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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. 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, Yesterday 08:53 AM
    • Replies: 1
    • Views: 129
    Yesterday, 11:16 AM Go to last post
  2. 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: 173
    Yesterday, 07:21 AM Go to last post
  3. 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: 129
    Yesterday, 03:05 AM Go to last post
  4. 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: 82
    07-20-2017, 06:40 AM Go to last post
  5. 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: 266
    07-17-2017, 03:40 AM Go to last post
  6. 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: 90
    07-16-2017, 06:37 PM Go to last post
  7. 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: 184
    07-10-2017, 06:56 PM Go to last post
  8. 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: 233
    07-10-2017, 06:42 PM Go to last post
  9. 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: 242
    07-07-2017, 01:42 AM Go to last post
  10. 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: 292
    07-06-2017, 03:25 AM Go to last post
  11. 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: 135
    07-01-2017, 11:22 PM Go to last post
  12. 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: 242
    06-27-2017, 12:46 PM Go to last post
  13. 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: 296
    06-26-2017, 11:20 AM Go to last post
  14. 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: 151
    06-26-2017, 08:28 AM Go to last post
  15. 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: 165
    06-22-2017, 05:04 PM Go to last post
  16. 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: 306
    06-17-2017, 09:50 AM Go to last post
  17. 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: 311
    06-12-2017, 10:03 AM Go to last post
  18. 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: 405
    06-09-2017, 11:56 AM Go to last post
  19. 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: 297
    06-09-2017, 05:29 AM Go to last post
  20. 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: 169
    06-09-2017, 03:32 AM Go to last post
  21. 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: 172
    06-08-2017, 10:16 PM Go to last post
  22. 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: 257
    06-08-2017, 06:19 PM Go to last post
  23. 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: 321
    06-07-2017, 02:33 PM Go to last post
  24. 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: 356
    06-05-2017, 09:44 PM Go to last post
  25. 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: 312
    06-05-2017, 03:35 PM Go to last post
  26. 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: 381
    06-05-2017, 08:32 AM Go to last post
  27. 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: 1,288
    06-02-2017, 03:24 AM Go to last post
  28. 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: 299
    06-02-2017, 12:10 AM Go to last post
  29. 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: 2,459
    05-31-2017, 04:14 AM Go to last post
  30. 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: 396
    05-30-2017, 05:27 PM Go to last post
  31. 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: 303
    05-30-2017, 11:55 AM Go to last post
  32. 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: 357
    05-30-2017, 09:00 AM Go to last post
  33. Regression

    Hi How I can use regression analysis?

    Started by Kimudao‎, 05-27-2017 11:46 PM
    • Replies: 2
    • Views: 343
    05-28-2017, 09:41 PM Go to last post
  34. 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: 421
    05-28-2017, 06:38 AM Go to last post
  35. 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: 436
    05-27-2017, 01:12 PM Go to last post
  36. 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: 299
    05-26-2017, 09:39 PM Go to last post
  37. 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: 631
    05-26-2017, 01:20 AM Go to last post
  38. 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: 538
    05-24-2017, 03:30 PM Go to last post
  39. 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: 347
    05-24-2017, 11:01 AM Go to last post
  40. 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: 323
    05-24-2017, 03:25 AM Go to last post
  41. 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: 318
    05-24-2017, 03:20 AM Go to last post
  42. 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: 301
    05-23-2017, 04:01 PM Go to last post
  43. 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: 555
    05-22-2017, 08:44 PM Go to last post
  44. 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: 593
    05-19-2017, 09:07 AM Go to last post
  45. 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: 378
    05-19-2017, 08:25 AM Go to last post
  46. 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: 357
    05-17-2017, 05:07 PM Go to last post
  47. Excel - is this a reliable data

    Hello I have got a data set that i am using the regression tool on and I just cant clarify to my self if this data if good enough or not. Nr. 1 :...

    Started by hlynur11‎, 05-16-2017 11:03 AM
    • Replies: 1
    • Views: 354
    05-16-2017, 11:51 AM Go to last post
  48. Variation in significance Categorical Regression Analysis (CATREG)

    Hello, I am doing Categorical Regression Analysis (CATREG) with SPSS. However, every time i run the analysis, the standard error and p-value vary...

    Started by mfi_shakil‎, 05-15-2017 09:44 AM
    catreg, spss
    • Replies: 4
    • Views: 426
    05-16-2017, 11:03 AM Go to last post
  49. Comparing regression coefficients between two groups –> violation of independence?

    Hi all, I have a question about the comparison of regression coefficients of two groups (using SPSS) and I think this is the correct sub forum for...

    Started by greetprofeet‎, 02-11-2017 08:42 AM
    • Replies: 1
    • Views: 1,353
    05-15-2017, 03:47 PM Go to last post
  50. Condition to put regression analysis zero?

    Under what situation intercept can be force to zero in regression analysis?

    Started by Meenakshi Tiwari‎, 05-13-2017 02:34 AM
    • Replies: 11
    • Views: 790
    05-14-2017, 10:36 PM Go to last post
  51. ARIMA estimation technique

    Hello, I am using SAS to forecast with ARIMA. I need to choose between two methods, conditional least Squares and MLE. Which technique do you...

    Started by schteeke1‎, 05-10-2017 07:27 AM
    arima mle cls
    • Replies: 8
    • Views: 710
    05-13-2017, 01:03 PM Go to last post
  52. When the Outcome and Predictor Variables are (sort of) the same

    Hello, everyone, I am working on a study with sensitive information, so it may suffice only to look at the last two paragraphs for my question,...

    Started by w_scheidel‎, 05-12-2017 10:33 AM
    • Replies: 7
    • Views: 545
    05-12-2017, 07:11 PM Go to last post
  53. Regression Analysis Practice

    I'm working through some practice on regression analysis and wanted to confirm. My attempt is below. Thanks (1) The correlation between two...

    Started by shane414‎, 05-08-2017 04:14 AM
    regression analysis
    • Replies: 3
    • Views: 685
    05-10-2017, 12:00 PM Go to last post
  54. Translate multinomial logit regression parameters into binomial

    Hello, I have those parameters from a multinomial logit regression that explains Education (L/M/H) by language (Dominant/Other Europe/Non-European)....

    Started by Demographer‎, 05-10-2017 06:12 AM
    • Replies: 0
    • Views: 315
    05-10-2017, 06:12 AM Go to last post
  55. Regression projects on Minitab (Fit models using transformations)

    I'm using Minitab to do these projects. I start by making a multiple linear regression model and try to transform it using the calculator. I keep...

    Started by biologist21‎, 05-07-2017 01:57 PM
    • Replies: 1
    • Views: 404
    05-08-2017, 06:37 AM Go to last post
  56. Unhappy Regression with summated scale help

    Hi all, I am having struggles with computing a (hierarchical) regression analysis for my data, and i have a feeling this is due to my variables. I...

    Started by janne1994s‎, 05-07-2017 01:52 PM
    dependent variable, hierarchical regression, multiple regression, regression
    • Replies: 1
    • Views: 402
    05-07-2017, 07:31 PM Go to last post
  57. Understanding pairwise correlation

    Maybe it is the current time, but I have some difficulties understanding what my tutor means (and he is gone on vacation so I can't ask). In my...

    Started by Jazz3‎, 05-03-2017 09:56 AM
    • Replies: 6
    • Views: 737
    05-03-2017, 02:44 PM Go to last post
  58. Does endogeneity affect the R-squared estimated in variance partitioning?

    Hi, I have a likely very simple question but I can’t get my head around the answer. I want to estimate which part of the variance in a firm's...

    Started by Peter Schmid‎, 05-02-2017 06:01 PM
    endogeneity, r-squared, variance partitioning
    • Replies: 1
    • Views: 516
    05-03-2017, 11:07 AM Go to last post
  59. follow up analysis for regression

    I ran 20 services we supply to our customers. I controlled for what seemed obvious things like gender, public support, and severity of disability (we...

    Started by noetsi‎, 05-01-2017 02:34 PM
    • Replies: 8
    • Views: 744
    05-02-2017, 12:04 PM Go to last post
  60. Multiple Regression Help !!

    A team of researchers believed that parental expectations (PE), emotionality (E) and fear of negative evaluation (FNE) promoted social anxiety (SA)....

    Started by shevy‎, 04-29-2017 11:23 AM
    • Replies: 2
    • Views: 539
    05-01-2017, 02:37 PM Go to last post

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