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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Beta regression 1 and 0 values

    Hi there, I am trying to carry out beta regression but some of the realitzationsof my response varaible are 0 and 1 values and hennce I cannot...

    Started by Tomas_M‎, 05-28-2012 04:17 AM
    • Replies: 5
    • Views: 3,384
    05-28-2012, 08:47 AM Go to last post
  2. CARs from small sample(26): Which Regression is the best to perform?

    Dear All, I am new to this forum, but I am trying to become more and more specified in statistics for my Master Thesis (Erasmus University...

    Started by Bart Lips‎, 07-17-2012 08:12 AM
    event study, regression analysis, small sample size
    • Replies: 5
    • Views: 3,381
    07-23-2012, 02:13 PM Go to last post
  3. Can I use mediation with my data?

    Thanks for taking the time to read this in advance it is quite detailed, but I'm currently working on my psychology honours dissertation, and due to...

    Started by kristy008‎, 09-12-2009 10:08 PM
    • Replies: 2
    • Views: 3,379
    09-13-2009, 01:27 AM Go to last post
  4. Regression and metric space

    Hi, I have two independent variables X and Y and one dependent variable Z. X alone explains 45 percent of the variation in Z (Rsquare) and Y...

    Started by senbet‎, 10-29-2007 03:40 PM
    • Replies: 0
    • Views: 3,378
    10-29-2007, 03:40 PM Go to last post
  5. difference between 2x2-table and binary logistic regression

    Hello, I have to find out what is the (conceptual) difference between the tests. I don't really know what my means. I know they ARE different, but...

    Started by Lychee‎, 01-27-2012 11:42 AM
    • Replies: 4
    • Views: 3,376
    01-27-2012, 01:54 PM Go to last post
  6. Question Mediation Output with Process

    Hi, I am investigating a variable for its effect as a mediator with SPSS and Process but I have problems interpreting the output. First I...

    Started by StatStud‎, 01-10-2017 08:08 AM
    mediation, process
    • Replies: 0
    • Views: 3,374
    01-10-2017, 08:08 AM Go to last post
  7. linear regression Johnson Transformation

    If two predictor variables transformed by the Johnson Transformation (see Minitab or Johnson 1949) are used in separate linear regressions (assuming...

    Started by Brian707‎, 01-02-2013 02:19 AM
    linear regression, model comparison, r squared, transformation
    • Replies: 1
    • Views: 3,367
    01-02-2013, 10:59 AM Go to last post
  8. Exclamation How to use Likert Scale data in regression analysis?

    My knowledge about statistics is elementary and I would really appreciate some help or suggestions in solving my current problem. I am doing a...

    Started by irtiza104‎, 07-14-2015 03:40 PM
    • Replies: 9
    • Views: 3,366
    07-16-2015, 07:57 PM Go to last post
  9. what test should be used to tell if two regression lines are significantly different

    I have two lines in a x-y plot 1. observed migration distance (y) and predicted migration distance (x) (Y=0.95X+0.31, the slope coefficient and the...

    Started by helenekuo‎, 04-28-2013 07:47 AM
    linear, regression
    • Replies: 4
    • Views: 3,361
    04-29-2013, 02:26 PM Go to last post
  10. Linear Regression - Theory

    Hi Guys, I have some theoretical questions about regression models, I need an answer or true or false for the next few phrases.... 1. Leverage...

    Started by WeeG‎, 03-15-2011 05:47 AM
    • Replies: 3
    • Views: 3,359
    03-16-2011, 03:16 AM Go to last post
  11. Poisson Rate Regression: Offset?

    Hi! I'm comparing two groups on the # of hospitalizations they have in a 5 year period. Length of hospitalization stay is highly variable. For...

    Started by jamesmartinn‎, 06-20-2012 10:12 AM
    • Replies: 3
    • Views: 3,351
    06-21-2012, 07:11 AM Go to last post
  12. How to derive the r squared of an interaction term within a model

    Hi there, I am using Hayes' (2013) PROCESS macro to run a simple moderation, and I have the R-sq for the entire model. (M moderates the...

    Started by life-long learner‎, 02-28-2014 07:35 PM
    • Replies: 4
    • Views: 3,349
    03-03-2014, 03:18 PM Go to last post
  13. Categorical variables and interaction in MLR

    Would it be correct, to add in multiple linear regrression interaction between two categorical variables (i transformed them - dummy variavles) with...

    Started by Myron Tsisinskiy‎, 11-18-2011 04:40 AM
    categorical vairable, interaction term, multiple regression
    • Replies: 9
    • Views: 3,344
    11-19-2011, 04:14 PM Go to last post
  14. Is it a sensible practice to collapse categories of a predictor?

    I used logistic regression to run a model. An explanatory variable called 'region' has 3 levels (1, 2, 3). Level 3 is the reference group. The...

    Started by bncoxuk‎, 09-06-2011 07:24 PM
    • Replies: 2
    • Views: 3,342
    09-07-2011, 10:07 AM Go to last post
  15. Undergrad Logistic Decay Curve Fitting Problem

    Hi all, I am an undergrad currently working on ecology population models and I have run into a curve-fitting problem that has puzzled me for about a...

    Started by gcjohns‎, 07-27-2011 01:01 AM
    • Replies: 0
    • Views: 3,340
    07-27-2011, 01:01 AM Go to last post
  16. non-linear regression time response model

    Hi I need to choose a non linear regression model for, protein phosphorylation over time response, for this kind of data Is not like enzyme...

    Started by friveroll‎, 05-17-2012 04:22 PM
    non-linear, regresion analysis
    • Replies: 5
    • Views: 3,340
    05-19-2012, 09:05 AM Go to last post
  17. Reading Binary Logistic Regression results

    Hi! Need some help on Binary Logistic Regression results interpretation. 1) On Block 0: Begining Block i have overall percentage of 76%, but...

    Started by MarisaFernandes‎, 09-12-2013 06:43 PM
    logistic regression, results
    • Replies: 4
    • Views: 3,339
    09-13-2013, 08:10 PM Go to last post
  18. Multiple logistic regression intercept

    Hello guys and gals, I'm having a me***own trying to understand exactly what the intercept of a multiple logistic regression is telling me/ or if...

    Started by drewmac‎, 01-19-2012 12:40 AM
    • Replies: 3
    • Views: 3,338
    03-13-2012, 12:29 AM Go to last post
  19. Hierarchical Regression for Undergraduate Thesis

    Hi, I am working on an undergraduate thesis testing the effectiveness of incentives in the workplace. My director told me that I had to run a...

    Started by Catalyst48‎, 04-01-2013 07:18 PM
    • Replies: 6
    • Views: 3,337
    04-08-2013, 04:53 PM Go to last post
  20. Interaction Between Quadratic Variables in Logistic Regression

    Hi, I got some questions about assumption and interpretation of conditional logistic regression. It seems that two of my variables (let says N and...

    Started by STG‎, 04-18-2011 07:42 AM
    • Replies: 0
    • Views: 3,336
    04-18-2011, 07:42 AM Go to last post
  21. multiple comparisons with multiple regressions?

    Hi there, I'm hoping that someone can answer my query or point me in the direction of a reliable source to find out more. My question is - Is the...

    Started by meema‎, 05-26-2008 09:23 AM
    • Replies: 3
    • Views: 3,334
    05-27-2008, 08:36 AM Go to last post
  22. Dependent variable kurtosis

    How important is it for the Dependent Variable in a multiple regression to show normal distribution? I have read apparently contradictory...

    Started by Labtec‎, 05-03-2009 07:22 AM
    • Replies: 2
    • Views: 3,334
    05-03-2009, 06:01 PM Go to last post
  23. regression, interactions and centering how does it work?

    Hello everyone! So yesterday our prof explained to us that one of the reasons of why you "center" (meaning you substract the mean) from your...

    Started by will22‎, 04-16-2013 02:25 PM
    • Replies: 11
    • Views: 3,334
    04-19-2013, 07:46 PM Go to last post
  24. Poisson GLM with identity link function

    Hi, I'm trying to understand GLM, and was wondering why one should want to use an identity link function (for example with Poisson regression)....

    Started by Patrick‎, 08-26-2012 06:43 AM
    • Replies: 0
    • Views: 3,332
    08-26-2012, 06:43 AM Go to last post
  25. Prediction Limits

    Morning everyone. First thread, so take it easy on me. I am using a holt-winters times series to predict future call and transactional volume. ...

    Started by andrew01‎, 09-03-2008 06:48 AM
    • Replies: 0
    • Views: 3,330
    09-03-2008, 06:48 AM Go to last post
  26. how to describe the residual plots.. plz help

    Hello everyone... can you guys help me describe the residual plot.. whether it shows some sort of pattern of not and also whether it shows...

    Started by phantomneo‎, 03-21-2014 10:45 PM
    • Replies: 0
    • Views: 3,329
    03-21-2014, 10:45 PM Go to last post
  27. Regression Tree Help Using Rattle portion of R

    Hi all, I was wondering if someone could help me with an explanation of a Regression Tree I have created using the Rattle portion of R. I have...

    Started by glorifiedfisherman‎, 03-18-2014 08:59 PM
    • Replies: 4
    • Views: 3,328
    03-20-2014, 12:19 PM Go to last post
  28. Post Hoc or Contrasts ?

    Hi Guys, I have a theoretical question... Someone asked me today what's better to perform while using Analysis of variance: a prior analysis...

    Started by WeeG‎, 03-09-2011 02:46 AM
    • Replies: 1
    • Views: 3,327
    03-13-2011, 03:59 AM Go to last post
  29. My GRS statistic value is coming out to be weird.

    I am calculating GRS F-statistic on excel. Howeve rthe value is coming out to be either veyr big in trillions or too small. I guess the problem...

    Started by Shikha‎, 09-21-2011 06:48 AM
    • Replies: 0
    • Views: 3,327
    09-21-2011, 06:48 AM Go to last post
  30. Relative regression analysis?

    Hi, I am a new member of this thread. I need help with my hypothesis testing. Simply put, my hypothesis is " As A goes up, B and C go up but B...

    Started by rmittal‎, 05-03-2013 04:35 PM
    • Replies: 7
    • Views: 3,327
    05-06-2013, 01:29 PM Go to last post
  31. Multiple regression in the analysis of telephone calls

    Hi everyone, I'm new to multiple regression and I'm having a few concerns about my analysis and I could do with some advice. Firstly, the...

    Started by jassco‎, 02-10-2012 08:19 AM
    • Replies: 13
    • Views: 3,320
    02-13-2012, 07:51 PM Go to last post
  32. Do my data meet the assumptions for multiple linear regression?

    ~ There are no outliers in the standard residuals ~ Multicollinearity is not a concern ~ Independent errors are met (Durbin-Watson = 1.95) ~...

    Started by memomemootoo‎, 01-21-2014 02:09 PM
    • Replies: 7
    • Views: 3,317
    01-23-2014, 08:12 AM Go to last post
  33. Can RSS be decreased to 0 when dimension increases?

    Let's consider a simple example: I have two attributes X1 and X2, each has n values; response variable is Y. Using the two attributes together to...

    Started by ColdKing‎, 12-10-2011 12:59 PM
    dimension, regression, rss
    • Replies: 7
    • Views: 3,309
    12-11-2011, 01:07 AM Go to last post
  34. WLS Regression Weights

    I am working on a problem for which I need to do a multiple regression that involves a dependent variable and two independent variables. The...

    Started by elanmorin‎, 06-16-2012 02:08 PM
    • Replies: 0
    • Views: 3,306
    06-16-2012, 02:08 PM Go to last post
  35. 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: 3,304
    08-28-2012, 12:36 AM Go to last post
  36. Interpreting Logit Regression Output

    Hi, I'm running logit regression with systat, using fog as a dependent variable (fog did not occur or did, 0 or 1) against 115 predictors with all...

    Started by civilsurfer‎, 02-28-2011 02:08 PM
    • Replies: 0
    • Views: 3,302
    02-28-2011, 02:08 PM Go to last post
  37. Make predictions with standardized coefficients

    Hello, I've been struggling with a problem since a while, hopefully someone here could help me out. The problem: I want to use the...

    Started by Seko1987‎, 08-21-2012 02:21 PM
    coefficients, multiple regression, prediction, standardization
    • Replies: 4
    • Views: 3,298
    08-21-2012, 08:05 PM Go to last post
  38. Crossing point

    Dear all, My question is How to find out the crossing point of two curve in a graph by using r software? Mr.S.Sivarajah

    Started by Arumairajan‎, 08-01-2013 11:46 PM
    • Replies: 2
    • Views: 3,298
    08-21-2013, 09:11 AM Go to last post
  39. Relative impact of regressors on Y.

    A question I get asked a lot is, if we have these three predictors of Y, which of the 3 has the most, next most and least impact. I have tried...

    Started by noetsi‎, 01-29-2017 05:42 PM
    • Replies: 12
    • Views: 3,298
    08-07-2017, 07:31 PM Go to last post
  40. Independence of irrelevant alternatives test

    Hi, I'm looking for to test to see if my logistic regression model violates the independence of irrelevant alternatives assumption. The most often...

    Started by lmsava‎, 09-15-2011 10:47 AM
    • Replies: 0
    • Views: 3,291
    09-15-2011, 10:47 AM Go to last post
  41. Using Weight Of Evidence (WOE) in scoring

    Hi, I'm a newcomer to scorecards and I am trying to build one by performing univariate analysis to test for predictive strength of each of my...

    Started by RichH6109‎, 06-12-2012 07:04 AM
    • Replies: 0
    • Views: 3,289
    06-12-2012, 07:04 AM Go to last post
  42. Hausman test VS Mundlak model; choosing between fixed-effects and random-effects

    I am using panel data and I have to choose between fixed-effect and random-effect models. I run the Hausman test, the H0 (i.e., the difference in...

    Started by lukeskywalker84‎, 04-09-2014 10:05 AM
    fixed effects model, hausman, mundlak, random effects model
    • Replies: 0
    • Views: 3,289
    04-09-2014, 10:05 AM Go to last post
  43. regression, pairs of random variables

    with observations of an x variable, and a y variable whose expected values lie on a straight line, and whose residual errors are normally...

    Started by lhomer‎, 08-06-2006 12:25 PM
    • Replies: 0
    • Views: 3,287
    08-06-2006, 12:25 PM Go to last post
  44. Testing arbitrary contrasts based on summary statistics

    Following the discussion in this recent thread (Getting F statistic from multiple t-statistics?) and spunky's request therein, here is a neat trick...

    Started by Jake‎, 07-24-2012 03:20 AM
    • Replies: 3
    • Views: 3,287
    07-24-2012, 07:55 PM Go to last post
  45. confused trying to understand my SAS logistic regression output

    I am working on a public health masters thesis and need help trying to understand my SAS logistic regression output. I have a dataset of HIV cases...

    Started by greg30043‎, 09-27-2012 03:31 PM
    • Replies: 3
    • Views: 3,286
    09-28-2012, 05:09 PM Go to last post
  46. Business Stats, regression

    Hey everyone, Does anyone know the steps that minitab or any other stats software does to eliminate variables when doing forward selection,...

    Started by alias‎, 04-01-2011 05:37 PM
    • Replies: 0
    • Views: 3,285
    04-01-2011, 05:37 PM Go to last post
  47. Question Interpreting interaction between dummy IV and continuous moderator with log DV

    Hello Community, I urgently need your help to read the results of my regression analysis for my master thesis, which I need to hand in next week....

    Started by esprit88‎, 08-01-2013 04:19 PM
    continuous moderator, dummy, interaction effect, regression analysis
    • Replies: 13
    • Views: 3,285
    08-02-2013, 09:18 AM Go to last post
  48. Mediation Analysis with Dichotomous Outcomes - Effect Size for Indirect Effect

    Hello, I would like to run a mediation analysis where my predictor (X) is continuous, my mediator (M) is continuous, but my outcome variable (Y)...

    Started by lespullman‎, 04-14-2014 02:39 PM
    mediation; binary outcome
    • Replies: 0
    • Views: 3,284
    04-14-2014, 02:39 PM Go to last post
  49. regression and correlation

    Hello, correlation between two variables is positive (and significant) and then when I put it in regression analysis it becomes negative predictor...

    Started by Vanja‎, 04-08-2011 03:09 AM
    • Replies: 1
    • Views: 3,283
    04-08-2011, 05:15 AM Go to last post
  50. compare Spearman's correlations

    Dear all, I performed several Spearman's correlation tests between the same independent variable and different dependent ones. All the...

    Started by marco77‎, 12-05-2011 10:29 AM
    • Replies: 2
    • Views: 3,283
    12-06-2011, 05:07 AM Go to last post
  51. Regression sample size

    Members, Please let me know if i can do a regression analysis for a sample size 40 with 8 predictor variables?

    Started by chella‎, 01-20-2013 01:34 PM
    • Replies: 5
    • Views: 3,282
    01-24-2013, 05:24 AM Go to last post
  52. Obtain the least squares estimator b1 of B1.

    Given the regression model Yi=B1Xi + ei for i=1,2,...,n. Is the estimator unbiased? So this represents the simple model with B0=0, but I'm not...

    Started by TheRealAct‎, 09-22-2013 12:09 AM
    • Replies: 6
    • Views: 3,281
    09-23-2013, 04:32 AM Go to last post
  53. Logistic regression: how to get ORs and CIs for non-included variables

    I'm working on a modeling project using logistic regression with forward selection. I would like to be able to determine the odds ratios and...

    Started by madformath‎, 11-30-2013 11:29 AM
    • Replies: 8
    • Views: 3,279
    12-01-2013, 09:18 PM Go to last post
  54. Ridge Regression Estimators' properties...

    Hi there I'm studying about Ridge Regression Estimator(RRE) and have a question. There are 3 properties of RRE. First, RRE can be derived by...

    Started by subspaces‎, 10-30-2011 11:36 AM
    • Replies: 0
    • Views: 3,277
    10-30-2011, 11:36 AM Go to last post
  55. normality assumption in regression: THE FINAL ANSWER!!!

    ok, maybe it's not *the* final answer, but here's a theory of where this may be coming from. ever since noetsi started asking this question about...

    Started by spunky‎, 06-27-2013 04:31 AM
    • Replies: 11
    • Views: 3,276
    07-02-2013, 09:48 AM Go to last post
  56. Generalized Cross Validation

    Hello Guys, I'm runing MATLAB code on SVD with roughness penalties. When I use GCV to choose the parameter, I have a question regarding the...

    Started by FantasyCC‎, 04-05-2011 08:04 AM
    • Replies: 0
    • Views: 3,273
    04-05-2011, 08:04 AM Go to last post
  57. Partialling out covariates

    Hi, I have a situation where I have Y_it = a_i + dT_it + X'_itB + e_it T is multi-valued and exogenous. It is correlated with some of the...

    Started by andrewcd‎, 12-20-2011 10:53 AM
    • Replies: 1
    • Views: 3,272
    12-20-2011, 05:18 PM Go to last post
  58. Variance of error

    With the equation yi = B0 + B1xi + ei Does anyone know what the variance of ei_hat is suppose to equal? So far I have tried to split it the ei...

    Started by Cookie‎, 08-08-2011 01:15 AM
    • Replies: 0
    • Views: 3,267
    08-08-2011, 01:15 AM Go to last post
  59. Linear Model Prediction

    I'm working on a linear model that looks like: Price = B0 + B1(Gender) + B2(Age) + B3(Credit Type) + B4(Home) ... The predictior is price, and...

    Started by amathew‎, 12-20-2011 05:56 PM
    • Replies: 13
    • Views: 3,266
    12-21-2011, 11:06 AM Go to last post
  60. What test if no linearity

    Dear forum members, I am currently struggling with my research about boardmembers and their influence on the strategy. From other articles I...

    Started by Jdijkers‎, 11-18-2013 10:14 AM
    2 Pages
    1 2
    • Replies: 20
    • Views: 3,265
    11-18-2013, 04:15 PM Go to last post

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