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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. generalized least squares

    Hello. How can I modify least square linear regression method in order to fit a straight line to data with non gaussian error (such as Levy, Poisson...

    Started by skan‎, 07-29-2007 01:21 PM
    • Replies: 6
    • Views: 4,142
    08-02-2007, 05:53 AM Go to last post
  2. Nagelkerke and overall hit ratio won't improve in my logistic regression model!

    Hi! I have a problem doing my course assignment(with SPSS): I can't find a way to improve the overall hit ratio and Nagelkerke levels even...

    Started by Ivar‎, 06-13-2013 01:59 PM
    • Replies: 7
    • Views: 4,141
    06-14-2013, 03:31 PM Go to last post
  3. How to choose best robust regression model?

    Hello. There are several robust regression methods like LAR-(aka LAV-, LAD-, L1-Norm-)Regression, Quantil-Regression, M-Estimator, ... They are...

    Started by consuli‎, 02-25-2017 08:01 AM
    2 Pages
    1 2
    robust
    • Replies: 15
    • Views: 4,141
    03-21-2017, 02:05 PM Go to last post
  4. Constant SE from covariance matrix on Multiple Regression

    Hi: I'm currently developing a Statistical package on Ruby, called statsample (http://ruby-statsample.rubyforge.org/), and I'm now working on...

    Started by clbustos‎, 02-18-2010 09:24 AM
    • Replies: 1
    • Views: 4,134
    02-22-2010, 01:47 AM Go to last post
  5. Question If B predicts A, can A also predicts B?

    Hi everyone, I'm new to multiple regression analysis. I have a question and I hope someone can help answer it. Thank you. In a multiple regression...

    Started by statsnewbie28‎, 09-23-2015 11:04 AM
    dependent variable, multiple regression, predictors
    • Replies: 9
    • Views: 4,134
    09-24-2015, 12:55 PM Go to last post
  6. Multiple Regression Question

    Hello, I have a question about multiple regression. My project involves non-political group involvement predicting political participation. My...

    Started by nadia‎, 02-20-2006 07:17 PM
    • Replies: 5
    • Views: 4,122
    02-21-2006, 08:37 PM Go to last post
  7. Predicting rare events using weight-adjusted logistic regression

    This is a simulation study I adapted from sas website. Suppose my probably follows the following relationship, x=rannor(12342); ...

    Started by CRNZNH‎, 12-08-2012 12:37 AM
    • Replies: 2
    • Views: 4,120
    04-09-2014, 02:26 PM Go to last post
  8. Logistic regression: constant variance of Pearson residual condition

    I am currently trying to create a logistic regression model. I know that for good model's the variance of Pearson Residual should be approximately...

    Started by rayuk‎, 12-28-2010 10:30 PM
    • Replies: 0
    • Views: 4,115
    12-28-2010, 10:30 PM Go to last post
  9. Question: Time-Series-Cross-Section Data

    My data: Number of units: 290. Number of years: 4. The units are not sampled. Analysis technique I was thinking of doing an ordinary least...

    Started by Phontastik‎, 01-19-2012 07:12 AM
    • Replies: 3
    • Views: 4,115
    01-30-2012, 06:43 AM Go to last post
  10. theory proofs

    Hi, I am doing a study guide for my stat test coming up, and got stuck on 3 proofs. They seem a bit confusing to me, and I just keep going in circles...

    Started by lilfish08‎, 09-30-2010 02:29 PM
    • Replies: 1
    • Views: 4,112
    09-30-2010, 04:09 PM Go to last post
  11. '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: 4,111
    11-26-2013, 07:43 PM Go to last post
  12. Regression on Growth Rates

    Hi, Is it possible to run a regression on growth rates? The data set has data for orders and other world parameters like GDP, INCOME,...

    Started by prsbrs‎, 04-30-2013 04:27 PM
    • Replies: 0
    • Views: 4,103
    04-30-2013, 04:27 PM Go to last post
  13. Testing for tau equivalence in a simple CFA model, based on correlation matrix

    For an assignment we are provided with only a (polychoric) correlation matrix. One of the questions concerns the different measurement models that...

    Started by mhermans‎, 07-19-2011 07:28 AM
    • Replies: 0
    • Views: 4,102
    07-19-2011, 07:28 AM Go to last post
  14. Cool Datasets for Multiple Linear Regression - How To get the Raw Data ?

    Hello everyone. kindly need ur help.. where can i get the raw data for multiple linear regression. the data should have : Atleast (5 variable)...

    Started by syafgy‎, 06-13-2013 05:32 PM
    multi linear regression
    • Replies: 2
    • Views: 4,102
    06-14-2013, 09:22 AM Go to last post
  15. Var(Y_knot_Hat)

    Hello all, I need a little help with this: Show Var(Y_knot_Hat) = Sigma^2 * (1/n + (x_knot - x_bar)^2 / Sxx) Start with Y_knot_hat = b_knot...

    Started by floriandotti‎, 09-30-2010 01:07 AM
    • Replies: 5
    • Views: 4,096
    09-30-2010, 01:07 PM Go to last post
  16. disattenuated correlations

    Objective: a guess about the actual correlations between two variables based on correlations between somewhat noisy variable estimates. The variable...

    Started by Per‎, 09-18-2010 01:39 AM
    • Replies: 0
    • Views: 4,094
    09-18-2010, 01:39 AM Go to last post
  17. Goodness of fit versus AIC/BIC versus pseudo R squares

    This is geared to Logistic regression I understand in theory you use these for different reasons. AIC for comparing non-nested models and goodness...

    Started by noetsi‎, 03-22-2013 05:17 PM
    • Replies: 6
    • Views: 4,094
    03-25-2013, 10:10 PM Go to last post
  18. potential heteroskedasticity & autocorrelation problem with pooled cross-section data

    hello 1) my data: i have collected a few thousand property transactions over the last 15 years. for each transaction i have got the price and the...

    Started by czeiny‎, 01-11-2012 02:16 PM
    • Replies: 2
    • Views: 4,090
    01-11-2012, 03:56 PM Go to last post
  19. Multiple regression?

    Hi, I'm wondering if it is a bad violation to try to conduct a multiple regression analysis if some of the variables are non-parametric? My...

    Started by Mimi Le Rue‎, 04-11-2006 11:00 AM
    • Replies: 4
    • Views: 4,084
    04-13-2006, 09:59 AM Go to last post
  20. Correlation between reaction time (RT) and accuracy.

    In a two choice task, for each participant, I want to show that the faster is RT, the higher is the probability for incorrect response. Is it...

    Started by Izek‎, 12-24-2011 09:38 AM
    • Replies: 3
    • Views: 4,082
    12-24-2011, 01:23 PM Go to last post
  21. Any good online lectures of time series introduction?

    Hello all: I'm looking to find "good" online videos that provide an introduction to time series analysis (some of the basics, applications....). ...

    Started by lancearmstrong1313‎, 08-05-2013 01:16 PM
    • Replies: 1
    • Views: 4,078
    08-05-2013, 01:50 PM Go to last post
  22. IV probit and Ivreg

    Hello, When I use ivreg in Stata and cluster standard errors my results show that the independent variable is significant. However, when I use...

    Started by carmen256‎, 01-23-2012 02:31 PM
    probit, regression analysis, results
    • Replies: 0
    • Views: 4,076
    01-23-2012, 02:31 PM Go to last post
  23. Regression analysis - normal distribution and linearity

    I am using a scale for a paper. The scores are based on 7 questions with Likert-type responses. I want to use it as a dependent variable in a...

    Started by Staticia‎, 05-29-2008 08:32 AM
    • Replies: 0
    • Views: 4,071
    05-29-2008, 08:32 AM Go to last post
  24. Regression brain teaser

    I have data for 100 farm ponds. I have data for 4 variables: pollution in the pond, number of cows that graze near the pond, number of pigs that...

    Started by Lake scientist‎, 06-01-2010 03:26 PM
    • Replies: 3
    • Views: 4,069
    06-03-2010, 07:41 PM Go to last post
  25. A question about OR

    Hello everybody I have a question about interpretation of OR in logistic regression. My result is like this: Dependent variable is satisfaction...

    Started by badibad‎, 05-21-2014 06:24 AM
    2 Pages
    1 2
    • Replies: 19
    • Views: 4,062
    05-25-2014, 02:58 AM Go to last post
  26. Logistic regression problem

    Hi, I'm experiencing difficulties with understanding my results despite active googling, and i'd be really grateful, if someone could help me. ...

    Started by kati‎, 01-18-2012 08:13 PM
    • Replies: 5
    • Views: 4,061
    01-18-2012, 11:01 PM Go to last post
  27. probit regression with skewed data set

    Hi, I have data from a household survey done in urban and rural areas. The sample size was not the same for both areas. if I combine both data...

    Started by hamnah‎, 06-14-2012 03:24 AM
    • Replies: 1
    • Views: 4,057
    06-14-2012, 04:40 PM Go to last post
  28. Regression analysis sample size problem

    Hi there, Could anybody offer any advice on a linear regression sample size problem? I am using regression to predict the energy consumption...

    Started by bradyj2‎, 07-09-2012 02:03 PM
    • Replies: 1
    • Views: 4,057
    07-13-2012, 02:52 AM Go to last post
  29. Question Coefficient of Determination

    Hi there, I'm using non-linear regression (specially I'm using neural networks for time series prediction) and I'm a bit unsure about the...

    Started by Pooven‎, 06-28-2011 05:05 PM
    r squared
    • Replies: 2
    • Views: 4,055
    06-29-2011, 06:14 AM Go to last post
  30. Trouble standardizing regression slopes

    Dear readers, Hopefully you can help me with the following problem. I am using meta-analytic software to perform a meta-analysis. When I...

    Started by mks650‎, 02-22-2011 12:46 PM
    beta, regression, standardization
    • Replies: 0
    • Views: 4,041
    02-22-2011, 12:46 PM Go to last post
  31. Arrow Plz suggest good textbook for statistics in regression analysis

    Hie. Can anyone please post a good text book or a reference guide for the Multi regression analysis which can explain all the statistics behind the...

    Started by rafters‎, 11-27-2010 02:13 PM
    • Replies: 0
    • Views: 4,033
    11-27-2010, 02:13 PM Go to last post
  32. Categorical regression question

    Hi, everyone Hope the experts here can help me out with a question. I have a database with several respondents providing data on...

    Started by kladan‎, 07-13-2010 12:24 PM
    • Replies: 5
    • Views: 4,025
    07-13-2010, 02:47 PM Go to last post
  33. Testing interaction effects

    I had a few question regarding the testing of interactions. First, should I be centering my variables using the mean and/or standardizing my...

    Started by psychcounsel84‎, 04-04-2011 05:27 PM
    • Replies: 2
    • Views: 4,022
    04-05-2011, 03:15 PM Go to last post
  34. Question Linear Regression Equation

    Dear friends, I have a set of data as follows: 1....... 58.823.23 10....... 62.57.90 50....... 87.232.33 100....... 110.2910.33...

    Started by pavnesh‎, 07-27-2006 05:43 AM
    • Replies: 5
    • Views: 4,020
    08-11-2006, 12:24 AM Go to last post
  35. Binary logistic regression to analyze Likert Scale questionnaire

    Hi, I am sort of stuck with the following problem concerning logistic regression analysis in my research on the determinants of technology...

    Started by adrmck17‎, 04-28-2012 12:24 PM
    • Replies: 0
    • Views: 4,015
    04-28-2012, 12:24 PM Go to last post
  36. Participant ID - Categorical?

    Hi all, I'm performing a Binary Logistic Regression on data from human subjects. I want to ensure that the effect of independent variables is...

    Started by blastStu‎, 09-13-2010 09:44 AM
    • Replies: 0
    • Views: 4,013
    09-13-2010, 09:44 AM Go to last post
  37. tandard errors of the parameter estimates in a quadratic fit

    How do I estimate the standard errors of the parameter estimates in a quadratic fit? This page list the estimate for a linear fit:...

    Started by Ivan David Haigh‎, 10-27-2011 07:52 AM
    regression analysis
    • Replies: 2
    • Views: 4,009
    10-27-2011, 08:06 AM Go to last post
  38. Iv probit

    Hi, Is there a procedure to estimate a probit model in SAS using instrumental variables, like the IVPROBIT in STATA? Thanks!

    Started by SBODILSEN‎, 01-18-2012 07:13 AM
    • Replies: 2
    • Views: 4,005
    01-18-2012, 11:26 PM Go to last post
  39. Question 4 DV's in a regression analysis

    I need to conduct a Regression analysis with 2 IV's and 4 DV's, I was wondering if this is something that is possible? I want to test out a model...

    Started by tammy84‎, 07-23-2010 11:00 AM
    • Replies: 0
    • Views: 4,002
    07-23-2010, 11:00 AM Go to last post
  40. Interpreting PROCESS Output

    Hi everyone, Does anyone know of any good resources to help interpret the process macro output, specifically for model 14? I have the book but it...

    Started by ck926‎, 05-06-2015 09:48 AM
    • Replies: 3
    • Views: 3,988
    05-06-2015, 10:11 AM Go to last post
  41. PCA questions

    here goes... 1. The Kaiser-Meyer-Olkin Measure of Sampling Adequacy and Bartlett's Test of Sphericity tests are done on the standardised or the...

    Started by madhatter‎, 04-18-2009 03:47 AM
    • Replies: 0
    • Views: 3,985
    04-18-2009, 03:47 AM Go to last post
  42. Cluster-robust standard errors needed in random effects model?

    Hello, I'm currently working with a company dataset in the form of an unbalanced panel (overall sample size: 1.300 company years, T: 10, X: ~170...

    Started by Cemon‎, 04-23-2013 04:43 AM
    • Replies: 0
    • Views: 3,980
    04-23-2013, 04:43 AM Go to last post
  43. Moderated Multiple Regression Analysis - but with repeated measures too?

    Dear stats experts, I have been struggling with a problem the whole day and only found a partial solution so far, which I think is not sufficient...

    Started by Geth85‎, 05-30-2013 12:24 PM
    • Replies: 2
    • Views: 3,980
    05-30-2013, 01:39 PM Go to last post
  44. linear regression short easy question

    Hi there, I have the response Y and some covariates. I want to do linear regression. Among the covariates there is the covariate sex (1: male,...

    Started by leo nidas‎, 06-21-2010 06:32 PM
    • Replies: 7
    • Views: 3,976
    06-22-2010, 10:46 AM Go to last post
  45. Correct interpretation of Lmer output

    I have produced the following model ...

    Started by JonoBone‎, 04-19-2013 10:05 AM
    interaction, mixed effects, random effects, regression
    • Replies: 0
    • Views: 3,976
    04-19-2013, 10:05 AM Go to last post
  46. Smile Correlation between two non stationary time series

    Hey everyone, I'm trying to figure out if there is significant correlation between two non stationary time series (e.g. temperature on a a given...

    Started by s_chrodinger‎, 07-28-2014 05:51 PM
    correlation, monte carlo, non-stationary, regression analysis, time series
    • Replies: 9
    • Views: 3,976
    08-01-2014, 02:03 PM Go to last post
  47. Mutliple Regression with a known coefficient

    I'm performing multiple regression on a linear model with several independent variables to generate equations such as: W = aX + bY + cZ X = dW +...

    Started by lfalin‎, 02-05-2007 08:26 AM
    • Replies: 1
    • Views: 3,972
    02-05-2007, 05:27 PM Go to last post
  48. Step by Step by Step help please?

    Hello all, can anyone help me understand this step by step understanding of linear regression and correlation?

    Started by Biostat212‎, 12-02-2010 04:27 PM
    • Replies: 6
    • Views: 3,972
    12-03-2010, 04:14 AM Go to last post
  49. what to do with "bad" logistic regression results

    I ran a simple logistic regression in R and here are my results. my independent variables are all "counts" and I coded my Y as 0 and 1. This is a...

    Started by semidevil‎, 01-18-2017 04:16 PM
    • Replies: 9
    • Views: 3,970
    01-23-2017, 12:18 PM Go to last post
  50. Coefficients of delta-lognormal modeling

    I am trying to understand delta-lognormal modeling. Please bear with me. I am applying this method to some fishery data. This method combines...

    Started by elopomorph‎, 06-25-2011 06:27 PM
    delta lognormal
    • Replies: 2
    • Views: 3,968
    03-16-2012, 11:38 AM Go to last post
  51. Help needed with counter intuitive result in OLS

    Hi All, I have a simple linear regression run between say, statements about the impression with a brand on its favorability What i am getting...

    Started by satish.kumar1986‎, 02-20-2011 02:03 PM
    • Replies: 5
    • Views: 3,967
    02-21-2011, 04:48 AM Go to last post
  52. Bivariate Linear Regression - Assumptions not met

    Hi everyone! :wave: Context. I want to analyze if the age (edat) of my participants is related to their score in a depression scale (HADSD). As both...

    Started by Mase‎, 10-19-2012 04:56 AM
    • Replies: 2
    • Views: 3,967
    10-22-2012, 05:06 AM Go to last post
  53. Variable selection for multiple regression analysis

    Hi everybody there. I want to correlate 2 main variables (say "a" Dependant and "b" independent of course) BUT at the same time i want to add 5 other...

    Started by mzalikhan@gmail.com‎, 04-10-2011 10:07 PM
    multiple regression, variable selection
    • Replies: 2
    • Views: 3,965
    04-11-2011, 06:08 PM Go to last post
  54. "Best" Multiple (Multivariate) Nonlinear Regression?

    Hi all, I'm just getting started in R. I've had good luck finding the right (predictive) correlation weights using orthogonal polynomials in Java....

    Started by Axl‎, 01-21-2009 05:58 PM
    • Replies: 2
    • Views: 3,964
    01-22-2009, 03:05 PM Go to last post
  55. same variable: Single regression not stats sig but multiple regression stats sig?

    Evening, IMy statistical query is that I am conducting a multiple regression ( step down - ommitting the non significant variables one by one). I...

    Started by cousmathematics‎, 11-08-2011 12:00 PM
    • Replies: 2
    • Views: 3,964
    11-09-2011, 04:44 AM Go to last post
  56. Regression Analysis and Hypothesis Testing

    Can someone please help me out with these questions. Thanks guys. Yhat = 227.3642 + 6.4075Xt Σ (Xt - Xbar)^2 = ΣXt^2 ≈33.43 σ2≈35.4198 Xbar =...

    Started by Georgepass‎, 02-14-2013 08:25 AM
    • Replies: 12
    • Views: 3,964
    02-15-2013, 03:46 PM Go to last post
  57. Cubic polynomial regression - Correlation coefficient

    How to compute the Correlation Coefficient of third degree polynomial regression? Using R and Statgraphics I only get R2, wich I believe that is...

    Started by Fernando Andreacci‎, 11-01-2011 05:56 PM
    • Replies: 0
    • Views: 3,963
    11-01-2011, 05:56 PM Go to last post
  58. Lightbulb Repeated Measures ANOVA (Split-Plot ANOVA) analysis of residuals

    Hi, how to process decent residual analysis in repeated measures? I know that the residuals should have normal distribution (altogether an in...

    Started by Martin Marko‎, 09-09-2013 12:33 PM
    anova, model checking, repeated measures, residual analysis, residuals
    • Replies: 5
    • Views: 3,960
    09-10-2013, 07:02 AM Go to last post
  59. linear regression -- the regressor X is random

    Hi, I am studying linear regression from the book titled, "Introduction to Linear Regression" by Montgomery. I am reviewing some previous...

    Started by foobar123‎, 11-26-2011 02:30 AM
    • Replies: 0
    • Views: 3,952
    11-26-2011, 02:30 AM Go to last post
  60. Logit versus Probit versus Linear Probability Coefficients

    Hi all, Fairly simple question... What exactly are the meanings of the coefficients in logit, probit, and linear probability models? I'm staring...

    Started by PoliticalEconomist‎, 11-27-2011 06:08 PM
    • Replies: 2
    • Views: 3,949
    11-28-2011, 04:49 PM Go to last post

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