 AM
    data, non-linear, options, patient, regression
    • Replies: 6
    • Views: 2,218
    12-27-2014, 06:05 AM Go to last post
  28. Poll Poll: Question Regarding Regression in Biological Research--confusion over ordinal variable

    To begin with, I am relatively unfamiliar with advanced statistics; I am familiar with elementary statistics such as Chi Square and Kruskal-Wallis...

    Started by nddn‎, 12-25-2014 03:18 PM
    • Replies: 6
    • Views: 2,136
    12-26-2014, 02:21 PM Go to last post
  29. Omnibus F-stat insignificant, anything left to say about reg. coefficients?

    Hi there. I am calculating a multivariate regression by hand, and just calculated the F-stat for the model. Calculated F-stat = 4.899 Critical...

    Started by Kabouterke‎, 01-02-2015 06:58 PM
    • Replies: 6
    • Views: 2,404
    01-03-2015, 08:13 AM Go to last post
  30. (SPSS) External validation for a linear regression model

    Hello, I am investigating relationships of continuous variables and I am aiming at getting a model that can be generalized for the study. My DV is...

    Started by wid‎, 01-02-2015 07:32 PM
    • Replies: 6
    • Views: 3,036
    01-06-2015, 06:49 AM Go to last post
  31. Interpreting the coefficients of my regression model

    Hi all, I am a student at Bournemouth University currently undertaking a research project into the pay-performance sensitivity in AIM companies. I...

    Started by george1660‎, 02-01-2015 05:05 AM
    • Replies: 6
    • Views: 2,187
    02-02-2015, 11:08 AM Go to last post
  32. Two linear regressions or one moderated multiple regression?

    Hi everyone, I would REALLY appreciate any help on this since I've exhausted a lot of options for help already. I have a set of a data with...

    Started by mxw‎, 03-20-2015 04:10 PM
    • Replies: 6
    • Views: 2,045
    03-21-2015, 04:42 PM Go to last post
  33. Regression analysis

    Hi all. Could I use linear regression with not normal distributed variable?

    Started by RealBG‎, 04-03-2015 11:30 PM
    • Replies: 6
    • Views: 2,247
    04-06-2015, 11:39 AM Go to last post
  34. Regression help

    I ran a regression of event sales (y) and advertising spending (x). I got the following results: Correlation: .055 R2: .003 N: 438 y = 1.28x +...

    Started by Robk1015‎, 04-07-2015 07:36 AM
    • Replies: 6
    • Views: 1,956
    04-07-2015, 10:16 AM Go to last post
  35. Comparing two linear regression gradients?

    Hi, I am completely new to linear regression so this may sound daft, but I'm wondering if its possible to test for a significant difference between...

    Started by becread95‎, 04-25-2015 08:24 AM
    • Replies: 6
    • Views: 4,763
    04-29-2015, 09:08 AM Go to last post
  36. optimal sample size

    I'm performing a regression analysis (OLS) and I have the luxury that my sample size is very high (5.000 observations) compared to the number of...

    Started by surveyman‎, 05-01-2015 04:27 AM
    • Replies: 6
    • Views: 1,629
    05-04-2015, 11:25 AM Go to last post
  37. Multiple Regression - Is it possible to constrain the coefficients to be positive?

    Another stumper ... I am running a multiple regression with two independent variables. The regression results look good, except that one coefficient...

    Started by statburner‎, 05-11-2015 01:08 PM
    • Replies: 6
    • Views: 1,924
    05-11-2015, 07:26 PM Go to last post
  38. SPSS Logistic Regression Predicts Too Many Negatives?

    Hello everybody, I have a logistic regression model, where the outcome Yes is coded as 1, No as 0. The split between Yes and No is about 30/70...

    Started by pd1598‎, 07-31-2015 10:41 AM
    • Replies: 6
    • Views: 1,638
    08-01-2015, 02:28 AM Go to last post
  39. control for confounding variables using logistic regression

    Hello... I'm in a project to investigate the prevalence of intrusive thoughts in patients diagnosed with major depressive disorder and non-clinical...

    Started by vahid1990‎, 09-06-2015 08:34 AM
    • Replies: 6
    • Views: 1,856
    09-08-2015, 03:39 PM Go to last post
  40. reading excel file /text file in R

    I am naive programmer..i am working on regression analysis. when i say read.table("filename.txt",header=FALSE)..where does R searches for the file?...

    Started by scuby‎, 09-17-2015 02:00 PM
    • Replies: 6
    • Views: 1,659
    09-17-2015, 10:25 PM Go to last post
  41. Normal logistic regression vs a mixed model; which to use? benefits gained?

    I have some evidence to suggest that one vaccine was far superior over another and resulted in the local elimination of a disease. Because it affects...

    Started by Johann Kotze‎, 09-18-2015 09:48 AM
    health research, logistic regression, mixed model
    • Replies: 6
    • Views: 1,942
    09-29-2015, 11:23 AM Go to last post
  42. Testing a log transformed reg model with the non-log transformed

    Hello, I was wondering how one test two regression models against each other. One being the log transformed of the other like this: y = var1 +...

    Started by nanana‎, 10-08-2015 08:30 AM
    • Replies: 6
    • Views: 1,869
    10-10-2015, 02:40 PM Go to last post
  43. Interpretation of the squared term coefficient in the presence of interaction

    Hello dear form members, Please consider the following regression model: y = a + b1x1 + b2x1^2 + b3x2 + b4x1*x2 + e, Note that x1 is (1)...

    Started by kiton‎, 11-11-2015 04:09 PM
    • Replies: 6
    • Views: 1,819
    12-06-2015, 11:03 AM Go to last post
  44. Estimate a Logistic Regression Model

    Hi guys, I want to estimate a logistic regression model's equation based on observed data and get the coefficients to extrapolate further. I have...

    Started by Oberon‎, 12-03-2015 08:40 AM
    logistic, regression
    • Replies: 6
    • Views: 2,520
    12-04-2015, 01:18 AM Go to last post
  45. Unimodal Link-function possible?

    Hi, using a GLM model (e.g. a Poisson regression), there are various link functions available in statistical packages. However, I don't find an...

    Started by mmercker‎, 01-08-2016 03:14 AM
    glm regression, link function, normal curve, probit
    • Replies: 6
    • Views: 1,427
    01-13-2016, 04:03 PM Go to last post
  46. Regression Analysis for Paired Data SAS

    Hi Everybody, I want to analyze paired data using regression analysis to adjust for covariates. I used PROC MIXED statement in SAS and I modeled...

    Started by Mai Mehanna‎, 02-27-2016 08:34 PM
    • Replies: 6
    • Views: 1,994
    02-29-2016, 08:52 AM Go to last post
  47. Instrumental variable approach in case of interacting endogenous predictors

    Hello dear forum members, Suppose I have the following model: y = a + x1 + x2 + z1 + z2 + z1*z2, where y is exponential, x1-x2 are controls,...

    Started by kiton‎, 03-15-2016 12:13 PM
    • Replies: 6
    • Views: 1,835
    03-26-2016, 12:59 PM Go to last post
  48. Intercept becoming negative(More IDVs)

    Hi All, I have a small query. When regressing revenue against cost, my intercept is positive for X% combos where each combo consists of data...

    Started by vikash_124124‎, 03-18-2016 01:57 AM
    • Replies: 6
    • Views: 1,464
    03-18-2016, 04:08 PM Go to last post
  49. 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: 1,805
    04-06-2016, 07:06 AM Go to last post
  50. 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: 1,582
    04-27-2016, 12:59 PM Go to last post
  51. 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: 1,147
    05-18-2016, 08:08 AM Go to last post
  52. Interaction effect: only main effects significant

    Dear community, I'm running a regression model to test, if there is a difference between the Eastern and Western Germans supporting redistribution...

    Started by Marnie‎, 07-03-2016 09:10 AM
    • Replies: 6
    • Views: 1,573
    07-04-2016, 10:26 PM Go to last post
  53. How to study association between categorical variables?

    I have 4 categorical variables in a dataset let X1, X2, X3 and Y. Where X1,X2 and Y is a binary random variable and X3 have 3 categories. X1,X2...

    Started by askazy‎, 07-10-2016 12:33 PM
    • Replies: 6
    • Views: 1,236
    07-10-2016, 07:00 PM Go to last post
  54. Interpreting an interaction effect

    Hi All, Last year I ran an experiment where I measured the behaviour of a songbird (how long it took them to approach a speaker playing their...

    Started by shardman‎, 08-20-2016 04:35 AM
    • Replies: 6
    • Views: 1,846
    08-23-2016, 04:57 AM Go to last post
  55. What Kind of Regression Do I Need for This?

    I have a data like this. I need to find 7 predictors' coefficients for the best model to predict dependent. It can only be 1 and 0. A B ...

    Started by permaximum‎, 09-09-2016 10:26 AM
    • Replies: 6
    • Views: 1,113
    09-09-2016, 03:09 PM Go to last post
  56. GLM on non-linear/curvilinear data

    Dear all! I’m sure somebody of you will help me with my non-linear data-problem. I measured a fitness correlate of an animal (response variable)...

    Started by Fred.‎, 09-30-2016 08:54 AM
    • Replies: 6
    • Views: 1,586
    10-19-2016, 07:54 AM Go to last post
  57. Calculating predicted probabilities from a logistic regression model SPSS

    Hello everyone, I am trying to calculate individual predicted probabilities from a logistic regression model with SPSS (to describe how a individual...

    Started by kranas‎, 10-30-2016 12:08 PM
    logistic regression, probabilities
    • Replies: 6
    • Views: 5,141
    11-01-2016, 03:52 PM Go to last post
  58. P-value for a regression where expected slope is 1:1

    Hi, I am comparing two values for vegetation cover from two time periods. The expected value is y=x for the slope. I am curious how to calculate a...

    Started by drm258‎, 11-23-2016 07:09 PM
    • Replies: 6
    • Views: 2,960
    11-26-2016, 09:40 AM Go to last post
  59. What is spatial regression?

    This is the first time I have heard of this technique . They are concerned with what they call spatial issues, for example how rural versus urban...

    Started by noetsi‎, 01-09-2017 09:47 AM
    • Replies: 6
    • Views: 2,584
    01-09-2017, 02:41 PM Go to last post
  60. Exp(B) or CI values with the letter "E"

    Dear all, I am running a Multinomial Log. Regression. Everything seems fine but I do not understand when Exp(B) oder CI values are like...

    Started by rezzak‎, 01-26-2017 04:42 AM
    confidence interval, exp(b), logistic regression
    • Replies: 6
    • Views: 3,037
    01-27-2017, 11:42 AM Go to last post

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