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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Probit regression with misclassified binary dependent variable in R

    Is there a generalized linear mixed-effects model implementation for R that could handle misclassified binary data? Unless I have overlooked...

    Started by jackmendoza‎, 01-16-2015 09:35 AM
    • Replies: 0
    • Views: 972
    01-16-2015, 09:35 AM Go to last post
  2. Simple Linear Regression - Many Data Sets

    We have to predict a future value for one variable based solely on past instances of that variable. This has to be done for many different data...

    Started by Firewoofie‎, 01-15-2015 02:50 PM
    linear regression, many data sets, one variable regression
    • Replies: 0
    • Views: 746
    01-15-2015, 02:50 PM Go to last post
  3. Finding a patch in a series.

    Hello! I wonder if anybody can help me. I am working on a personal project and I want to find the best match for a patch in a larger series. I...

    Started by yaraeovento‎, 01-15-2015 01:11 AM
    cross correlation, matching data
    • Replies: 0
    • Views: 759
    01-15-2015, 01:11 AM Go to last post
  4. Do I need to control for Type 1 errors?

    Hi guys, the situation I have is, a reviewer has asked me to reduce my mediation model (MPLUS) as he says I have too many tests going on. In fairness...

    Started by DrFurbs‎, 01-10-2015 02:31 PM
    • Replies: 5
    • Views: 1,742
    01-14-2015, 03:09 PM Go to last post
  5. Regression: cor(X1, Yhat) = cor(X1, Y)/R How to show?

    Hello everyone. I am taking a class in regression that's way over my head. We are working with the sample model Y = b0 + b1X1 + b2X2 + e. In it I am...

    Started by will22‎, 01-13-2015 04:58 PM
    • Replies: 3
    • Views: 1,865
    01-14-2015, 02:02 AM Go to last post
  6. Comparing different, related measures of the same thing to see which is most sig?

    I want to start out saying my stat knowledge is weak. I am writing my Masters thesis and I'm struggling to understand how to get the answers I want....

    Started by OkieSpladle‎, 01-10-2015 04:38 PM
    • Replies: 1
    • Views: 853
    01-11-2015, 02:17 AM Go to last post
  7. SE MultiLevel Models

    Not accounting for dependence in observations and not using the appropriate cross-sectional multilevel model results in parameter estimate's standard...

    Started by hlsmith‎, 01-10-2015 10:56 AM
    biased standard error
    • Replies: 1
    • Views: 817
    01-10-2015, 09:46 PM Go to last post
  8. Unbalanced panel dataset

    I need some clarification on how unbalanced panel data should be organized. For instance, suppose you have sample of total N products' prices and...

    Started by john_f‎, 01-10-2015 07:25 PM
    dataset
    • Replies: 0
    • Views: 756
    01-10-2015, 07:25 PM Go to last post
  9. Data problem

    I need a little help about a guidance how to represent "unlimited" as a value in regression variable. For example, some phone plans includes...

    Started by john_f‎, 01-09-2015 05:36 PM
    regresion
    • Replies: 2
    • Views: 976
    01-09-2015, 07:34 PM Go to last post
  10. Appropriate Regression Method?

    Hi guys, I'm relatively new to statistics, and I'm searching for an answer as to which regression method would be most appropriate for the problem...

    Started by MMack‎, 01-05-2015 11:22 PM
    • Replies: 4
    • Views: 1,464
    01-07-2015, 06:39 PM Go to last post
  11. Question about sampledistribution

    Hi, I have a question I was hoping someone could answer me. It goes as follows: The correlation r between two variables x_1 and x_2 equals 0.33....

    Started by WCTStats‎, 01-07-2015 10:50 AM
    • Replies: 3
    • Views: 889
    01-07-2015, 04:36 PM Go to last post
  12. Bayesian regression

    it's a actually an informatics math related question. But i want to start here to get a first opinion. As a software engineer and cryptographer, I'm...

    Started by ethomas‎, 01-07-2015 01:16 PM
    • Replies: 0
    • Views: 782
    01-07-2015, 01:16 PM Go to last post
  13. (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: 2,263
    01-06-2015, 06:49 AM Go to last post
  14. non-significant predictor became significant after including additional predictor?

    Hi everyone, I have a quick question concerning a program I am having in multiple regression. I have a working full mediation model, that is,...

    Started by jiaxiking‎, 01-04-2015 05:55 PM
    • Replies: 10
    • Views: 2,542
    01-05-2015, 09:37 PM Go to last post
  15. Variance inflation and interactions between variables?

    Hello everyone I am having trouble interpreting some of my results. I am using logistic regression to infer a model based on measured data....

    Started by enur‎, 08-03-2012 09:54 AM
    categorical data, gvif, interaction terms, logistic regression, vif
    • Replies: 8
    • Views: 12,191
    01-05-2015, 01:34 PM Go to last post
  16. multicollinearity of interaction term in binary logistic regression

    Hello, I would like to conduct a Binary Logistic Regression Analysis with a regression model containing a nominal 0/1-dummy variable (D) a...

    Started by anna_84‎, 01-05-2015 11:20 AM
    • Replies: 2
    • Views: 2,122
    01-05-2015, 01:20 PM Go to last post
  17. 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: 1,496
    01-03-2015, 08:13 AM Go to last post
  18. Question Polynomial regression - Degree problem

    Hello, I would like to ask that how do I decide exactly what degree polynomial to use in my regression? I have attached the sample file. ...

    Started by Villalobos‎, 12-30-2014 03:37 PM
    • Replies: 9
    • Views: 2,119
    01-03-2015, 06:52 AM Go to last post
  19. How to find: Best fit regression Model

    Thank you so much in advance!

    Started by Niklas1392‎, 01-03-2015 06:21 AM
    best fit, linear regression, regression analysis
    • Replies: 0
    • Views: 909
    01-03-2015, 06:21 AM Go to last post
  20. Dealing with outliers

    We have this discussion from time to time, but it has become more pertinant to me now... Before I begin I should note that I am not really interested...

    Started by noetsi‎, 12-30-2014 10:09 AM
    • Replies: 7
    • Views: 2,588
    12-30-2014, 10:16 PM Go to last post
  21. Importance of bias in estimators

    I always thought that bias was the central issue in an estimator. The one thing you had to avoid above all else and the gold standard to evaluate the...

    Started by noetsi‎, 12-30-2014 01:32 PM
    • Replies: 12
    • Views: 2,162
    12-30-2014, 02:46 PM Go to last post
  22. Measurement error

    An econometrician I am reading notes that if the IV are measured with error the least square estimators are biased towards zero. I assume, I doubt...

    Started by noetsi‎, 12-30-2014 09:40 AM
    • Replies: 4
    • Views: 762
    12-30-2014, 02:34 PM Go to last post
  23. Multiple linear regression vs logistic regression

    I am not a statistician myself, and haven't done regressions for very long time and have a basic question. I need to do multiple regression for...

    Started by EricaW‎, 12-28-2014 03:30 PM
    • Replies: 5
    • Views: 1,739
    12-29-2014, 08:18 PM Go to last post
  24. External dataset validation of a binary logit model

    Hello all, i have developed a prognostic model using binomial logistic regression. Now i want to validate it in an external dataset. The standard...

    Started by Sheetal‎, 12-27-2014 08:30 AM
    logit validation
    • Replies: 1
    • Views: 991
    12-27-2014, 08:43 AM Go to last post
  25. 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: 1,728
    12-27-2014, 06:05 AM Go to last post
  26. Logistic Regression

    Hii! I have some, I guess, pretty basic questions regarding logistic regression. I collected data and my dependent variable is, whether...

    Started by Lors‎, 12-26-2014 07:52 AM
    complete separation, logistic regression, spss
    • Replies: 1
    • Views: 1,049
    12-26-2014, 02:42 PM Go to last post
  27. 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: 1,604
    12-26-2014, 02:21 PM Go to last post
  28. Thumbs up Using regression to compensate for matching?

    Suppose I am using four groups for a study: South Asian patients, n=41 First Nation patients, n=48 Arabic patients, n=26 South Asian controls,...

    Started by muaaman‎, 12-25-2014 10:05 AM
    compensation, controls, matching, patients, regression
    • Replies: 5
    • Views: 1,280
    12-26-2014, 04:51 AM Go to last post
  29. Endogenous variable

    Hi, can someone please explain in a simple way what does it mean "variable is correlated with the error term"? Thanks.

    Started by john_f‎, 12-21-2014 04:40 PM
    endogenous, regression, variable
    • Replies: 3
    • Views: 1,426
    12-22-2014, 05:05 AM Go to last post
  30. Is there a need to include fixed effects when assessing multicollinearity VIFs?

    I am currently in the progress of performing multicollinearity diagnostics for a logistic regression model using tolerance and VIF calculations based...

    Started by SuppaiKamo‎, 12-20-2014 12:44 PM
    fixed effects model, logistic regression, multicollinearity, regression, regression assumption
    • Replies: 0
    • Views: 1,128
    12-20-2014, 12:44 PM Go to last post
  31. count data with no zero counts, Poisson?

    Well I appear to have zero deflate data. I will likely treat it as multilevel with clusters, but I was wondering if there was a count approach (e.g.,...

    Started by hlsmith‎, 12-19-2014 08:26 PM
    • Replies: 3
    • Views: 1,629
    12-19-2014, 10:45 PM Go to last post
  32. Why does the coefficient change sign when another variable is added to the OLS model?

    Dear all, I am trying to run an OLS regression in Stata 13, with log of per capita calorie as my dependent variable and age and years of education...

    Started by monzur‎, 12-19-2014 03:53 PM
    • Replies: 7
    • Views: 4,449
    12-19-2014, 04:27 PM Go to last post
  33. Is this logit model a multilevel model, and what is the correct way to model it?

    I am analyzing a sample of about 6000 actions carried out by about 500 multinational companies in about 80 countries during a 6 year period. Actions...

    Started by SuppaiKamo‎, 12-19-2014 01:35 PM
    logistic regression, logit, multilevel analysis, multilevel model, multilevel modeling
    • Replies: 0
    • Views: 1,125
    12-19-2014, 01:35 PM Go to last post
  34. Regression Using Likert Scales (Total Scores)

    I conducted a survey that consisted of 5 different likert scales. I totaled the scores for each scale. I would like to know if the total scores of 4...

    Started by nelson5520‎, 12-18-2014 10:45 AM
    likert scale, multiple regression, ordinal logistic reg, regression analysis
    • Replies: 3
    • Views: 1,549
    12-18-2014, 02:17 PM Go to last post
  35. Goodness of fit measure for a MNL model

    Hello! I have carried out MNL regression with the same model among different samples and I now need to compare the results against each other. In...

    Started by Jüri‎, 12-18-2014 11:31 AM
    goodness of fit, mnl, mnl model
    • Replies: 1
    • Views: 960
    12-18-2014, 11:40 AM Go to last post
  36. significance intepretation DOLS

    the insignificant slopes in Time series regression become significant in DOLS. what general explanation can provide? other than- the use of...

    Started by chandana‎, 12-18-2014 10:59 AM
    • Replies: 0
    • Views: 761
    12-18-2014, 10:59 AM Go to last post
  37. Bounded or unbounded? Which regression?

    Hi, I have to do a regression analysis with a dependent variable which ranges from -5 to 12. Its distribution is given below. Can anybody suggests...

    Started by sant2910‎, 06-28-2012 08:39 AM
    regression, unbounded
    • Replies: 1
    • Views: 2,766
    12-18-2014, 10:19 AM Go to last post
  38. proving regression with dummy variables gives same estimates as separate models

    See attachment for problem description: To prove this I started by using: vector of Beta estimates for category k = , matrix of estimates for...

    Started by statsmeister‎, 12-16-2014 01:00 PM
    • Replies: 0
    • Views: 889
    12-16-2014, 01:00 PM Go to last post
  39. Prediction interval using a function that combines regression parameters

    I have a question about the prediction interval on a function that combines parameters obtained via linear regression. I was wondering if someone...

    Started by gwlucas‎, 12-16-2014 09:47 AM
    • Replies: 3
    • Views: 907
    12-16-2014, 11:18 AM Go to last post
  40. Question Fitting curves to dimensionless data sets

    I have a number of data sets that I have made non-dimensional across both the x and y axis, such that they range from 0 to 1. I want to fit curves...

    Started by yccmp‎, 12-16-2014 02:39 AM
    • Replies: 0
    • Views: 1,014
    12-16-2014, 02:39 AM Go to last post
  41. RegressIt: free Excel add-in for regression analysis

    Regression Analysis forum members: I'd like to announce the release of a free Excel add-in for regression and multivariate data analysis which is...

    Started by RegressIt‎, 05-30-2014 03:59 AM
    • Replies: 2
    • Views: 3,800
    12-15-2014, 06:41 PM Go to last post
  42. Question Generate model from known independent & dependent variables. Does this make sense?

    I am on a new job as a statistician, after studying stats some years ago. So please bear with me as I seek a solution to my problem. I'm trying...

    Started by bnew‎, 12-10-2014 04:52 PM
    known variables
    • Replies: 4
    • Views: 1,365
    12-15-2014, 05:56 PM Go to last post
  43. what is correlation???!!!!

    what is the meaning of correlation??????????

    Started by haraharae‎, 09-12-2014 12:45 PM
    • Replies: 4
    • Views: 1,168
    12-14-2014, 11:56 AM Go to last post
  44. Split sample regression vs Regression with interaction term

    Hi, I need some advice on using split sample regression versus regression with interaction term. My objective is to tell the difference, if any,...

    Started by wand‎, 12-12-2014 12:08 PM
    • Replies: 0
    • Views: 2,075
    12-12-2014, 12:08 PM Go to last post
  45. Predictions of new data based on an existing model

    Could someone help how to use an existing model (in this case it is model derived from discriminant analysis) to predict a new data set.

    Started by Cathy Carter‎, 12-10-2014 10:54 PM
    • Replies: 0
    • Views: 831
    12-10-2014, 10:54 PM Go to last post
  46. Hints/tips on what I should be looking for for economic signifiance

    uihgiuguiuoiuo

    Started by xinsaneik‎, 12-10-2014 02:21 PM
    • Replies: 0
    • Views: 724
    12-10-2014, 02:21 PM Go to last post
  47. Validate a model and select the best model fitted

    Hi, I have a doubt. I have fitted some data to different non linear models minimizing the sum of squares. Then I have calculated the AIC and BIC...

    Started by sanmath‎, 12-10-2014 12:01 AM
    • Replies: 0
    • Views: 706
    12-10-2014, 12:01 AM Go to last post
  48. 10 fold cross-validation

    I am looking at how good an experimental measures is to classify control group from a clinical group. I was asked to do 10-fold cross validation....

    Started by Cathy Carter‎, 12-09-2014 03:14 PM
    • Replies: 0
    • Views: 1,365
    12-09-2014, 03:14 PM Go to last post
  49. Post What does R, R square , Adjusted R square, STD error of estimates helps for ?

    Hello After I run out the regression analysis, can someone enlighten me what can I get from R, R square, STD Error estimates and the adjusted r...

    Started by hanialbarni‎, 12-06-2014 11:05 AM
    • Replies: 9
    • Views: 2,541
    12-08-2014, 06:40 PM Go to last post
  50. Help with creating a dummy variable with a categorical variable.

    I am very new to stats and this is not my thing. I need help in a class with creating dummy variables for the variable "education level". Im not...

    Started by cwcannon‎, 12-07-2014 10:06 PM
    • Replies: 1
    • Views: 977
    12-08-2014, 02:54 AM Go to last post
  51. Comparison of 2 models with observed data - identical R2?

    Hello! I am trying to compare field data with 2 models, but somehow both models give me identical R2. The models are derived from different sets...

    Started by iloveapple‎, 12-07-2014 06:49 AM
    r2 regression
    • Replies: 0
    • Views: 676
    12-07-2014, 06:49 AM Go to last post
  52. Multi-Level Options for Dataset

    Hello, I have a dataset of 15 subjects. Each subject has 12 scores that come from performing 7 tasks, so I have a total of 180 scores. The...

    Started by hlsmith‎, 12-05-2014 09:48 AM
    • Replies: 0
    • Views: 740
    12-05-2014, 09:48 AM Go to last post
  53. Regression analysis with nominal dependent variable

    Hello! In short: I'm having issues with figuring out a technique to measure how well does a categorical variable explain variation among a nominal...

    Started by Jüri‎, 12-03-2014 08:30 AM
    analysis, dependent, nominal, regression, variable
    • Replies: 3
    • Views: 1,135
    12-05-2014, 08:38 AM Go to last post
  54. OLS with dummy and few observations (12 mean values from 2.5k observations)

    Hi all :) Maybe you can help me with a problem I have in using OLS regression: I have a dataset of 12 markets, in total ~2.5k trades happened...

    Started by callino‎, 12-04-2014 08:08 AM
    • Replies: 1
    • Views: 1,006
    12-04-2014, 09:17 AM Go to last post
  55. Simple Logistic Regression

    Hey everyone, I had a question with respect to SLR. In Block 0: my classification table predicts 89.3% In Block 1: my classification table...

    Started by natenator‎, 12-02-2014 06:28 PM
    • Replies: 2
    • Views: 884
    12-03-2014, 04:31 AM Go to last post
  56. Significance of constant - Mean adjusted values vs. Z scores

    Hello everyone, I am trying to run a regression analysis on 2 Inputs and their relationship with 1 Outcome variable across a number of products. I...

    Started by Londoner‎, 11-30-2014 08:39 PM
    • Replies: 5
    • Views: 1,259
    12-02-2014, 10:23 PM Go to last post
  57. Best model time series regression

    I am about to start using regression models to predict future trends. I am not sure how one choses the best of various alternative models. I assume...

    Started by noetsi‎, 12-02-2014 04:38 PM
    • Replies: 2
    • Views: 677
    12-02-2014, 05:44 PM Go to last post
  58. bonferroni correction in multivariate regression

    hi, I just read something that made me think about this, the p-values we calculate in a multiple regression have no adjustment for multiple test (...

    Started by rogojel‎, 11-06-2014 01:00 PM
    2 Pages
    1 2
    bonferroni, multiple regressiom, significance
    • Replies: 27
    • Views: 4,756
    12-01-2014, 06:34 PM Go to last post
  59. What type of regression to use here

    This article shows two regression models an older simpler one and a later more complex one. They never identify the type of regression used. The...

    Started by noetsi‎, 12-01-2014 03:18 PM
    • Replies: 0
    • Views: 861
    12-01-2014, 03:18 PM Go to last post
  60. Measurement method for DV changed during longitudinal study

    Hi All, I'm using regression analysis (multilevel linear and logistic) on a measure of children's health behaviours over 5 time-points of data. I...

    Started by Colonel‎, 11-30-2014 07:22 PM
    • Replies: 0
    • Views: 837
    11-30-2014, 07:22 PM Go to last post

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