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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. 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 01:39 AM
    • Replies: 0
    • Views: 540
    12-16-2014, 01:39 AM Go to last post
  2. 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: 2,457
    12-15-2014, 05:41 PM Go to last post
  3. 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 03:52 PM
    known variables
    • Replies: 4
    • Views: 905
    12-15-2014, 04:56 PM Go to last post
  4. what is correlation???!!!!

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

    Started by haraharae‎, 09-12-2014 12:45 PM
    • Replies: 4
    • Views: 921
    12-14-2014, 10:56 AM Go to last post
  5. 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 11:08 AM
    • Replies: 0
    • Views: 1,306
    12-12-2014, 11:08 AM Go to last post
  6. 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 09:54 PM
    • Replies: 0
    • Views: 512
    12-10-2014, 09:54 PM Go to last post
  7. Hints/tips on what I should be looking for for economic signifiance

    uihgiuguiuoiuo

    Started by xinsaneik‎, 12-10-2014 01:21 PM
    • Replies: 0
    • Views: 410
    12-10-2014, 01:21 PM Go to last post
  8. 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, 12-09-2014 11:01 PM
    • Replies: 0
    • Views: 538
    12-09-2014, 11:01 PM Go to last post
  9. 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 02:14 PM
    • Replies: 0
    • Views: 722
    12-09-2014, 02:14 PM Go to last post
  10. 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 10:05 AM
    • Replies: 9
    • Views: 1,520
    12-08-2014, 05:40 PM Go to last post
  11. 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 09:06 PM
    • Replies: 1
    • Views: 652
    12-08-2014, 01:54 AM Go to last post
  12. 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 05:49 AM
    r2 regression
    • Replies: 0
    • Views: 470
    12-07-2014, 05:49 AM Go to last post
  13. 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 08:48 AM
    • Replies: 0
    • Views: 539
    12-05-2014, 08:48 AM Go to last post
  14. 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 07:30 AM
    analysis, dependent, nominal, regression, variable
    • Replies: 3
    • Views: 838
    12-05-2014, 07:38 AM Go to last post
  15. 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 07:08 AM
    • Replies: 1
    • Views: 610
    12-04-2014, 08:17 AM Go to last post
  16. 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 05:28 PM
    • Replies: 2
    • Views: 687
    12-03-2014, 03:31 AM Go to last post
  17. 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 07:39 PM
    • Replies: 5
    • Views: 952
    12-02-2014, 09:23 PM Go to last post
  18. 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 03:38 PM
    • Replies: 2
    • Views: 518
    12-02-2014, 04:44 PM Go to last post
  19. 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 12:00 PM
    2 Pages
    1 2
    bonferroni, multiple regressiom, significance
    • Replies: 27
    • Views: 3,671
    12-01-2014, 05:34 PM Go to last post
  20. 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 02:18 PM
    • Replies: 0
    • Views: 649
    12-01-2014, 02:18 PM Go to last post
  21. 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 06:22 PM
    • Replies: 0
    • Views: 622
    11-30-2014, 06:22 PM Go to last post
  22. Measurement method for DV changed during longitudinal study

    Hi All, I'm performing a data analysis on a dataset I didn't do the collection for, and I am contending with some odd decisions made by the people...

    Started by Colonel‎, 11-30-2014 05:36 PM
    • Replies: 0
    • Views: 234
    11-30-2014, 05:36 PM Go to last post
  23. Bootstrap

    Hey, I am new to this forum and I have a question about Bootstrapping. I want to calculate some critical values. The data generating process is...

    Started by rantamblan‎, 11-29-2014 09:45 AM
    • Replies: 2
    • Views: 925
    11-30-2014, 04:45 AM Go to last post
  24. Assistance with Linear Regression Model (Model is Not Full Rank)

    Hello all, I'm currently doing a project in a computer statistics class of mine, and I have run into some potential trouble. I'll admit, I'm not...

    Started by BarnabyJones21‎, 11-29-2014 01:44 PM
    • Replies: 0
    • Views: 675
    11-29-2014, 01:44 PM Go to last post
  25. Hedonic regression

    What is the rationale behind hedonic quality index and how to interpret it? For any example/explanation beside the Wikipedia, I would be very...

    Started by john_f‎, 11-28-2014 02:25 PM
    multiple regression, regression
    • Replies: 0
    • Views: 653
    11-28-2014, 02:25 PM Go to last post
  26. Regression Analysis for comparison of crime rates across a river

    I need a bit of help refining a regression comparing crime rates of counties separated by a river. My current equation looks like: ...

    Started by acoll‎, 11-25-2014 03:43 PM
    • Replies: 1
    • Views: 749
    11-27-2014, 09:31 PM Go to last post
  27. Post Newbie question why we use regression ?

    Hello , Can someone explain to me why we use regression analysis , it will help us in understanding what ? , what we will gain from doing regression...

    Started by hanialbarni‎, 11-27-2014 09:00 PM
    • Replies: 2
    • Views: 613
    11-27-2014, 09:28 PM Go to last post
  28. What is the “pdm” stat in the “rms” R package?

    I am new to the world of Regression in statistics and I have been doing a research in which I am building an ordinal logistic regression model (ORM)....

    Started by danielalencar‎, 11-27-2014 06:17 PM
    measurement, orm, pdm, regression, rms
    • Replies: 0
    • Views: 1,557
    11-27-2014, 06:17 PM Go to last post
  29. Interpreting multiple regression beta values

    Basic question here but just want to double check my understanding.. When I do a multiple regression I get beta values b1=0.01 and b2=0.7 This...

    Started by jfw13‎, 11-27-2014 10:43 AM
    beta values, regression
    • Replies: 5
    • Views: 833
    11-27-2014, 02:33 PM Go to last post
  30. Guidance needed

    I am in healthcare and I want to predict future volume (primarily just the end of the current month). The problem I have with using a traditional...

    Started by psrs0810‎, 11-24-2014 07:03 PM
    • Replies: 2
    • Views: 715
    11-25-2014, 03:42 PM Go to last post
  31. Panel Data: Add Fixed Effects Before or After Controls?

    Hi all, I'm using 51 entities with seven independent variables. Is it typically better to add entity/time fixed effects at the beginning or at the...

    Started by GWStudent‎, 11-24-2014 11:27 PM
    panel data
    • Replies: 0
    • Views: 529
    11-24-2014, 11:27 PM Go to last post
  32. Smile Running multple, multiple regressions? which statistical test should i use?

    I have done a study on whether personality and demographics predict interaction on facebook brand pages. I have used a Big five personality scale...

    Started by arnika‎, 11-21-2014 08:22 AM
    correlation, regression, spss
    • Replies: 5
    • Views: 917
    11-22-2014, 07:18 AM Go to last post
  33. Regression analysis with independant variable (error) and multiple dependant variable

    So I took a lot of data (~10000) on a machine (3D printer). For each reading, I got the error and a lot of different parameter (speed, voltage,...

    Started by Elok‎, 11-18-2014 12:25 PM
    2 Pages
    1 2
    linearity, regression analysis
    • Replies: 26
    • Views: 3,041
    11-21-2014, 07:24 AM Go to last post
  34. Analyse a variable as continuous and as categorical

    Hello everybody I performed a univariate analysis of a set of predictors. My plan was to include the significant predictors in a multivariate cox...

    Started by noob‎, 11-20-2014 03:01 PM
    • Replies: 3
    • Views: 759
    11-21-2014, 07:14 AM Go to last post
  35. Double Regression?

    I am looking at two years of financial info by month. I need to project out next month - however, at the end of our one fiscal year there was a...

    Started by psrs0810‎, 11-20-2014 09:11 AM
    • Replies: 1
    • Views: 592
    11-20-2014, 02:08 PM Go to last post
  36. Mathematical calculation in Access

    I have a math problem and I want to ask me pomognete.I working on complex desktop database.My main point is making the application for the simulation...

    Started by j235‎, 11-18-2014 03:38 PM
    • Replies: 1
    • Views: 669
    11-18-2014, 04:16 PM Go to last post
  37. SVAR parameter standard errors

    Hi everyone, How to calculate the standard errors of SVAR parameters. I know how to estimate it for contemporaneous parameter. I want to know how...

    Started by cjiang3‎, 11-17-2014 11:55 AM
    svar, var
    • Replies: 2
    • Views: 1,118
    11-18-2014, 08:27 AM Go to last post
  38. REGRESSION are these real findings or outcomes of preexisting differences?

    Hi guys, I have a N=138 sample that consists of 56 participants form one country and 82 from another country. When i run a stepwise regressions...

    Started by coffeehipster‎, 11-15-2014 06:55 PM
    • Replies: 2
    • Views: 756
    11-17-2014, 06:27 PM Go to last post
  39. Dummy variables (and poster!)

    Hi, Could someone please help me understand dummy variables? If I had a variable which was “Religion” that was coded: 1 = Catholic 2 =...

    Started by Kenny‎, 11-16-2014 11:42 AM
    • Replies: 1
    • Views: 685
    11-16-2014, 02:52 PM Go to last post
  40. Interaction/Moderation Question

    So I know that the terms interaction and moderation are used pretty much interchangeably. However, is it possible for variables to interact without...

    Started by RER31‎, 11-14-2014 08:36 PM
    • Replies: 4
    • Views: 939
    11-16-2014, 07:42 AM Go to last post
  41. Reporting results of non-linear regression with centered variables

    Hi I have a regression y = a + b1(x) + b2(x^2) + ...bn + e when i run the regression b1 and b2 are significant (and of opposite sign) but...

    Started by steve1‎, 11-04-2014 10:55 AM
    • Replies: 3
    • Views: 1,249
    11-14-2014, 10:12 AM Go to last post
  42. Rank-ordered Logistic Regression - assumptions?

    Hello dear forum members, The DV in the recently undertaken study is Rank (1-899). I believe, rank-ordered logistic regression is the proper type...

    Started by kiton‎, 11-14-2014 10:08 AM
    • Replies: 0
    • Views: 537
    11-14-2014, 10:08 AM Go to last post
  43. how to find interaction terms in regression modeling

    Given a set of predictor variables, are there any ways to test interaction terms? If I test one by one, it will be impossible to do it?

    Started by winecoding‎, 11-13-2014 07:13 PM
    interaction, regression
    • Replies: 3
    • Views: 743
    11-14-2014, 09:58 AM Go to last post
  44. Hotelling's Trace v. Hotelling's T^2- Why make the move?

    Hello, I am writing a dissertation and my chair wants me to convert Hotelling's Trace (resulting from my MANOVA) into Hotelling's T^2. No problem...

    Started by te156311‎, 11-14-2014 06:17 AM
    anova, hotelling's, manova, regression, t-tests
    • Replies: 0
    • Views: 849
    11-14-2014, 06:17 AM Go to last post
  45. Avoiding spurious regression in meta-regression using stationary variables like GDP

    I have been reading everything I can get my hands on about spurious regression but can't seem to definitively find out what is best in regressing...

    Started by samuelle‎, 11-12-2014 10:10 AM
    gdp, meta-regression, spurious, stationary variables
    • Replies: 0
    • Views: 670
    11-12-2014, 10:10 AM Go to last post
  46. Instrumental Variable Regression

    Dear All I am writing my master thesis about countervailing power in the HIV medication drug market. For doing so I am conducting the regression:...

    Started by Nathalie_Frisch‎, 11-10-2014 09:41 AM
    • Replies: 1
    • Views: 774
    11-10-2014, 12:07 PM Go to last post
  47. Calculating AUC for just one binary variable legitimate?

    Dear members of talkstats, I am a junior Radiology resident in France and I have an urgent question about my study. I am checking the capability...

    Started by MeganFrance‎, 10-13-2014 03:19 PM
    • Replies: 4
    • Views: 957
    11-08-2014, 07:06 AM Go to last post
  48. help deciding on best fit regression model

    Hi I could do with some assistance for selecting a regression model for my data. The data is for a BSc science study and is analyising the...

    Started by rat101‎, 11-08-2014 03:56 AM
    • Replies: 0
    • Views: 604
    11-08-2014, 03:56 AM Go to last post
  49. Some Conceptual Questions About Quantile Regression

    Dear all, I have been teaching myself how to run quantile regression in R using the package called "quantreg." I was able to run these analyses...

    Started by myautumn28‎, 10-27-2014 10:10 PM
    • Replies: 1
    • Views: 783
    11-07-2014, 08:35 AM Go to last post
  50. Unhappy Logistic Regression on small sample size/case ratio - SPSS?

    Hi all - I have a small issue. I have a categorical dichotomous DV (0,1) with 4 IV's , two of which are categorical and dichotomous (0,1), and the...

    Started by ProXy124c41‎, 10-30-2014 12:08 PM
    logistic
    • Replies: 2
    • Views: 5,248
    11-03-2014, 09:04 PM Go to last post
  51. Get correlation matrix of 3 variables from any combination of 3 simples/partials

    Here is the situation. I am writing a program that does Cool And Interesting Things starting with a correlation matrix among 3 variables: call...

    Started by Jake‎, 10-29-2014 05:44 PM
    • Replies: 0
    • Views: 745
    10-29-2014, 05:44 PM Go to last post
  52. Question Forecasting with fewer data points

    Hi, Can someone provide more insights on how we can achieve forecasting with fewer data points and come up with more accurate models. I have...

    Started by sihasan‎, 10-23-2014 07:53 AM
    forecasting
    • Replies: 4
    • Views: 832
    10-29-2014, 08:46 AM Go to last post
  53. Reporting variables into main equation after sqrt or log transformation

    Hi Everybody, If I am creating a multiple regression model such as Y = 3 + 1.5apple + 2melon and some of the indipendent variables underwent a...

    Started by F111‎, 10-23-2014 05:12 PM
    heteroskeds
    • Replies: 0
    • Views: 604
    10-23-2014, 05:12 PM Go to last post
  54. Analysis of a longitudinal study where interventions are received at different times

    I have a data set of university students. The university has 8 different assisting programs, mostly like scholarships, for needy students to help...

    Started by Blain Waan‎, 10-20-2014 02:08 PM
    longitudinal study, regression analysis, repeated measures
    • Replies: 2
    • Views: 642
    10-23-2014, 04:56 AM Go to last post
  55. Summarizing time series data

    Hello, Thank you very much for taking the time to read this! I have many (~70) time series showing the average body size (kg) for the ~50...

    Started by kmj‎, 10-20-2014 10:53 PM
    series, temporal, time, time series
    • Replies: 5
    • Views: 1,250
    10-21-2014, 04:18 PM Go to last post
  56. Inclusion of a control variable makes a predictor significant

    I'm running a logistic regression model. The outcome is political activism (1/0) and the significant predictors (dummy variables) are education,...

    Started by jjarg‎, 10-16-2014 03:23 PM
    logistic regression
    • Replies: 3
    • Views: 1,110
    10-18-2014, 05:41 AM Go to last post
  57. How can log link still allow negative predicted values?

    I have been attempting to get a meaningful outcome of my data for months, and could really do with some help where to go next. I am attempting to...

    Started by samuelle‎, 10-17-2014 10:50 AM
    glm regression, negative values, regression
    • Replies: 0
    • Views: 583
    10-17-2014, 10:50 AM Go to last post
  58. Multilevel: Include only two dummies of a 7-1 dummy set into random slope?

    I am calculating a two-level linear multilevel analysis. A look at the random intercept random slope model showed me a significant decrease in my...

    Started by David_D‎, 10-15-2014 11:44 AM
    • Replies: 5
    • Views: 1,170
    10-16-2014, 01:50 PM Go to last post
  59. regression models with mixed types of independent variables

    I am working on building a forecasting model, the independent variables are grouped into three types: some variables are continuous; some variables...

    Started by winecoding‎, 10-14-2014 10:24 PM
    forecasting, regression
    • Replies: 6
    • Views: 1,223
    10-15-2014, 12:45 PM Go to last post
  60. Hierarchical Regression Analyses - Testing for a Potential Power Issue

    Hi all, My sample consists of 236 participants and I am interesting in investigating the association of several factors with my outcome variable....

    Started by Junmato‎, 10-11-2014 11:10 AM
    • Replies: 1
    • Views: 770
    10-15-2014, 10:38 AM Go to last post

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