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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Post What is the appropriate analysis test?

    Hello everyone, I'm new to this forum. Please be kind to me. ^-^ I want to know what analysis test I can use for the following: Research...

    Started by jmcalimag‎, 04-04-2013 02:31 PM
    • Replies: 0
    • Views: 833
    04-04-2013, 02:31 PM Go to last post
  2. Nested continuous Regression conditioned on dummy

    Hi, Does anyone know what model to use for the following issue: I would like to estimate transaction size (continuous dependent variable) using...

    Started by 3ha0t1cdy‎, 04-02-2013 11:59 PM
    logit, nested, regression, stage
    • Replies: 2
    • Views: 2,164
    04-03-2013, 06:19 PM Go to last post
  3. Strange results for logistic regression analysis

    Hi there, I'm having a problem for a while now, and I've asked several people who studied statistics specifically but they are not able to explain...

    Started by bramv‎, 03-08-2013 05:41 AM
    • Replies: 14
    • Views: 3,512
    04-03-2013, 12:20 PM Go to last post
  4. Question Panel Data: Conducting N time-series regressions and averaging coefficients

    Hi, I stumbled upon a special regression method in a published paper (A+ journal) that I hadn't heard before. In dealing with a panel data set, the...

    Started by Steve06‎, 05-23-2011 12:32 AM
    fixed effects, linear regression, panel, paper
    • Replies: 3
    • Views: 3,681
    04-02-2013, 10:07 PM Go to last post
  5. GARCH model with insignificant arch/garch terms

    Hello, I was wondering, if we run a regression where we also specify a GARCH(1,1) for the error variance, and we find that both the arch and garch...

    Started by rocker‎, 04-02-2013 10:00 AM
    • Replies: 2
    • Views: 2,914
    04-02-2013, 12:48 PM Go to last post
  6. univariate vs multivariate

    Hi, I have a question about interpreting univariate vs. multivariate (linear) regression. When I'm reading journal articles often both approaches...

    Started by williaml‎, 01-06-2009 08:58 PM
    • Replies: 5
    • Views: 40,743
    04-02-2013, 05:41 AM Go to last post
  7. Variance error of estimate

    Hi everyone! I need help with this question: The variance of Y is 400 and the correlation between X and Y is 0.50. a) What is the variance error...

    Started by twinkiestats‎, 04-01-2013 12:36 PM
    • Replies: 0
    • Views: 1,597
    04-01-2013, 12:36 PM Go to last post
  8. Non constant variance in residuals?

    Hi, When doing Linear Regression or Generalised Linear Modelling, and the residuals show non constant variance, how do you remove it? For example,...

    Started by amsbam1‎, 03-27-2013 01:28 PM
    • Replies: 3
    • Views: 4,718
    03-28-2013, 08:57 PM Go to last post
  9. Event Study where event is correlated with index

    Hello, I am trying to conduct an event study using the traditional market model: StockReturn = Constant + IndexReturn + DummyVariable + Error ...

    Started by rocker‎, 03-25-2013 06:39 AM
    • Replies: 3
    • Views: 1,519
    03-28-2013, 08:54 PM Go to last post
  10. Help with understanding logit coefficient

    Hi everyone, I'm very new to statistics and I would very much appreciate any help you can give me in understanding the coefficients in a logit model....

    Started by EmmaWalfer‎, 03-23-2013 04:10 PM
    • Replies: 7
    • Views: 1,959
    03-28-2013, 10:19 AM Go to last post
  11. Multiple regression - assumptions

    Hi, I performed experiments on two plant species, growing them together in mixtures. I repeated this experiment in 4 nutrient concentrations. I...

    Started by joey‎, 03-26-2013 08:58 AM
    • Replies: 9
    • Views: 2,376
    03-28-2013, 06:58 AM Go to last post
  12. Regression with arctan function

    Hello, I am currently working on a prepayment model for mortgage loans. For this I'd like to use a modified version of the Richard & Roll model....

    Started by fanusi‎, 03-28-2013 05:01 AM
    • Replies: 0
    • Views: 3,514
    03-28-2013, 05:01 AM Go to last post
  13. Alternatives to logistic regression when the number of cases is low

    Hi All I got involved in my first foray into logistic regression, but have come to realize that I probably can't use it. Let me tell you about my...

    Started by kimwg‎, 03-26-2013 05:10 PM
    binomial, chi-square, fisher's exact test, multiple comparisons, sample size
    • Replies: 4
    • Views: 2,204
    03-27-2013, 08:43 AM Go to last post
  14. step change

    Fir a step change model, is it a linear model ?

    Started by sihem‎, 03-27-2013 06:31 AM
    linear, model, step function
    • Replies: 0
    • Views: 1,103
    03-27-2013, 06:31 AM Go to last post
  15. 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: 4,076
    03-25-2013, 10:10 PM Go to last post
  16. Error question

    Okay, perhaps a silly question. When it is actually appropriate to add a normal error term to an equation that you are about to estimate? Or is...

    Started by ItPaysTheBills‎, 03-25-2013 08:45 PM
    • Replies: 0
    • Views: 1,251
    03-25-2013, 08:45 PM Go to last post
  17. Multiple Regression with negative constant for price

    Hi there, I am carrying out a project study, in which I am studying the relationship between the price of property in three regions in the UK along...

    Started by sajin‎, 03-24-2013 04:40 AM
    • Replies: 2
    • Views: 8,412
    03-25-2013, 11:11 AM Go to last post
  18. Unhappy Assessing SSE(sum of squared errors)?

    Hello, I can't figure out how to solve this question: Consider these summary statistics for a random sample: Mean of x=20 Mean of y=10...

    Started by Enricus‎, 03-24-2013 12:04 AM
    • Replies: 3
    • Views: 2,031
    03-24-2013, 03:27 PM Go to last post
  19. simple regression line graph

    anyone can help me briefly explain this graph? i cant understand the graph pattern

    Started by ray4542‎, 03-24-2013 04:33 AM
    • Replies: 0
    • Views: 1,085
    03-24-2013, 04:33 AM Go to last post
  20. IV analysis, log-linear model, is it ok?

    Hi guys, I have a problem I hope someone can help me with! The thing is, I am doing an IV analysis, 2SLS. When I do the first stage and regresses...

    Started by RToss‎, 03-23-2013 09:23 AM
    • Replies: 0
    • Views: 1,319
    03-23-2013, 09:23 AM Go to last post
  21. Talking Observed versus Expected Slope Comparison

    Hello, I am performing an analysis (for dissertation project) where I am comparing the sum of branch lengths from phylogenetic trees reconstructed...

    Started by CrystalH‎, 03-22-2013 01:28 PM
    phylogenetic diversity, regression analysis, slope
    • Replies: 2
    • Views: 3,580
    03-22-2013, 07:57 PM Go to last post
  22. Confidence limits for logistic regression equation

    I have generated a logistic model for a disease status Y (unaffected-affected) using several independent variables on a very large (600K+) dataset. I...

    Started by slcjim‎, 03-21-2013 11:29 PM
    confidence intervals, logistic regression
    • Replies: 0
    • Views: 3,176
    03-21-2013, 11:29 PM Go to last post
  23. Post How to find relationship of variables?

    Hi, Here is my problem: I have 3 variables with data as below: ID Went_Out_date returned?(1=yes, 0=No) 1 3/20/2012 1...

    Started by Urbi‎, 03-20-2013 06:47 PM
    • Replies: 0
    • Views: 1,187
    03-20-2013, 06:47 PM Go to last post
  24. Accuracy of prediction?

    Right, I've got some data for variable X and variable Y in 2002. Using Simple Linear Regression, I've made a model which uses variable X to...

    Started by fdsa ytre‎, 03-20-2013 04:58 PM
    • Replies: 1
    • Views: 1,567
    03-20-2013, 05:51 PM Go to last post
  25. Logistic regression diagnostic questions

    I have a set of 42 variables which I am trying to determine the relative importance of. Well I already did but now I am trying to determine if...

    Started by noetsi‎, 03-18-2013 09:41 AM
    2 Pages
    1 2
    • Replies: 19
    • Views: 5,634
    03-20-2013, 10:40 AM Go to last post
  26. Which regression model to use with skewed & ordinal data?

    I'm a bit stucked and just wondering about which regression technic to use with my dependent variable at hand. Respondents were asked to provide a...

    Started by Chris_J‎, 03-19-2013 10:13 AM
    regresion
    • Replies: 3
    • Views: 4,267
    03-19-2013, 04:16 PM Go to last post
  27. Year dummies in Fixed Effects estimation with panel data

    Quick question. I'm working with an unbalanced international dataset. I'm using fixed effects because (at least mostly because) I want to allow for...

    Started by ewalcott‎, 03-19-2013 08:40 AM
    dummy variables, fixed effects, panel data
    • Replies: 0
    • Views: 2,608
    03-19-2013, 08:40 AM Go to last post
  28. Variable is significant in OLS regression, but insignificant in Probit marginal effec

    I am investigating the determinants of wage. With the dataset I ran a pooled OLS regression, and a Probit marginal effects regression looking at...

    Started by Falc‎, 03-18-2013 04:35 AM
    • Replies: 2
    • Views: 2,875
    03-18-2013, 02:31 PM Go to last post
  29. Passing-Bablok regression

    Hi all, Does anyone knows how to perform Passing-Bablok regression in SAS? I have never done it do the SAS code (with or withoutan example)...

    Started by szm‎, 03-18-2013 01:56 PM
    passing-bablok regression, regresion
    • Replies: 0
    • Views: 5,061
    03-18-2013, 01:56 PM Go to last post
  30. basic econometrics

    explain the differences for the following paired terms with appropriate examples. (1)log-lin model and lin-log model (2)cross sectional data and...

    Started by waily‎, 03-18-2013 10:38 AM
    • Replies: 2
    • Views: 2,524
    03-18-2013, 11:11 AM Go to last post
  31. Nested or Repeated measures analysis for ecology data?

    This is a refinement of an earlier question I asked. ...

    Started by Cheffy‎, 03-01-2013 12:16 PM
    • Replies: 3
    • Views: 4,232
    03-18-2013, 11:03 AM Go to last post
  32. Logistic regression help

    Hello, I have performed some logistic regression analysis and I was wondering if someone can tell me if I've done it and interpreted it...

    Started by terenceextra‎, 03-16-2013 10:34 AM
    • Replies: 1
    • Views: 1,767
    03-18-2013, 09:30 AM Go to last post
  33. Help with regression please

    Hi, sorry if this post is confusing, but I'll try not to babble, for my FYP I am doing a pair of questionnaires, one has a set of questions which are...

    Started by pinklilith‎, 03-17-2013 05:31 PM
    • Replies: 3
    • Views: 1,449
    03-18-2013, 08:29 AM Go to last post
  34. Airline Stock Regression

    Hi guys, I'm trying to run a regression with daily airline stock returns as dependent variable. I've included jet fuel price and the stock market...

    Started by rocker‎, 03-18-2013 08:01 AM
    • Replies: 0
    • Views: 1,706
    03-18-2013, 08:01 AM Go to last post
  35. Intuitive Serial Correlation

    Hi, could anyone tell me if they think this graph of residuals against time shows potential signs of positive or negative serial correlation. ...

    Started by GGT‎, 03-17-2013 09:37 AM
    • Replies: 4
    • Views: 2,223
    03-17-2013, 03:36 PM Go to last post
  36. Hosmer Lemeshow goodness of fit test

    One of the authors I consult a lot with in logistic regression is really down with Hosmer Lemeshow goodness of fit test. He argues it has low power...

    Started by noetsi‎, 03-15-2013 04:42 PM
    • Replies: 1
    • Views: 2,641
    03-15-2013, 08:51 PM Go to last post
  37. bivariate regression question

    Hi everyone: I am have conducted bivariate regression analysis to examine the effect of: an (x) independent variable, age (nominal) on a (y)...

    Started by parsec2011‎, 03-15-2013 12:46 AM
    • Replies: 5
    • Views: 2,689
    03-15-2013, 02:52 PM Go to last post
  38. Could you help me understand my regression analysis?

    Hello All, I think i have a pretty good understanding of the 3 regression analysis that i've done. However, i just wanted to confirm them with some...

    Started by joshnathan‎, 03-14-2013 05:58 PM
    • Replies: 1
    • Views: 2,075
    03-15-2013, 10:04 AM Go to last post
  39. Interpreting Marginal Effect - Probit

    I am using a probit model, where one of the variables is log(income). I calculated the (average) marginal effect and it resulted in 0.03. I am a...

    Started by zahg‎, 03-15-2013 05:37 AM
    • Replies: 1
    • Views: 3,114
    03-15-2013, 08:08 AM Go to last post
  40. Can I transform the principal components...?

    Hi all. I am using PCA to generate PCs and then using them as independent variables in regression. I added an extra data-step after PCA which is...

    Started by szm‎, 03-14-2013 01:48 PM
    pca, regression, transformation
    • Replies: 0
    • Views: 1,832
    03-14-2013, 01:48 PM Go to last post
  41. Large logit coefficient - what it means

    I am constructing a logit model with 6 explanators, trying to predict outcomes of hockey matches using odds (the variable I am referring to below)...

    Started by neil1690‎, 03-11-2013 10:41 AM
    logit model
    • Replies: 12
    • Views: 8,153
    03-12-2013, 06:06 PM Go to last post
  42. Question Comparing Multiple Regression across multiple groups

    I am looking at 4 different predictors of eating disorders in 4 different groups of participants (Caucasians, Af Americans, Lations, and Asian...

    Started by dee515‎, 03-12-2013 12:31 PM
    • Replies: 1
    • Views: 2,642
    03-12-2013, 02:58 PM Go to last post
  43. Help with sensibility analysis (event ticketing and advertising influence)

    Hi everybody. I have a task to find out how usage of (advertising investment, PR etc.) different media channels influence on sales of tickets for...

    Started by ynos‎, 03-12-2013 12:46 PM
    • Replies: 0
    • Views: 2,196
    03-12-2013, 12:46 PM Go to last post
  44. Interpreting SAS Output for Regression

    Hi-- I am a complete newbie to statistics, so please talk to me as though I am a six year old child when you are explaining things to me :) I had...

    Started by SophiePaquin‎, 03-10-2013 11:45 PM
    • Replies: 4
    • Views: 13,613
    03-12-2013, 12:12 PM Go to last post
  45. Longitudinal analysis across age, when participants are all different ages from T1

    Hi all! I'm looking to do a longitudinal analysis to see how a variable changes across two time points. The thing is, from T1, my participants are...

    Started by jessysteppy‎, 03-12-2013 11:21 AM
    different ages, longitudinal, regression, two time points
    • Replies: 0
    • Views: 2,476
    03-12-2013, 11:21 AM Go to last post
  46. Transforming non normal data

    Hi, Your help would be highly appreciated Im trying to develop statistical models to predict soil salinity for three sites from field data which...

    Started by Amal‎, 03-11-2013 11:14 PM
    • Replies: 1
    • Views: 2,420
    03-12-2013, 10:49 AM Go to last post
  47. regression VS canonial correlation analysis

    hello i need to know the main difference between the multivariate multiple regression and canonical correlation analysis...

    Started by osamahamza‎, 03-11-2013 03:14 AM
    • Replies: 3
    • Views: 2,730
    03-12-2013, 04:18 AM Go to last post
  48. Multiple regression analysis for 3 groups

    Hi I am doing a multiple regresion analysis for my project. If I have 3 groups which are nominal data (nationality: PL, ENG, and PL who moved to...

    Started by ilona‎, 03-07-2013 04:48 PM
    • Replies: 10
    • Views: 3,118
    03-10-2013, 05:01 PM Go to last post
  49. Non-linear regression-N shape-turning points

    Hi! I have regression forumula Q = a + β1MO + β2MO2 + β3MO3 + ε (it is:MO squared for MO2 etc.) so it is cubic. I solve problem of a regression...

    Started by johnny009‎, 03-10-2013 11:00 AM
    • Replies: 0
    • Views: 2,030
    03-10-2013, 11:00 AM Go to last post
  50. How Does One Interpret Interactions in Logistic Regression Using SPSS?

    Hello Everyone, I am definitely not stats saavy and have been able to run a logistic regression with the help of a manual. The manual doesn't...

    Started by Student T‎, 03-04-2013 10:50 PM
    • Replies: 4
    • Views: 16,549
    03-10-2013, 09:39 AM Go to last post
  51. bivariate analysis versus univariate logistic regresssion analysis

    Hello, I have done a bivariate analysis and univariate logistic regresion analysis on the same data. Now both gave the same results (OR, 95%CI),...

    Started by noob‎, 03-09-2013 03:18 PM
    • Replies: 0
    • Views: 2,930
    03-09-2013, 03:18 PM Go to last post
  52. Violation of linearity assumption

    Hi, I'm a beginner at statistics. I'm doing a simple linear regression and I have a scatterplot of the residuals versus the predicted values and I...

    Started by Elodin‎, 03-07-2013 03:15 PM
    • Replies: 10
    • Views: 4,693
    03-09-2013, 10:47 AM Go to last post
  53. Multiple Linear Regression: Outlier

    Ok folks, so I am doing a multiple linear regression. I am not a statistics expert by any means, and it is part of a psychology report. The last time...

    Started by Rik398‎, 03-06-2013 01:13 PM
    • Replies: 4
    • Views: 2,408
    03-07-2013, 02:16 PM Go to last post
  54. Linear Probability Model

    Hi guys, Just wanted to check because the text books I am using are do not explicitly state it... It does not make sense to rely on the t-stats...

    Started by zahg‎, 03-07-2013 02:03 PM
    • Replies: 0
    • Views: 2,641
    03-07-2013, 02:03 PM Go to last post
  55. Need help interpretering results

    Hello, I was wondering if anyone could help me with a few small questions! First of all i'm conducting a research and I need to compare the...

    Started by rikuge‎, 03-05-2013 04:54 AM
    • Replies: 1
    • Views: 1,822
    03-05-2013, 12:27 PM Go to last post
  56. Questions on which stats to use & sigmaplot for Logistic Regression

    Hi Everyone, This is my first time on the forum. I have been having problems deciding on what test to use for my data and how to input the data...

    Started by Bennice‎, 03-04-2013 07:59 PM
    • Replies: 5
    • Views: 4,263
    03-05-2013, 12:09 PM Go to last post
  57. Need help interpreting regression analysis comparison results

    Hi, I am using simple linear regression analysis to compare two different population groups' development over time (one dependent variable). I am...

    Started by littlewonder‎, 03-02-2013 06:47 PM
    comparison, interpretation, presentation, regression analysis, reporting
    • Replies: 2
    • Views: 2,559
    03-04-2013, 04:23 PM Go to last post
  58. Post [R] Between subjects repeated measures ANOVA help. Level: Novice.

    Dear community, I am fairly new to the field of statistics and R and I apologise if my problem seems to be too basic. In my research I have...

    Started by pickle‎, 02-17-2013 09:25 AM
    3 Pages
    1 2 3
    • Replies: 40
    • Views: 9,147
    03-02-2013, 09:23 PM Go to last post
  59. Is Unemployment Rate important as a regressor in a cross sectional analysis?

    Hello, I am doing a regression on potential sales and I want to identify the demand drivers. I was wondering if Unemployment rate could be one of...

    Started by john.volt‎, 02-25-2013 03:46 AM
    cross sectional
    • Replies: 2
    • Views: 2,424
    03-01-2013, 09:08 PM Go to last post
  60. Need advice on methods to assess nested random effects ecology data

    Hi everyone, I am a PhD student working in forestry/ecology. More specifically, I am looking at the effects of harvesting on soil nutrient pools....

    Started by Cheffy‎, 02-26-2013 01:36 PM
    • Replies: 1
    • Views: 2,231
    03-01-2013, 12:17 PM Go to last post

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