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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. (Poisson/NegBin, RE) Estimation of time-invariant predictors in a panel model

    Hello dear forum members, For a time being I had been working with the following model (Stata command format): - xtpoisson y x1 x2 x3 x4 x5, fe-...

    Started by kiton‎, 03-10-2016 02:03 PM
    negative binomial, poisson, random-effects, time-invariant
    • Replies: 3
    • Views: 1,638
    03-10-2016, 05:02 PM Go to last post
  2. Question Dummy variable in a Fixed effects (FE) model

    Hello :-) I am doing a paper where I examine the Scandinavian welfare model effect on inequality in the Scandinavian countries. I examine it using...

    Started by JoLinda91‎, 03-03-2016 05:54 AM
    • Replies: 4
    • Views: 1,497
    03-10-2016, 02:35 PM Go to last post
  3. chemical analysis

    Hi guys help me? I have a problem. I have to analyze a product just finished the processing (hot) and subsequently when it is cooled to room...

    Started by crimelist‎, 03-10-2016 02:44 AM
    • Replies: 13
    • Views: 1,887
    03-10-2016, 11:56 AM Go to last post
  4. regression of car accidents vs age (question about normality and implement gender)

    a few basic questions. I'm just starting to learn regression so I'm trying to apply what I'm learning. I have a set of data with ages ranging...

    Started by semidevil‎, 03-03-2016 09:38 PM
    • Replies: 14
    • Views: 2,492
    03-09-2016, 05:11 PM Go to last post
  5. Question about linear regression & residuals

    I have been reading up on linear regression and residual plots here on stattrek: http://stattrek.com/regression/residual-analysis.aspx?Tutorial=AP...

    Started by pablowilks‎, 03-08-2016 03:24 PM
    • Replies: 2
    • Views: 1,384
    03-09-2016, 07:46 AM Go to last post
  6. Categorical variables changing by their groupmean

    Hi For a project I need to model industrial data. Large part of the dataset consists out of nominal categorical variables (430 variables in total...

    Started by studentbelg‎, 03-08-2016 05:20 PM
    • Replies: 0
    • Views: 914
    03-08-2016, 05:20 PM Go to last post
  7. When to specify an interaction effect

    I have a model with about 20 variables in it (6 of them are dummies from a categorical variable with 7 levels). All of these are suggested by the...

    Started by noetsi‎, 03-08-2016 09:26 AM
    • Replies: 4
    • Views: 1,261
    03-08-2016, 01:18 PM Go to last post
  8. Assignment

    Please may you help me answer the question, I'm stuck. Thanx!! A property analyst is examining the relationship between the City councilís...

    Started by natra‎, 02-22-2016 06:43 AM
    • Replies: 2
    • Views: 1,887
    03-08-2016, 04:22 AM Go to last post
  9. Using median case load as a predictor

    I am testing the impact of a contractor or a public unit working with a customer . A big part of this is generating control variables so I can...

    Started by noetsi‎, 03-07-2016 05:56 PM
    • Replies: 1
    • Views: 1,266
    03-07-2016, 07:49 PM Go to last post
  10. Prediction Intervals

    I am in the process of calculating the prediction intervals on a time series data linear regression model The independent variable in my model is...

    Started by Mukund‎, 03-07-2016 04:58 AM
    prediction interval, regression
    • Replies: 0
    • Views: 651
    03-07-2016, 04:58 AM Go to last post
  11. Good Tool to generate probability of a sale for 300,000 products

    Hi - I am trying to determine a good tool that will help me generate a probability of a sale for a list of of 300,000 products. I have a table of...

    Started by BlendRed3‎, 03-06-2016 01:37 PM
    • Replies: 0
    • Views: 739
    03-06-2016, 01:37 PM Go to last post
  12. Nonparametric regression using kernel weights

    Hi! I am wondering how I can present the results of nonparametric regression. I performed the nonparametric tests using R, and R package 'np'. ...

    Started by nieve5552‎, 03-05-2016 09:57 PM
    nonparametric, reporting results, reporting statistics, results
    • Replies: 0
    • Views: 1,125
    03-05-2016, 09:57 PM Go to last post
  13. Which SSR (Regression sum of squares) is theoretically larger?

    Dear all, I have 3 fitted lines: Y = b0 + (b1)X Y = (0.5)b0 + (b1)X Y = b0 + 0.5(b1)X Where and In addition to the the 3 equations...

    Started by UniApply‎, 03-03-2016 12:10 PM
    • Replies: 2
    • Views: 881
    03-03-2016, 12:57 PM Go to last post
  14. MANOVA or Multivariate Regression? please help clarify

    Hi, Really hope someone can confirm. I think I need to use Multivariate regression for this; - one group of N judges score N performances and...

    Started by GiantCorn‎, 03-02-2016 08:58 AM
    • Replies: 0
    • Views: 669
    03-02-2016, 08:58 AM Go to last post
  15. Two variable OLS Regression - using normal equations

    Hi, I am experiencing difficulties in understanding the following question; I have been assigned two variables (X and Y), and have been...

    Started by UniApply‎, 03-01-2016 01:32 PM
    linear regression, normal equations, ols regression, regression analysis, two variables
    • Replies: 0
    • Views: 1,434
    03-01-2016, 01:32 PM Go to last post
  16. Split file regression, or Fixed effects Mixed model

    Within a dataset that has a few variables explaining dependent variable A, and influences vary over different categories, it can be obvious to split...

    Started by joostvanvlimmeren‎, 03-01-2016 06:21 AM
    fixed effect, fixed effect model, mixed effect, regression, split file
    • Replies: 2
    • Views: 965
    03-01-2016, 07:40 AM Go to last post
  17. Cool Linear regression on data with standard deviations?

    (crossposting from here) I am trying to do many linear regressions on series of data points where each data point is associated with a standard...

    Started by Sosi‎, 02-29-2016 12:00 PM
    linear regression
    • Replies: 0
    • Views: 978
    02-29-2016, 12:00 PM Go to last post
  18. Regression Analysis for Paired Data SAS

    Hi Everybody, I want to analyze paired data using regression analysis to adjust for covariates. I used PROC MIXED statement in SAS and I modeled...

    Started by Mai Mehanna‎, 02-27-2016 08:34 PM
    • Replies: 6
    • Views: 1,849
    02-29-2016, 08:52 AM Go to last post
  19. Multivariate regression with paired samples?

    Hello, First time poster here. I have data from two groups of people recorded during two different conditions. I would like to study how the...

    Started by mnd‎, 04-02-2013 12:44 PM
    • Replies: 10
    • Views: 11,052
    02-27-2016, 11:51 PM Go to last post
  20. Association between categorical and numerical variables using R

    Hi, I am new to this forum so please be kind :-). Not sure if this belongs in 'R'. I will describe my problem as good as I can. First of all I am...

    Started by MasterStudent‎, 02-25-2016 07:43 AM
    chi square, general linear model, r commander
    • Replies: 5
    • Views: 2,683
    02-25-2016, 12:06 PM Go to last post
  21. Talking Ordinal logistic regression or linear regression?

    Hi Guys, just wondering if I could have your help pls. I have a sample size of 55 patients (of which 22 were subsequently diagnosed with Heart...

    Started by skaur‎, 02-25-2016 05:14 AM
    • Replies: 0
    • Views: 1,346
    02-25-2016, 05:14 AM Go to last post
  22. What is the difference between an interaction effect and a moderator in regression?

    I hear these two concepts a lot in the literature. I have no idea what the difference is between a moderator and an interaction term. While I am...

    Started by noetsi‎, 01-28-2016 01:56 PM
    2 Pages
    1 2
    • Replies: 24
    • Views: 3,570
    02-24-2016, 03:02 PM Go to last post
  23. Panel Data Regression Models!

    Hello mates! I am doing thesis (research) as part of my degree completion requirement. My topic is a general one ďCapital Structure and Corporate...

    Started by Jibran‎, 02-01-2016 01:58 PM
    • Replies: 1
    • Views: 1,218
    02-24-2016, 08:49 AM Go to last post
  24. Pearson correlation coefficient and Standard dev

    I know the basic interpretation of r. I.e., -1(<or =)r(<or=1). Critical values for n etc. However, while helping a research nursing student, her...

    Started by Joolz‎, 02-23-2016 09:02 AM
    • Replies: 0
    • Views: 635
    02-23-2016, 09:02 AM Go to last post
  25. Is this really independent

    I read an article today that made me wonder. They used linear regression to predict income at closure. One of their predictor variables was income...

    Started by noetsi‎, 02-22-2016 06:00 PM
    • Replies: 3
    • Views: 1,156
    02-22-2016, 09:33 PM Go to last post
  26. Ordinal predictors

    I know there was a thread on this. I could not find it. This is the type of issue that concerns me. These authors had an ordinal predictor that...

    Started by noetsi‎, 02-22-2016 11:44 AM
    • Replies: 8
    • Views: 1,117
    02-22-2016, 05:10 PM Go to last post
  27. Solving Multicollinearity Issues

    Dear Community, Currently I am modeling a multiple regression for a research project with Stata. I want to examine the influence of...

    Started by AntonR‎, 02-05-2016 09:53 AM
    • Replies: 11
    • Views: 2,103
    02-22-2016, 08:59 AM Go to last post
  28. Question Reporting results of nonparametric regression

    Hi! I am wondering how you present the results of non parametric regression test. I run the nonparametric regression using R, and the package np ...

    Started by nieve5552‎, 02-19-2016 08:51 PM
    nonparametric, regression, results, rstats, statistics
    • Replies: 1
    • Views: 1,423
    02-20-2016, 07:48 AM Go to last post
  29. Unhappy Help with Interactaction Assesment

    Hello! Can anyone explain why my Breslow-Day test for interaction was significant (p=0.0005) but my forward selection logistic regression test for...

    Started by Naxaris‎, 02-15-2016 07:58 PM
    • Replies: 7
    • Views: 1,604
    02-16-2016, 09:19 AM Go to last post
  30. Multiple Choice Question Answer

    Is there any materials with multiple choice answer for basic statistics? If yes, How can I get it?

    Started by Saroj Pokhrel‎, 02-16-2016 07:07 AM
    • Replies: 0
    • Views: 919
    02-16-2016, 07:07 AM Go to last post
  31. Lightbulb Multiple Regression to receive cost for a single item of an order

    Hi everybody, I appreciate any kind of help and tips: Problem: - I have a dataset with 1600 orders - For each of these orders I know the...

    Started by christoph_b‎, 02-03-2016 05:02 PM
    • Replies: 7
    • Views: 1,855
    02-15-2016, 04:29 AM Go to last post
  32. anova repeated measures with interaction term

    i hva been sitting here for 6 hours trying to figure out what i am doing wrong, but i cant figure it out. I am doing anova with repeated measures....

    Started by ama_nil‎, 02-12-2016 07:57 AM
    • Replies: 0
    • Views: 1,010
    02-12-2016, 07:57 AM Go to last post
  33. Effects of general participation and intensity of participation

    Exploring data from a quasi-experimental study, we want to investigate effects of general participation in a program (dichotomous; part_dich) aswell...

    Started by l.frei‎, 02-08-2016 05:30 AM
    general participation, participation intensity, quasi-experimental study
    • Replies: 5
    • Views: 1,756
    02-10-2016, 08:48 AM Go to last post
  34. Best way to treat integer/float column with null values in logistic regression

    Hi, I was wondering if anyone can assist me with this issue. I am building a logistic regression model to predict purchase or not purchase...

    Started by rodule‎, 02-04-2016 05:13 PM
    logistic regression, python, scipy
    • Replies: 1
    • Views: 959
    02-10-2016, 03:12 AM Go to last post
  35. Need Help for explain variables

    Hello Dear Members, I am doing a research on Corporate R&D and market capitalization with 5 variables. There in no co linearity between my study...

    Started by Usmanhcbf‎, 02-08-2016 02:08 AM
    • Replies: 3
    • Views: 1,508
    02-09-2016, 11:00 AM Go to last post
  36. Smile twoway ANOVA, post hoc test? New to statistics.

    This is probably easy, but this is new to me, hoping for some help here:tup:

    Started by ama_nil‎, 02-08-2016 05:44 AM
    anova, newbie
    • Replies: 1
    • Views: 1,343
    02-08-2016, 07:39 PM Go to last post
  37. Confidence bands for a linear regression with X and Y errors

    Dear all, I have been searching for a while without finding a solution, so I hope someone here can help. Here is my problem: I have (X, Y)...

    Started by quentin.flm‎, 02-05-2016 09:23 AM
    • Replies: 5
    • Views: 1,448
    02-08-2016, 05:29 AM Go to last post
  38. Bayesian multiple regression issue in R

    I am attempting to generate a multiple regression model using JAGS on R and my results deviate substantially from MCMCregress and lm. I ran out of...

    Started by micdhack‎, 02-03-2016 05:09 PM
    • Replies: 0
    • Views: 719
    02-03-2016, 05:09 PM Go to last post
  39. Correlation for Binary Target Variable

    Hi, Just need someone to do a sanity for me. In linear regression, one might want to transform (log, power, etc...) a continuous independent...

    Started by Oberon‎, 02-03-2016 12:01 AM
    • Replies: 0
    • Views: 878
    02-03-2016, 12:01 AM Go to last post
  40. How do I test the significance of my correlation coefficients for various regressions

    Hi, I have a set of 25 points and I used a TI-84 calculator to calculate the linear, quadratic, logistic, exponential, and power regression models...

    Started by JohnDoeMath‎, 02-02-2016 11:10 AM
    correlation analysis, p-value, regression analysis, regression model, significance
    • Replies: 0
    • Views: 1,021
    02-02-2016, 11:10 AM Go to last post
  41. New Linear Regression Approach - Link Here

    My company has just released a free software download that eliminates known issues associated with traditional techniques. The InoraRAE has a simple...

    Started by OmniBear‎, 02-02-2016 10:42 AM
    linear, regression
    • Replies: 0
    • Views: 874
    02-02-2016, 10:42 AM Go to last post
  42. Should you use Bonferonni for regression

    It is common to generate many models in regression and only report the final one. To me this suggests that you should use some correction like...

    Started by noetsi‎, 01-30-2016 02:52 PM
    • Replies: 10
    • Views: 1,677
    02-01-2016, 10:37 AM Go to last post
  43. [R] Shapley values and relaimpo

    Hello everyone! Iíve been pondering this question for some time. Iíve searched online and on this forum and I havenít found the answer to my...

    Started by gheorghiu.alexandra‎, 02-01-2016 10:25 AM
    regression analysis, shapley value
    • Replies: 0
    • Views: 972
    02-01-2016, 10:25 AM Go to last post
  44. Correlation and regression

    Hello, it would be nice if you could provide the appropriate theoretical steps for the following task: There is a shop which also operates a pub....

    Started by DZ8‎, 01-30-2016 08:00 AM
    • Replies: 0
    • Views: 946
    01-30-2016, 08:00 AM Go to last post
  45. ANCOVA coding of categorical covariates

    Hello all, I am running an ANCOVA in R (Anova function) to assess the results of a randomized experimental study. I have a 2x2 full factorial...

    Started by Mark77‎, 01-28-2016 05:57 PM
    ancova, categorical covariates, gender
    • Replies: 0
    • Views: 853
    01-28-2016, 05:57 PM Go to last post
  46. Trend analysis / regression model with missing data

    Hi, I want to apply a Poisson GLM to count data, analyzing trends. However, there are missing counts (i.e. missing values in the outcome variable)...

    Started by mmercker‎, 01-26-2016 07:18 AM
    imputation, missing data, regression analysis, trend analysis
    • Replies: 8
    • Views: 1,753
    01-28-2016, 09:19 AM Go to last post
  47. Likert Scale Survey_regression analysis

    Dear all, I am new in this, so please help - I am conducting a survey for my thesis using Likert method. Through this research survey I would like...

    Started by Monjurul‎, 01-25-2016 09:47 AM
    • Replies: 13
    • Views: 1,796
    01-28-2016, 06:13 AM Go to last post
  48. Simple Linear Regression

    Dear Experts, Q1) In simple linear regression: a) Under what situations will the estimates b0 and b1 not be well-defined? b) What is the...

    Started by Tony_Danny‎, 01-27-2016 10:12 PM
    • Replies: 2
    • Views: 1,939
    01-27-2016, 11:17 PM Go to last post
  49. Regression following MANOVA results

    Hi Stats Gurus, This question is about a regression analysis that I want to run, but I am not too familiar with this type of analysis. I have...

    Started by jarbski2‎, 01-27-2016 11:54 AM
    manova, regression analysis
    • Replies: 5
    • Views: 1,360
    01-27-2016, 01:18 PM Go to last post
  50. Regression on Survey analysis across 50 states

    I ran a survey across all 50 states in the US. The goal is to see if there is a correlation between people's love for the state and the population...

    Started by vkredi‎, 01-26-2016 12:11 PM
    multilevel analysis, regression, regression analysis, survey, survey analysis
    • Replies: 0
    • Views: 2,224
    01-26-2016, 12:11 PM Go to last post
  51. Can I use multivariate analysis without univariate analysis?

    Dear all, I have a problem in my data analysis and paper writing. Some variables (dependents) were not statistically significantly correlated...

    Started by celinetang‎, 04-02-2013 05:39 AM
    • Replies: 14
    • Views: 22,518
    01-26-2016, 11:08 AM Go to last post
  52. Can AIC values be combined?

    Hello! I have hunted far and wide on the net in an attempt to answer this. Essentially, I'm trying to combine two AIC scores from different parts...

    Started by Alaska15‎, 01-26-2016 12:45 AM
    aic, combining models, growth curve, logistic regression, nonlinear regression
    • Replies: 1
    • Views: 1,880
    01-26-2016, 04:10 AM Go to last post
  53. Interpreting coefficients in pooled cross-sectional data with cluster-dummies

    Data: pooled cross-sectional data. 6 countries. 3 years of cross sectional data (10 year gaps in between), with different samples of individuals in...

    Started by Stropharia‎, 01-25-2016 10:15 PM
    cross-sectional, fixed effects model, regression coefficients
    • Replies: 0
    • Views: 790
    01-25-2016, 10:15 PM Go to last post
  54. What to do about violations of assumptions

    This is one example of a larger topic Say you are doing logistic regression and you have influential data points. You can't use robust regression...

    Started by noetsi‎, 01-25-2016 12:53 PM
    • Replies: 9
    • Views: 1,316
    01-25-2016, 06:01 PM Go to last post
  55. The Tobit Model

    Greatings for all, Suppose we are using the Latent Variable Formulation (i.e. not the Generalized Linear Modeling) for a multiple regression model...

    Started by Vivo Gharib‎, 01-25-2016 07:03 AM
    • Replies: 0
    • Views: 1,027
    01-25-2016, 07:03 AM Go to last post
  56. Positive definite issue with Likert data

    Hello, I ran my first data set through SPSS for a recent 5-point Likert questionnaire but am returning a "not positive definite" on the reduction. ...

    Started by jonwilliams‎, 01-24-2016 01:36 PM
    • Replies: 0
    • Views: 1,603
    01-24-2016, 01:36 PM Go to last post
  57. Which test for cont DV, 1 nominal IV (2 cat) + 1 nominal IV (4 cat) + 1 cont IV

    Hello, I am a bit struggling with choosing which test I should apply to my data. My dependent variable is continuous (participants could score...

    Started by Pernelle‎, 01-22-2016 06:26 AM
    • Replies: 4
    • Views: 2,267
    01-24-2016, 07:30 AM Go to last post
  58. Different signs

    Hello everybody: I have a litte problem interpreting my regression output. In the first regression, I have a continuous variable with a...

    Started by Student90‎, 01-23-2016 08:44 AM
    • Replies: 5
    • Views: 1,646
    01-24-2016, 05:09 AM Go to last post
  59. Ordinal Time-Series Dependent Variable

    I am attempting to run a regression with an ordinal DV that is panel/time series data. I only have SPSS and with the ordinal DV, it seems I should be...

    Started by COB1010‎, 01-23-2016 04:38 PM
    • Replies: 3
    • Views: 1,646
    01-23-2016, 05:00 PM Go to last post
  60. [R]: ROC curve after fitting a logistic model to a new datset

    Hello, I have fitted a Logistic Regression model (with 1 binary DV, and several IVs), and then I fitted it to a new dataset using the function...

    Started by gianmarco‎, 01-22-2016 08:24 AM
    • Replies: 5
    • Views: 1,249
    01-23-2016, 06:45 AM Go to last post

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