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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Regression Possibility?

    I've got some real data (from a real experiment), and I'm having trouble finding a way to carry out a regression. The independent variable is...

    Started by AdvoTDV‎, 03-04-2011 12:45 AM
    • Replies: 2
    • Views: 2,194
    03-04-2011, 04:03 AM Go to last post
  2. Multiple Groups Regression

    Hello to all who view my thread. And thank you in advance for any assistance. I am trying to compare changes in the associations between multiple...

    Started by adzzz‎, 02-13-2009 11:11 AM
    2 Pages
    1 2
    • Replies: 15
    • Views: 12,124
    07-20-2012, 04:22 PM Go to last post
  3. Unique vs. Shared Variance Multiple Regression

    Hi all, I am having trouble with interpreting the explained variance of my multiple regression model. I ran a hierarchical model with nine...

    Started by Aegislash‎, 03-31-2017 04:43 AM
    • Replies: 1
    • Views: 1,291
    03-31-2017, 06:41 PM Go to last post
  4. Process Model and Covariates

    Hi all, I am having difficulty with Andrew Hayes' Process tool and my mediation model. Is it acceptable to run a mediation analysis with a...

    Started by Aegislash‎, 03-02-2017 08:48 AM
    andrew hayes, covariates, process model
    • Replies: 6
    • Views: 2,097
    03-05-2017, 02:59 PM Go to last post
  5. Expert Help Required - Multiple Regression with Nominal and Scale Variables

    Hi all, I'm having huge issues with the assumptions of multiple regression and determining whether I am running my analysis correctly. First of...

    Started by Aegislash‎, 02-27-2017 05:28 AM
    dummy coding, multiple regression, nominal, scale
    • Replies: 4
    • Views: 2,069
    02-27-2017, 01:25 PM Go to last post
  6. Reporting Dummy Variables and Determining Significance

    Hi all, I was just wondering, how does a person determine the significance of a categorical variable in a hierarchical regression model if one...

    Started by Aegislash‎, 06-27-2017 12:11 PM
    control, dummy variables, hierarchical regression, significance, step 2
    • Replies: 1
    • Views: 394
    06-27-2017, 12:46 PM Go to last post
  7. Alternative for a multi-level analysis

    Hi all, For my criminology thesis I am analysing police interviews and would like to research the effect (the presence of) an attorney has on...

    Started by Aeleanor‎, 08-25-2015 08:15 AM
    analysis, logistic, multi-level, nested, regression
    • Replies: 1
    • Views: 1,489
    08-25-2015, 10:13 AM Go to last post
  8. quick question

    Can someone tell me the difference between Model I and Model II regression? I have some data that I'd like to plot in JMP but I'm not sure which...

    Started by aesopclimber‎, 11-09-2010 04:43 AM
    • Replies: 0
    • Views: 2,871
    11-09-2010, 04:43 AM Go to last post
  9. Exclamation Problem with results in ordinal regression...

    Hello and thanks in advance for any response... I have 60 likert-type questions (5 items) (and their responses of course...) and age. Age as raw...

    Started by Afrodite‎, 05-15-2017 09:42 AM
    ordinal regression
    • Replies: 3
    • Views: 1,079
    05-22-2017, 08:44 PM Go to last post
  10. Surface Response Metodolgy: What model should i use for a 2 factor design

    I made a SRM for a chemistry experiment. The factors analyzed were 2 an i had 5 responses. For the model can i use a cubic model or should i use a...

    Started by afsechem‎, 07-11-2011 02:11 PM
    optimization, srm
    • Replies: 0
    • Views: 2,215
    07-11-2011, 02:11 PM Go to last post
  11. External validation of a log reg model using Nagelkerkes R2 w/ fixed parameters

    I have a dataset containing a point score (an integer between 0-41) and mortality (0/1) for a sample. I have performed a logistic regression...

    Started by ag90‎, 03-30-2017 08:05 AM
    external validation, logistic regression, nagelkerke, rsquared
    • Replies: 0
    • Views: 382
    03-30-2017, 08:05 AM Go to last post
  12. Standard errors in IV and 2SLS

    Hi guys, I'm running an instrumental variable regression and the same two stage least squares regression in R. I get the same coefficient...

    Started by Ageo7836‎, 05-20-2011 11:31 PM
    • Replies: 1
    • Views: 3,597
    05-21-2011, 06:47 AM Go to last post
  13. Rescaling Variables

    hi guys, I'm trying to rescale variables so that I don't get such small coefficients. How should I go about this? Multiply independent by a...

    Started by Ageo7836‎, 05-26-2011 08:39 PM
    • Replies: 1
    • Views: 3,376
    05-29-2011, 07:01 PM Go to last post
  14. Model fit vs. Prediction

    When it comes to regression, a lot of people are obsessed (as they should be) with how well a model fits. But what about how well the model can...

    Started by agp‎, 01-13-2013 10:27 AM
    • Replies: 6
    • Views: 2,826
    01-18-2013, 04:53 PM Go to last post
  15. 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: 1,139
    05-18-2016, 08:08 AM Go to last post
  16. Normality assumption for Regression

    I have an outcome variable that is composed of one item on a 3 point scale to assess participation (none-1, member of 1 program-2, member of both...

    Started by agrig12‎, 02-05-2013 12:00 PM
    normality, regression assumption
    • Replies: 6
    • Views: 2,059
    02-05-2013, 04:04 PM Go to last post
  17. Control variable correlated with binary treatment variable

    This question regards a social program evaluation which involves participants receiving a binary treatment that they self-select into. Some of these...

    Started by agsalomon‎, 12-24-2011 12:16 AM
    • Replies: 0
    • Views: 2,002
    12-24-2011, 12:16 AM Go to last post
  18. Log-linear model with negative values

    I would like to estimate a log-linear model which contains negative values in the dependant variable. The only advice I've seen is to add a constant...

    Started by agsalomon‎, 11-09-2013 02:57 AM
    • Replies: 0
    • Views: 1,105
    11-09-2013, 02:57 AM Go to last post
  19. ANCOVA woes

    I'm having real trouble interpreting the output from my ANCOVA. I have two conditions control and experimental, my dependent variable is state...

    Started by ah428‎, 04-25-2014 02:13 PM
    • Replies: 0
    • Views: 1,561
    04-25-2014, 02:13 PM Go to last post
  20. what method to use for modeling flue motality rate

    Here is the flu mortality graph from CDC. http://www.cdc.gov/flu/weekly/weeklyarchives2010-2011/images/picurve22.gif Mortality rate(red line) is...

    Started by aha123‎, 06-12-2011 08:42 PM
    • Replies: 1
    • Views: 2,561
    06-12-2011, 09:32 PM Go to last post
  21. GJR GARCH in Stata

    Hello, I am doing a research paper on finding the asymmetric volatility 14 stock indexes from around the world, and for this I am using EGARCH...

    Started by Ahmad‎, 08-28-2012 12:36 AM
    gjr-garch, stata
    • Replies: 0
    • Views: 3,300
    08-28-2012, 12:36 AM Go to last post
  22. Regression Lines

    Can someone please explain this to me In a random sample of 40 students, the mean number of hours spent studying is 7.5 with a standard deviation...

    Started by Ahmed.abdullah‎, 10-11-2016 11:36 AM
    • Replies: 1
    • Views: 1,004
    10-11-2016, 11:48 AM Go to last post
  23. Logistic regression- categories

    I am very new into Spss and spent a few hours to understand logistic regression. :shakehead I could not understand the relationship between 0...

    Started by ahmetx‎, 06-01-2014 03:46 PM
    logistic regression, spss
    • Replies: 2
    • Views: 1,848
    06-04-2014, 05:48 AM Go to last post
  24. How to Handle Blank Fields in Multiple Linear Regression

    I am building a regression with 45 samples across 20+ independent variables. I am randomly selecting subsets of the variables and running many...

    Started by Ahmntz‎, 06-29-2015 08:24 AM
    blank fields, least squares regression, missing data, regression, regression analysis
    • Replies: 2
    • Views: 1,311
    07-02-2015, 01:32 PM Go to last post
  25. Multiple Linear Regression in Environmental Justice Analysis

    Hi, I have 982 data points (census block groups) for which I have information on % minority and low income, and levels of air pollution. I did MLR...

    Started by aida‎, 08-18-2011 03:09 PM
    • Replies: 3
    • Views: 3,115
    08-18-2011, 04:50 PM Go to last post
  26. Aggregating or Pooling Multinomial Logistic Regression Coefficients

    I'm trying to recreate the MNL analysis like this paper or this one. In Excel I have a sheet with my choice column which contains the market share...

    Started by airflorida‎, 10-29-2013 12:09 AM
    logistic regression
    • Replies: 1
    • Views: 1,614
    10-31-2013, 05:35 PM Go to last post
  27. SAS GLIMMIX subject specific estimates

    I am trying to analyze a dataset where each subject has 12 repeated measures (quarterly, over 3 years). I want to extract subject specific estimates...

    Started by aisley‎, 07-08-2015 08:52 AM
    glimmix, longitudinal study, mixed effects model, negative binomial model, sas
    • Replies: 3
    • Views: 997
    07-08-2015, 01:41 PM Go to last post
  28. Newbie Logistic regression/weighted regression

    Greetings I have been reading this article http://vassarstats.net/logreg1.html and trying to understand it but I am getting confused at how they...

    Started by aivoryuk‎, 07-26-2012 03:19 PM
    • Replies: 6
    • Views: 2,324
    07-31-2012, 05:03 PM Go to last post
  29. Calculate Intercept for multiple regression

    I have been using a simple Logistic Regression method with Log odds and it works very well for me This is an example X yes no total Prob Odds Log...

    Started by aivoryuk‎, 10-31-2012 09:21 AM
    • Replies: 0
    • Views: 2,507
    10-31-2012, 09:21 AM Go to last post
  30. Combining linear regressions

    I have two variables, x and y, and I am using linear regression to predict y from x over a large set of subjects. There are multiple observations per...

    Started by aix‎, 06-01-2010 02:48 PM
    • Replies: 0
    • Views: 2,953
    06-01-2010, 02:48 PM Go to last post
  31. Multiple Regression

    Hi, I am trying to do my analysis for my work but getting very confused. I am using multiple regression and have my dependent variable, which...

    Started by ajenki10‎, 08-11-2010 06:23 AM
    • Replies: 1
    • Views: 1,866
    08-11-2010, 11:30 PM Go to last post
  32. Multiple Regression, Analysing Attachment Dimensions

    Hi, I am trying to do my analysis for my work but getting very confused. I am using multiple regression (SPSS version 17) and have my...

    Started by ajenki10‎, 08-11-2010 08:25 AM
    • Replies: 1
    • Views: 3,699
    08-11-2010, 09:58 AM Go to last post
  33. Linear Regression Models

    I am being asksed if an equation is linear in the paramenters or variables and I am a bit lost. I understand that for something to be linear it cant...

    Started by ajmax01‎, 02-01-2009 12:19 AM
    • Replies: 1
    • Views: 2,792
    02-01-2009, 10:04 AM Go to last post
  34. Question: Sample size and regression

    I have a question regarding sample size and regression. First, the following is a general overview of my study: Purpose of Study: To examine the...

    Started by akak‎, 07-14-2011 10:20 PM
    • Replies: 0
    • Views: 3,135
    07-14-2011, 10:20 PM Go to last post
  35. Interpretaing the coefficients of polynomial regression and multiple regression.

    How do i interpret the coefficients of the 2nd degree polynomial regression model: (crop yield)=1.22+2.1(Nitrogen doses)+3.1(Nitrogen doses)^2 ...

    Started by akash_ansari‎, 10-10-2013 08:10 PM
    multiple regression, polynomial regression
    • Replies: 4
    • Views: 1,397
    10-12-2013, 08:00 AM Go to last post
  36. Robust regression

    Hi, I am trying to use robust regression instead of ordinary least squares since my data set has a lot of outliers but I don't know if I have...

    Started by akhil123‎, 03-28-2011 09:18 PM
    • Replies: 0
    • Views: 4,110
    03-28-2011, 09:18 PM Go to last post
  37. Linear Regression and Box-Cox transformation

    Hi, I have a model which predicts the number of defects in a class which takes into account few standard independent variables like CK metrics....

    Started by Akhila‎, 10-02-2013 08:46 AM
    • Replies: 0
    • Views: 1,809
    10-02-2013, 08:46 AM Go to last post
  38. Interpreting odds ratios

    Deleted post

    Started by akiko_M‎, 08-13-2012 05:07 PM
    • Replies: 0
    • Views: 1,267
    08-13-2012, 05:07 PM Go to last post
  39. Doubt regarding Multiple Regression

    Hi, I have some doubt in Multiple regression. I have Y as the dependent variable (mutual fund returns) I have many independent variables...

    Started by akshay_ajmani‎, 04-20-2008 03:40 PM
    • Replies: 2
    • Views: 3,011
    04-24-2008, 01:13 PM Go to last post
  40. Comparing coefficients with different input dependent variables, but the same model.

    I have the following problem. I have the following model I use per sector (for example: Industrial, telecom, tech etc.): cccountry = a +...

    Started by alain1985‎, 06-10-2011 11:12 AM
    • Replies: 0
    • Views: 1,579
    06-10-2011, 11:12 AM Go to last post
  41. Linear Regression Model Help

    Hi, I don't really understand how I go about this problem. I understand regression but I need a little help here. Question: Reaction time to a...

    Started by alan4cult‎, 03-06-2009 05:51 PM
    • Replies: 2
    • Views: 2,520
    04-29-2009, 09:36 PM Go to last post
  42. Linear regression: multiple independents?

    Hello all you nice people! It's been such a long time since I used SPSS, but I now I have to analyse my data and I have very little time so I'm a...

    Started by alarmclocks‎, 06-16-2012 07:26 AM
    • Replies: 0
    • Views: 1,528
    06-16-2012, 07:26 AM Go to last post
  43. Can AIC values be combined?

    Hello! I have hunted far and wide on the net in an attempt to answer this. Essentially, I'm trying to combine two AIC scores from different parts...

    Started by Alaska15‎, 01-26-2016 12:45 AM
    aic, combining models, growth curve, logistic regression, nonlinear regression
    • Replies: 1
    • Views: 2,101
    01-26-2016, 04:10 AM Go to last post
  44. How to calculate Covariance Matrix for the Excel

    Hi, Hope someone can help me to solve the question of Covariance Matrix for 15 x 15 Q1 Q2 Q1 1 Q2 1 Thank you.

    Started by albert_teo77‎, 02-16-2014 09:12 AM
    • Replies: 0
    • Views: 1,198
    02-16-2014, 09:12 AM Go to last post
  45. Linear regression model - collinearity.

    Hello everyone, I'm have a problem with my linear regression model, I really don't know what to do so I've decided to ask you for help. The...

    Started by aldlp‎, 01-11-2014 01:33 PM
    • Replies: 1
    • Views: 1,382
    01-11-2014, 06:49 PM Go to last post
  46. Normality of residuals in regression: is it mandatory?

    Hi everyone, as I said in a previous post I'm new to this forum, but I have basic concepts of statistics (I mean, I'm not a stat guru but I can deal...

    Started by ale83t‎, 03-19-2014 09:10 AM
    • Replies: 3
    • Views: 1,516
    03-19-2014, 10:48 AM Go to last post
  47. 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: 507
    05-25-2016, 11:32 AM Go to last post
  48. Help with "nominal" variables and dummy coding

    Hi. First of all, I'm sorry for not writing 100% correct as this is not my everyday language :) My quetion I'm working with linear...

    Started by aleksaah‎, 04-20-2012 10:57 AM
    • Replies: 3
    • Views: 2,820
    04-21-2012, 03:07 AM Go to last post
  49. beta coefficient for a logistic regression

    I consider a simple model with binary variable Y (diseased vs non-diseased), variable X normally distributed among diseased and non-diseased with...

    Started by Alex C‎, 03-01-2017 09:57 AM
    • Replies: 7
    • Views: 1,559
    03-01-2017, 04:57 PM Go to last post
  50. 2SLS - endogeneity issue

    I am running a regression on the relationship between aid inflows and investment levels in developing countries. One obvious other explanatory...

    Started by Alex E‎, 05-01-2006 09:37 AM
    • Replies: 1
    • Views: 3,463
    05-06-2006, 01:40 PM Go to last post
  51. Implement Young's Information Criterion in Matlab for analyzing recursive arx models

    Hey For an assignment we want to implement the YIC instead of Aikake's information criterion because it's more suitable to fit our data. We have...

    Started by Alex40014‎, 11-20-2015 04:24 AM
    • Replies: 0
    • Views: 1,579
    11-20-2015, 04:24 AM Go to last post
  52. Anyone familiar with this statistical paradox?

    I have discovered an interesting statistical paradox. If you familiar with it, please, let me know about its conventional name (or author's name) and...

    Started by Alex777777‎, 01-20-2015 04:25 AM
    • Replies: 0
    • Views: 1,229
    01-20-2015, 04:25 AM Go to last post
  53. What means "1/X weighted multiple regression"

    What means 1/X weighted multiple regression? Is it just WLS with weights = "1/X" or I'm missing smth? :confused:

    Started by alex84‎, 12-11-2009 09:17 PM
    • Replies: 1
    • Views: 4,601
    12-12-2009, 01:42 PM Go to last post
  54. non-nested models in multilevel analysis

    Hi, I have a question on multilevel analysis. I'm reading a book by Kreft & de Leeuw (Introducing Multilevel Analysis). They give an example for a...

    Started by alex92‎, 03-31-2011 08:15 AM
    • Replies: 1
    • Views: 3,745
    03-31-2011, 10:37 AM Go to last post
  55. Fitting of a linea mixed model

    Hello I'm trying to modelize the diving depth of birds according to categorical (sex, age class: adults/subadults) and conitnuous parameters...

    Started by Alex939‎, 09-26-2013 05:00 PM
    • Replies: 8
    • Views: 2,147
    09-27-2013, 08:36 AM Go to last post
  56. Insignificant regression explanation-HELP!!!

    Hi, As part of my dissertation I am doing a regression analysis in which I am examining if gender, age, Internet use, education and occupational...

    Started by alexandros__23‎, 01-15-2011 07:39 PM
    • Replies: 5
    • Views: 25,012
    01-16-2011, 01:24 PM Go to last post
  57. Collinearity

    Hi, Is there any possibility that if colinearity exists between two or more DV variables in a regression analysis, the regression analysis to be...

    Started by alexandros__23‎, 01-16-2011 03:33 PM
    • Replies: 3
    • Views: 5,892
    01-17-2011, 08:00 AM Go to last post
  58. linear regression without intercept with dummy variables

    Hello, i run simple linear with one dummy variables and no intercept. i would like to understand the meaning of this. for example, my beta1=1.2,...

    Started by AlexeyS‎, 08-20-2016 12:59 AM
    dummy variables, linear regression, no intercept
    • Replies: 1
    • Views: 1,788
    08-20-2016, 06:13 AM Go to last post
  59. transformation on variables

    I run simple linear regression, and saw that my residuals not distributed normally. my dependent variable histogram was as log-normal, i did a...

    Started by AlexeyS‎, 08-20-2016 01:41 AM
    • Replies: 0
    • Views: 917
    08-20-2016, 01:41 AM Go to last post
  60. Polynomial Regression

    Hi, I have done a polynomial regression to some nonlinear (u-shaped) data by adding a squared term. Now, my R-squared 1.0 but my tolerance has...

    Started by Alexia‎, 04-27-2013 02:20 PM
    • Replies: 1
    • Views: 1,459
    04-27-2013, 04:31 PM Go to last post

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