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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. How to handle dummy variable with fraction as possible values

    Hello , I am working on a data with a dummy variable values not just 0 or 1. It has fractions as values which denote the number of month within a...

    Started by samisan‎, 08-12-2017 04:42 PM
    • Replies: 5
    • Views: 289
    08-13-2017, 05:27 AM Go to last post
  2. Interaction / Moderation effect linear regression

    Hi, I have a question regarding a moderation effect with linear regression. I have hypothesized for a significant main effect and another...

    Started by diederikvanduuren‎, 08-01-2017 03:34 PM
    • Replies: 6
    • Views: 295
    08-12-2017, 11:34 AM Go to last post
  3. Determine Confounding using Multivariate analysis

    After we adjusted for confounders in the Multivariate analysis, How do we determine that if the variable is confounding or not? I read somewhere...

    Started by sandyzman‎, 08-11-2017 01:49 PM
    • Replies: 1
    • Views: 114
    08-11-2017, 02:04 PM Go to last post
  4. high correlation among interaction terms

    Y= alpha+ b1*x1 + b2*x2 + b3* x3 +b4*x4 + b5*dummy1*x1+b6*dummy1*x2 + b7*dummy1*x3 +b8*dummy1*x4 I run the correlation between all the regression...

    Started by 12345678‎, 08-10-2017 06:11 AM
    interaction, multicolinearity
    • Replies: 0
    • Views: 122
    08-10-2017, 06:11 AM Go to last post
  5. 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: 2,465
    08-07-2017, 07:31 PM Go to last post
  6. Correlation among a paired multiple vairable for a special case

    Hi all, I've run into a stats problem that I can't figure out. I have a pair of linked variables (x,y) that I want to correlate with a third...

    Started by willct‎, 08-06-2017 07:22 AM
    • Replies: 1
    • Views: 146
    08-07-2017, 06:41 PM Go to last post
  7. How to report Multiple Regression Results

    Dear Forum, for my thesis I want to investigate the relationship between certain health behaviors (e.g. eating behavior) and participants...

    Started by lisannceline‎, 08-07-2017 09:22 AM
    • Replies: 0
    • Views: 39
    08-07-2017, 09:22 AM Go to last post
  8. Model for regression with multiple binomial predictors?

    Hi everyone, I was wondering what model to pick when all the predictors are binomial distributions. I have a website that's being visited...

    Started by Junes‎, 08-02-2017 03:47 PM
    2 Pages
    1 2
    • Replies: 17
    • Views: 496
    08-04-2017, 04:18 PM Go to last post
  9. Odds ratios for multilevel categorical variable

    Hi, I have a categorical variable with three levels that represent disease severity (0=no disesase, 1=mild, 2=severe disease) and I have put it...

    Started by Markica85‎, 08-04-2017 10:52 AM
    • Replies: 3
    • Views: 163
    08-04-2017, 01:31 PM Go to last post
  10. matrix iv and dv

    hi all The independent variable i got is a 52x16 matrix The dependent variable i got is also a 52x16 martix (This is one variable) what kind...

    Started by jackfrom14‎, 08-01-2017 03:22 AM
    • Replies: 0
    • Views: 131
    08-01-2017, 03:22 AM Go to last post
  11. Regression or regression alternatives for data missing not at random

    I am analyzing the results of a satisfaction survey. The research question or goal is to determine whether or not (dis-)satisfaction with...

    Started by appendix‎, 07-29-2017 09:08 PM
    • Replies: 4
    • Views: 223
    07-31-2017, 02:43 PM Go to last post
  12. Easy Bayesian Statistics

    Well the thread title was to get your attention. About a month ago I attended a workshop on Bayesian statistics. It introduced the basic principles...

    Started by hlsmith‎, 07-29-2017 11:41 AM
    • Replies: 1
    • Views: 194
    07-31-2017, 08:49 AM Go to last post
  13. Looking for references on Passing-Bablok curve fitting.

    Hi, I am computer programmer and I need to implement the Passing-Bablok method in one application I have. Yet, I am a little stuck since I don't...

    Started by gmmo‎, 07-28-2017 06:33 PM
    passing-bablok method
    • Replies: 0
    • Views: 132
    07-28-2017, 06:33 PM Go to last post
  14. Logistic regression - a very simple question

    I have a question regarding the likelihood. I am trying to assess the likelihood of being in a family history positive group (FH+) on alcoholism (0...

    Started by yadayada‎, 07-26-2017 05:54 PM
    • Replies: 5
    • Views: 305
    07-27-2017, 12:29 PM Go to last post
  15. Coefficient sign varys over the distribution of the dependent variable

    Hi, Lets say I am estimating a linear regression with Y as a continuous DV and X as a binary IV. Based on theoretical reasons I am assuming that...

    Started by xs0982‎, 07-21-2017 08:53 AM
    • Replies: 1
    • Views: 284
    07-21-2017, 11:16 AM Go to last post
  16. Modeling portfolio using multiple regressions

    Hi All, I'm wondering about the viability of this task. I'm looking to form something similar to an investment portfolio, which aggregates...

    Started by JoeJackson12‎, 07-17-2017 07:05 AM
    multiple regression, portfolio, regression analysis, securities
    • Replies: 2
    • Views: 292
    07-21-2017, 07:21 AM Go to last post
  17. Negative Binomial Regression and Type I Errors

    Hi, I've completed three test of negative binomial regression. One test had 14 independent variables, and the other two had 7 independent...

    Started by Username123‎, 07-20-2017 07:34 AM
    • Replies: 2
    • Views: 214
    07-21-2017, 03:05 AM Go to last post
  18. Calibration set for PLS regression

    Hello everyone, New to this forum and kind of wondering why I hadn't thought to search for one before tonight... I hope a light at the end of the...

    Started by lonobean‎, 07-20-2017 06:40 AM
    calibration, pls, sample, spectroscopy, training
    • Replies: 0
    • Views: 154
    07-20-2017, 06:40 AM Go to last post
  19. Logistic Regression - predicted probabilities opposite to actual percentages

    Hi! I've asked this question elsewhere but haven't yet got a response that makes much sense to me... I have conducted a logistic regression in...

    Started by DrJay‎, 07-13-2017 08:52 AM
    • Replies: 6
    • Views: 357
    07-17-2017, 03:40 AM Go to last post
  20. help with mediation analysis

    hey- i just conducted a study with 2 IVs and 1 DV, i found statistically signification relationships between IV1 and the DV and IV2 and the DV. I...

    Started by donthatekate‎, 07-16-2017 06:37 PM
    • Replies: 0
    • Views: 162
    07-16-2017, 06:37 PM Go to last post
  21. Checking assumptions regression categorical predictors

    Hi, I am doing a regression analysis on review star rating of VR headsets as a dependent variable and 14 attribute dummies. Each dummy is an...

    Started by diederikvanduuren‎, 07-10-2017 12:24 PM
    • Replies: 2
    • Views: 274
    07-10-2017, 06:56 PM Go to last post
  22. Importance of vars in linear regression (R)

    I have a question that is and R question and a statistical question: I am analysing sales of a retailer. These sales are related to some vars:...

    Started by juanvg1972‎, 07-04-2017 10:12 AM
    caret, important predictors, linear regression, r language, statistic
    • Replies: 2
    • Views: 311
    07-10-2017, 06:42 PM Go to last post
  23. Regression against the mean

    Hi, the data behaves in a certain way. It has the tendency to regress to the mean as well as is correlated to another factor Y. Is it correct to do a...

    Started by lawlsh‎, 07-06-2017 08:51 PM
    • Replies: 1
    • Views: 349
    07-07-2017, 01:42 AM Go to last post
  24. Lightbulb Log-transforming Only the Dependent Variable

    For the regression: ln(gestation) = 5.28 + 0.0104×Birthweight For the birthweight and gestation data, Minitab tells us that coefficient of...

    Started by hymth‎, 07-03-2017 09:50 PM
    log, log transformation, log-linear
    • Replies: 8
    • Views: 393
    07-06-2017, 03:25 AM Go to last post
  25. How do I run a moderator analysis within zero-inflated negative binomial(ZINB) reg?

    How do I run a moderator analysis within zero-inflated negative binomial(ZINB) regression? I do have independent variables (Social Network...

    Started by SEWON‎, 07-01-2017 11:22 PM
    moderated regression, zero-inflation
    • Replies: 0
    • Views: 203
    07-01-2017, 11:22 PM Go to last post
  26. Reporting Dummy Variables and Determining Significance

    Hi all, I was just wondering, how does a person determine the significance of a categorical variable in a hierarchical regression model if one...

    Started by Aegislash‎, 06-27-2017 12:11 PM
    control, dummy variables, hierarchical regression, significance, step 2
    • Replies: 1
    • Views: 293
    06-27-2017, 12:46 PM Go to last post
  27. between-subject variation PROC MIXED in SAS

    I haven't used mixed models for long and can't remember much about it. So here's a silly question. Suppose below is my program to model a repeated...

    Started by sunny3333‎, 06-21-2017 12:50 PM
    • Replies: 2
    • Views: 357
    06-26-2017, 11:20 AM Go to last post
  28. Using a dummy variable to model threshold effects

    Hi All, I'm new to this thread and very green/inexperienced in using regressions. I'm trying to model threshold effects in a time series analysis -...

    Started by JoeJackson12‎, 06-26-2017 08:28 AM
    dummy variable, threshold, time series
    • Replies: 0
    • Views: 207
    06-26-2017, 08:28 AM Go to last post
  29. Question HLM - non-linear IV and placement of individual characteristics in the model

    Hi all! I am working on my dissertation and run across a couple of questions when structuring HLM model. The data looks as follows: I conducted an...

    Started by doroshishka‎, 06-22-2017 05:04 PM
    categorical variables, hlm, variable in model
    • Replies: 0
    • Views: 235
    06-22-2017, 05:04 PM Go to last post
  30. Exclamation How to use Regression to solve this task

    Hi, I am new to statistics and in uni we use SPSS to solve statistical problems. I have difficulty to orientate how to solve a problem with...

    Started by Kris_stat‎, 06-17-2017 09:08 AM
    • Replies: 1
    • Views: 385
    06-17-2017, 09:50 AM Go to last post
  31. Unbalanced ANCOVA

    Hi all, I have data in this format: 2 independent variables: 1 factor with 3 levels (3 different locations) ...

    Started by smed‎, 06-12-2017 10:03 AM
    • Replies: 0
    • Views: 413
    06-12-2017, 10:03 AM Go to last post
  32. Distribution of fixed effects

    Hi all, Let me shortly introduce my research: I am looking at whether companies outperform each other in investments. To do this I observe them at...

    Started by daniel_smit‎, 06-09-2017 05:07 AM
    distribution, fixed effect model, normal distributed, panel data
    • Replies: 3
    • Views: 543
    06-09-2017, 11:56 AM Go to last post
  33. Multiple rows per respondent

    Hey everyone, I have 6 rows of data per respondent and I'd like to perform a linear regression analysis. I'm just not sure about 1 thing. My...

    Started by Giorgi‎, 06-08-2017 02:47 PM
    • Replies: 2
    • Views: 413
    06-09-2017, 05:29 AM Go to last post
  34. Compare regression coefficients of two settings with similar samples

    Dear Statisticians, For my thesis I am currently examining whether the accounting principles have an influence on the relation between having a...

    Started by Daniel_W‎, 06-09-2017 03:32 AM
    • Replies: 0
    • Views: 222
    06-09-2017, 03:32 AM Go to last post
  35. Comparing effect sizes of two longitudinal linear relationships

    Is there a way to determine if one longitudinal linear relationship is significantly stronger than another? I was planning on using regression...

    Started by dbt_healthpsych‎, 06-08-2017 12:51 PM
    effect sizes, longitudinal data, moderated multiple regres
    • Replies: 2
    • Views: 239
    06-08-2017, 10:16 PM Go to last post
  36. Trichotomizing an Independent Variable

    In SPSS, how does one go about trichotomizing an independent variable such that about 33% are in each of the three groups?

    Started by langood‎, 06-08-2017 11:54 AM
    linear regression, multiple regression, trichotomize
    • Replies: 4
    • Views: 346
    06-08-2017, 06:19 PM Go to last post
  37. Regression: Multiple Independent Variables by Year

    Hello All! First time here and working in SPSS. I'm having a difficult time running a regression using test score proficiency as my dependent...

    Started by BF_Grad‎, 06-06-2017 05:42 PM
    • Replies: 1
    • Views: 423
    06-07-2017, 02:33 PM Go to last post
  38. When are residual plots ok?

    In general you want a random scatter in the residuals. You want no obvious patterns. I know that is the theory. But what does that really mean in...

    Started by noetsi‎, 06-05-2017 06:46 PM
    • Replies: 2
    • Views: 468
    06-05-2017, 09:44 PM Go to last post
  39. Regression Analysis

    Hey everyone, I have a regression model where I have as a dependent variable daily stock prices over 365 days for multiple stocks. I am...

    Started by Tartaglia‎, 06-05-2017 02:44 PM
    • Replies: 2
    • Views: 402
    06-05-2017, 03:35 PM Go to last post
  40. Multiple regression V.S. Bivariate regression

    Hi there, I'm interested in the effect of several variables on severity of schizophrenia symptoms. I want to look at the effect of 9 predictor...

    Started by the_gentle_ninja‎, 06-03-2017 08:39 PM
    bivariate regression, linear regression, multiple regression, regression
    • Replies: 3
    • Views: 502
    06-05-2017, 08:32 AM Go to last post
  41. Master thesis, statistics check!

    About me: Medical student with minimal statistical knowledge or research experience Question related to: statistical regression/correlation...

    Started by DutchMedicalStudent‎, 05-22-2017 09:30 AM
    blinded data, correlation, master thesis, spearman correlation
    • Replies: 12
    • Views: 1,810
    06-02-2017, 03:24 AM Go to last post
  42. Question Analyzing Tagged Content: Is a Multiple Regression Analysis the Right Approach?

    I’m working with a relatively small data set that consists of several hundred social media posts, key engagement metrics and up to 10 content “tags”...

    Started by stupidpoeticjustice‎, 06-01-2017 02:09 PM
    marketing, regression analysis, social network, statistics
    • Replies: 1
    • Views: 401
    06-02-2017, 12:10 AM Go to last post
  43. Repeated measures question

    Hello. I have taken day to day repeated measures in number of predictor variables as well as some other ordinal dvs. I want to meaure the effect of...

    Started by LEMONIAS‎, 11-20-2016 06:56 PM
    • Replies: 6
    • Views: 2,758
    05-31-2017, 04:14 AM Go to last post
  44. Seeking advise on predictive modeling approach

    Hello dear forum members! Currently, I am working on a project that aims to predict a certain cancer-related outcome (y) using a number of control...

    Started by kiton‎, 05-30-2017 12:08 PM
    • Replies: 3
    • Views: 597
    05-30-2017, 05:27 PM Go to last post
  45. Seek non-black box alternative to random forest

    I've recently had a research manuscript rejected by an editor. The manuscript showed that for a real life data set, random forest outperformed...

    Started by abendrot‎, 05-30-2017 11:04 AM
    • Replies: 1
    • Views: 468
    05-30-2017, 11:55 AM Go to last post
  46. Regression for river level prediction

    I am an avid whitewater kayaker. Many streams have US Geological Survey (USGS) gauges on them. However, some of the best do not. I would like to...

    Started by RhythmanJoe‎, 05-29-2017 11:09 PM
    • Replies: 1
    • Views: 475
    05-30-2017, 09:00 AM Go to last post
  47. Regression

    Hi How I can use regression analysis?

    Started by Kimudao‎, 05-27-2017 11:46 PM
    • Replies: 2
    • Views: 448
    05-28-2017, 09:41 PM Go to last post
  48. Question R square read with or without confounder in the analysis

    Hey, My bachelor thesis is about fatigue, nausea and cognitive decline in patients who have head and neck radiation. For example, the dependent...

    Started by lisa177‎, 05-27-2017 07:35 AM
    confounders, multivariable, r square
    • Replies: 2
    • Views: 572
    05-28-2017, 06:38 AM Go to last post
  49. Question Logistic regression with both positive and negative values for independent variable?

    Hi guys, I have a general regression question. Is there an issue with doing a logistic regression with both positive and negative values in the...

    Started by thenewcat‎, 05-27-2017 10:45 AM
    • Replies: 2
    • Views: 579
    05-27-2017, 01:12 PM Go to last post
  50. Deviance residuals in model fitted via MCMC

    I fitted a regression model in a Bayesian approach via MCMC. The JAGS code for the model is model{ for(i in 1:n) { y ~ dbeta(alpha, beta) alpha...

    Started by askazy‎, 05-26-2017 09:39 PM
    • Replies: 0
    • Views: 426
    05-26-2017, 09:39 PM Go to last post
  51. linear regression practice

    I wanted to check over my answers based on these questions Thanks (1) True/False: Clustering is an unsupervised learning problem. (2) ...

    Started by shane414‎, 05-21-2017 06:07 AM
    regression analysis
    • Replies: 2
    • Views: 850
    05-26-2017, 01:20 AM Go to last post
  52. Question Interpretation of Logistic Regression with Python, Pandas & Statsmodel

    Hi guys, I am new to regression analysis and I am trying to figure out how to interpret my results. I basically did a logit regression in Python...

    Started by thenewcat‎, 05-23-2017 04:16 PM
    • Replies: 8
    • Views: 787
    05-24-2017, 03:30 PM Go to last post
  53. Bootstrapping pairwise not listwise, a problem with N

    Hi! Hoping someone more statistically minded can help. I have a number of variables with different N (they are performance measures and some...

    Started by walrusandpossum‎, 05-23-2017 11:40 PM
    bootstrapping, correlation analysis, regression analysis
    • Replies: 1
    • Views: 483
    05-24-2017, 11:01 AM Go to last post
  54. Clustering

    i) T/F:Principal Components Analysis can be used to create a low dimensional projection of the data for use with clustering. For this one above, I...

    Started by maryjkluther23‎, 05-24-2017 03:25 AM
    regression
    • Replies: 0
    • Views: 435
    05-24-2017, 03:25 AM Go to last post
  55. SAS question

    Hi all, I was stuck on the following. I explained it below, my approach, and would appreciate any help. Thanks so much. 1) T/F: Common factors...

    Started by maryjkluther23‎, 05-24-2017 03:20 AM
    • Replies: 0
    • Views: 443
    05-24-2017, 03:20 AM Go to last post
  56. Exponential Smoothing and how it Relates to Changing Seasonality Cycle Intervals

    How does exponential smoothing treat seasonality when there are different time intervals to the seasonality. It seems that I have to designate a...

    Started by TollemG‎, 05-23-2017 04:01 PM
    • Replies: 0
    • Views: 399
    05-23-2017, 04:01 PM Go to last post
  57. Exclamation Problem with results in ordinal regression...

    Hello and thanks in advance for any response... I have 60 likert-type questions (5 items) (and their responses of course...) and age. Age as raw...

    Started by Afrodite‎, 05-15-2017 09:42 AM
    ordinal regression
    • Replies: 3
    • Views: 687
    05-22-2017, 08:44 PM Go to last post
  58. Linear regression / trend question - basic question

    Sorry for basic question: I have a series of measurements taken at weekly intervals for a period of 20 weeks. Each measurement is a proportion:...

    Started by tonytheviking‎, 05-16-2017 03:20 AM
    • Replies: 6
    • Views: 742
    05-19-2017, 09:07 AM Go to last post
  59. Question Whats is the method to analyze characteristics from two groups?

    Hello there, Im new in the statistics world and i hope that you can help me. i have two groups of sample that are divided by one y (depended)...

    Started by Paulo663636‎, 05-18-2017 09:21 PM
    cluster, grouo, model, predictive
    • Replies: 3
    • Views: 554
    05-19-2017, 08:25 AM Go to last post
  60. Having trouble with my units in regression analysis.

    Hello, I am attempting to regress future currency returns against changes in economic variables (GPD, inflation, index values etc). I am having some...

    Started by regressor96‎, 05-17-2017 05:07 PM
    • Replies: 0
    • Views: 445
    05-17-2017, 05:07 PM Go to last post

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