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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Cross validation

    Hello, I have a basic question about cross validation and regression model. what is the final regression model made from? I mean the final model...

    Started by Bahareh‎, 10-01-2015 03:53 AM
    • Replies: 5
    • Views: 1,215
    10-01-2015, 12:07 PM Go to last post
  2. how to calculate co-efficients

    Hi all, This is my first post on this forum. Lets say I have, x vectors (-0.0028, 5.0028, 10.0085, 15.0085, 20.0028) y vectors (0, 5, 10, 15,...

    Started by hemnath‎, 09-25-2015 05:48 AM
    • Replies: 7
    • Views: 1,349
    09-30-2015, 10:10 PM Go to last post
  3. How to treat missing IV cases in logistic regression?

    Hey folks, quick question: I am analyzing consumers advertising click behavior (click/no-click =DV) and two IVs in this model are the location of...

    Started by oniontoast‎, 09-30-2015 10:52 AM
    • Replies: 4
    • Views: 931
    09-30-2015, 01:38 PM Go to last post
  4. Estimate or Contrast Statement in ANOVA

    Hey, I was asked to review a student's paper. In it they have 2 exposures groups and multiple continuous outcomes they are examining. They...

    Started by hlsmith‎, 09-30-2015 09:39 AM
    • Replies: 1
    • Views: 658
    09-30-2015, 11:00 AM Go to last post
  5. Confused about how to proceed

    Hi all, I have Y vectors = (0, 5, 10, 15, 20) At Condition1, x Vectors = (-0.0056, 5.0000, 10.0057, 15.0057, 20.0000) At Condition2, x vectors =...

    Started by hemnath‎, 09-26-2015 12:32 AM
    • Replies: 1
    • Views: 557
    09-30-2015, 02:51 AM Go to last post
  6. Normal logistic regression vs a mixed model; which to use? benefits gained?

    I have some evidence to suggest that one vaccine was far superior over another and resulted in the local elimination of a disease. Because it affects...

    Started by Johann Kotze‎, 09-18-2015 09:48 AM
    health research, logistic regression, mixed model
    • Replies: 6
    • Views: 1,165
    09-29-2015, 11:23 AM Go to last post
  7. Linear, step wise regression vs binary logistic regression - which method to choose

    Dear friends I have a dilemma about choosing a right logistical method. i want to find predictor factors of life satisfaction and have 5...

    Started by badibad‎, 09-28-2015 05:33 PM
    • Replies: 7
    • Views: 1,121
    09-29-2015, 07:46 AM Go to last post
  8. Use predicted values or residuals in the second stage?

    Hello all: I have a panel dataset (firms) in which some variables are "choice" variables (that is, they reflect executives' free choices as well...

    Started by jayhawk‎, 09-28-2015 06:29 PM
    endogeneity, panel data, predicted values, residuals, two stage model
    • Replies: 0
    • Views: 435
    09-28-2015, 06:29 PM Go to last post
  9. Strange results in univariable linear regression when groups are stratified

    Dear Forum users, I am stuck with some unusual results and would appreciate some ideas as to why/how this happened. Iím testing the relationship...

    Started by MHS‎, 09-27-2015 06:15 AM
    simpson's paradox
    • Replies: 1
    • Views: 964
    09-27-2015, 07:18 AM Go to last post
  10. Poisson model on moving averages: non-discrete

    I have a model that is based on counts of cases. It follows a poisson distribution quite well but we are unhappy about the results of the model. In...

    Started by Johann Kotze‎, 09-26-2015 04:21 AM
    continuous variable, poisson
    • Replies: 1
    • Views: 952
    09-26-2015, 05:45 AM Go to last post
  11. Regression and imputing zeros

    Hi all! I have what is likely a simple regression problem. I am imputing Variable X from survey Y to survey Z. I am using a simple linear...

    Started by domwebber‎, 08-28-2015 03:55 AM
    hotdeck, imputation, linear regression, stata 12
    • Replies: 2
    • Views: 1,077
    09-24-2015, 02:16 PM Go to last post
  12. Question If B predicts A, can A also predicts B?

    Hi everyone, I'm new to multiple regression analysis. I have a question and I hope someone can help answer it. Thank you. In a multiple regression...

    Started by statsnewbie28‎, 09-23-2015 11:04 AM
    dependent variable, multiple regression, predictors
    • Replies: 9
    • Views: 1,781
    09-24-2015, 12:55 PM Go to last post
  13. How to deal with repeated measures data in multiple linear regression?

    Hello, I am a novice in the area of regression analyses, and was hoping someone could shed some light on my situation. I will be conducting a...

    Started by tylerbweaver‎, 09-22-2015 09:56 AM
    • Replies: 8
    • Views: 1,115
    09-22-2015, 03:51 PM Go to last post
  14. Is it linear regression ?

    Hello , according to https://en.wikipedia.org/wiki/Polynomial_regression#Definition_and_example the equation is linear regression . I...

    Started by civilized‎, 09-22-2015 04:07 AM
    • Replies: 2
    • Views: 883
    09-22-2015, 10:54 AM Go to last post
  15. Help with First Differencing in STATA

    Hello I am a student working with STATA for the first time. I am using panel data for the English Premier League football from 2010 to 2015 and am...

    Started by Ekhanolkar18‎, 09-21-2015 05:45 PM
    first difference, panel data
    • Replies: 1
    • Views: 987
    09-22-2015, 02:43 AM Go to last post
  16. Correcting for regression to the mean in mixed effects model of longitudinal data?

    Hey everyone, I know you can correct for regression to the mean for two time points, in a before and after scenario. But does anyone know how to...

    Started by imahumaneater‎, 09-21-2015 02:35 PM
    correlation, longitudinal data, mixed effects, random effects, regression to the mean
    • Replies: 0
    • Views: 676
    09-21-2015, 02:35 PM Go to last post
  17. Time Series Regression Approach

    My goal is to predict monthly S&P 500 values using a single indicator data set (For example, Unemployment Rates ) My approach has been to extract...

    Started by kimberly_h_1986‎, 09-20-2015 01:41 PM
    speculative markets
    • Replies: 1
    • Views: 665
    09-20-2015, 04:52 PM Go to last post
  18. Linear mixed models? MANOVA? I'm confused...

    Iím a newbie in statistics and R, so I hope that my question isnít too banal for you. Iím going to carry out an experiment in order to verify...

    Started by piravi1980‎, 09-20-2015 01:44 PM
    • Replies: 0
    • Views: 562
    09-20-2015, 01:44 PM Go to last post
  19. Reporting the formula for a mixed model in a paper

    I want to report the basic formula of my mixed model. Everywhere I look for a template the equations seem way too complicated for a journal whose...

    Started by Johann Kotze‎, 09-20-2015 03:41 AM
    mixed model
    • Replies: 1
    • Views: 612
    09-20-2015, 07:08 AM Go to last post
  20. Unhappy Please help me run my data by probit regression

    I have a data for my lesson, but i can not run it in probit. I can not understand the total observed in probit what it is. Or help my run by probit...

    Started by ongquangthai‎, 09-17-2015 09:22 PM
    • Replies: 2
    • Views: 1,263
    09-18-2015, 07:35 AM Go to last post
  21. Question Spatial econometrics:heteroskedasticity and autocorrelation consistent(HAC) estimator

    Good afternoon, I have quite basic question however I would like to be sure in this. If I use a HAC estimator of the variance-covariance (VC)...

    Started by Melisandre‎, 09-18-2015 07:13 AM
    • Replies: 0
    • Views: 733
    09-18-2015, 07:13 AM Go to last post
  22. reading excel file /text file in R

    I am naive programmer..i am working on regression analysis. when i say read.table("filename.txt",header=FALSE)..where does R searches for the file?...

    Started by scuby‎, 09-17-2015 02:00 PM
    • Replies: 6
    • Views: 953
    09-17-2015, 10:25 PM Go to last post
  23. Stepwise Logit Regression - Drop of variables

    Dear All, I have a small question I hope you could help me with. I am trying to find a predictive model for a dataset doing a stepwise logit...

    Started by Speku‎, 09-13-2015 09:57 PM
    drop variables, stata, stepwise regression
    • Replies: 0
    • Views: 797
    09-13-2015, 09:57 PM Go to last post
  24. Lightbulb Binary predictor in regression analysis?

    I have just had a lecture with a lecturer summarizing regression analysis, and showed us some examples. One of those examples included a regression...

    Started by Lukan27‎, 09-11-2015 11:38 AM
    • Replies: 4
    • Views: 1,105
    09-12-2015, 11:23 AM Go to last post
  25. Is R2 of multiple linear regression with 1 sign. predictor = R2 of simple lin. regr?

    Hi everyone I always thaught that the resulting R^2 of a multiple linear regression with only 1 significant predictor would be equal to the...

    Started by wep‎, 09-10-2015 05:21 AM
    • Replies: 11
    • Views: 1,742
    09-10-2015, 10:52 AM Go to last post
  26. how to prove COV(y bar, estimated beta1) in linear regression equals 0

    Yi=Xi*beta1 + beta0 + error Prove: COV(average of Yi, estimated beta1) = 0 Thanks!

    Started by hehe1223‎, 06-27-2010 07:30 PM
    2 Pages
    1 2
    • Replies: 24
    • Views: 33,246
    09-10-2015, 12:27 AM Go to last post
  27. Least Squares

    Delete. Unhelpful responses.

    Started by Dave Brunner‎, 09-08-2015 08:20 PM
    • Replies: 8
    • Views: 1,880
    09-09-2015, 06:21 PM Go to last post
  28. control for confounding variables using logistic regression

    Hello... I'm in a project to investigate the prevalence of intrusive thoughts in patients diagnosed with major depressive disorder and non-clinical...

    Started by vahid1990‎, 09-06-2015 08:34 AM
    • Replies: 6
    • Views: 1,092
    09-08-2015, 03:39 PM Go to last post
  29. Help with multiple dummy variable regression.

    I am attempting to forecast claim denials, whether it will ultimately be adjusted off or not. I am running all the data through excel. The...

    Started by mdo8105‎, 09-08-2015 12:51 PM
    dummy variable, forecast, multiple regression
    • Replies: 0
    • Views: 494
    09-08-2015, 12:51 PM Go to last post
  30. Unhappy Is this a case for Mixed Model Anova?

    HI, My study has 2 IV's each with two levels (2 hull designs and 2 techniques) = 4 conditions, and has 3 subjects. Max acceleration data was...

    Started by Wetninja‎, 09-06-2015 12:12 PM
    mixed anova, multiple datasets
    • Replies: 0
    • Views: 660
    09-06-2015, 12:12 PM Go to last post
  31. Logistic regression- choosing sample

    Hi, I am writing my dissertation and will use a binary outcome variable (decision of a country to sanction other states or not). I was planning to...

    Started by laurafv‎, 09-06-2015 10:41 AM
    • Replies: 0
    • Views: 633
    09-06-2015, 10:41 AM Go to last post
  32. Post Linear regression: Prais-winsten method in SPSS with confidence intervals

    Hello Any help greatly appreciated.... I've conducted a linear regression but as the data is autocorrelated (Durbin Watson = 0.5) I wanted to...

    Started by alexisg‎, 09-06-2015 07:07 AM
    prais-winsten, regression, spss 22
    • Replies: 0
    • Views: 1,184
    09-06-2015, 07:07 AM Go to last post
  33. How do I compare the strength of relationships across three groups (in SPSS)?

    Hi everyone, I have data from three countries (US, Spain, and Germany), and ran a separate mediation analysis for each one using four variables:...

    Started by socks_on‎, 09-03-2015 01:59 PM
    spss
    • Replies: 0
    • Views: 690
    09-03-2015, 01:59 PM Go to last post
  34. Dealing with multicollinearity

    I have a following model: y=a+b1x1+b2x2+b3x1x2+b4x3+other terms $ Let's say, I am only interested in coefficient b3. The magnitude of coefficient...

    Started by smith.shrestha‎, 09-03-2015 06:53 AM
    multicollinearity, multiple regression
    • Replies: 4
    • Views: 838
    09-03-2015, 10:19 AM Go to last post
  35. Error from calculation of X from Y response in linear regression

    Hello, I have what I am pretty sure is a simple problem that I can't get a hold on and could use some help! I am sampling air and using a gas...

    Started by pom134‎, 09-03-2015 08:28 AM
    • Replies: 1
    • Views: 636
    09-03-2015, 09:19 AM Go to last post
  36. Correlation for a sample with constant dependent variable

    Hello everyone, I hope I got the right subforum! I would really appreciate if someone takes the time to help me and guide me into th right...

    Started by Subra‎, 09-03-2015 09:11 AM
    • Replies: 0
    • Views: 793
    09-03-2015, 09:11 AM Go to last post
  37. Key driver analysis on customer satisfaction (CSAT)

    I have following data from a survey: 1) Customer satisfaction scores (scale 0-10) 2) Indication of which 3 service aspects respondents give...

    Started by Gert Van Dessel‎, 09-03-2015 02:33 AM
    customer satisfaction, key driver analysis, root cause analysis
    • Replies: 0
    • Views: 1,864
    09-03-2015, 02:33 AM Go to last post
  38. help required urgent

    A sample of 12 homes sold last month in Minot is selected. Can we conclude that as the size of the home (in square footage) increases, the selling...

    Started by saima1‎, 09-01-2015 01:22 AM
    regression homework
    • Replies: 9
    • Views: 1,713
    09-02-2015, 08:15 AM Go to last post
  39. Regression - What to do with insignificant variables?

    Please pardon me if you find this question very silly but this doubt has been troubling me for some time now whenever I want to run a regression. ...

    Started by abhi1495‎, 09-01-2015 03:27 PM
    insignificant, regression analysis, variables
    • Replies: 2
    • Views: 1,734
    09-02-2015, 02:30 AM Go to last post
  40. Multinomial Logistic Regression - Interaction Effect

    Hello there, I would appreciate it very much if someone could help. In my study, participants saw a picture of a man or woman either with or...

    Started by lost_in_statistics‎, 09-01-2015 12:32 PM
    interaction effect, multinomial logistic
    • Replies: 2
    • Views: 757
    09-01-2015, 05:46 PM Go to last post
  41. Website Visits and Marketing Spend and their correlation with Sales

    Hello, My company wants to find a correlation between website visits and marketing spend between sales. Essentially, are website visits or spend a...

    Started by Leandro‎, 08-28-2015 07:11 PM
    • Replies: 0
    • Views: 819
    08-28-2015, 07:11 PM Go to last post
  42. Help with multiple regression and spark/spss

    Hello, I am trying to create a program in spark that will run a multiple regression for my master's dissertation. I am using the standard formula...

    Started by spinecho‎, 08-28-2015 03:24 AM
    • Replies: 0
    • Views: 645
    08-28-2015, 03:24 AM Go to last post
  43. Regression w/ dummy variables

    I'm looking to conduct regression analysis using three dummy variables for independent variables: (1) ethnicity, (2) GLOBE category (i.e. country of...

    Started by tedmitt‎, 08-27-2015 09:26 PM
    • Replies: 0
    • Views: 804
    08-27-2015, 09:26 PM Go to last post
  44. How to regress data

    Hi, I would like to do a simple regression one variable on a dependent variable. Specifically, I would like to regress a financial ratio such as ROE...

    Started by StatisticsNewbie12‎, 08-27-2015 12:59 PM
    • Replies: 0
    • Views: 897
    08-27-2015, 12:59 PM Go to last post
  45. Regression analysis for the influence one result has on the results of another test

    Hi There, My name is Jordan and Iím a physiotherapist working in London. I have taken over study from a colleague and have been given the data...

    Started by jordanwb‎, 08-27-2015 08:15 AM
    • Replies: 0
    • Views: 487
    08-27-2015, 08:15 AM Go to last post
  46. Mediation Analysis With Longitudinal/Multilevel Data

    Hi All, I'm trying to determine if it's possible to conduct mediation analysis on three-level data. I have data with repeated measures at five...

    Started by Colonel‎, 08-26-2015 09:05 PM
    • Replies: 0
    • Views: 1,283
    08-26-2015, 09:05 PM Go to last post
  47. Setting an experiment with ordered categories as predictors

    I am trying to apply a multi-factorial regression analyses on a model with 4 different predictors each of which can have four different weights as...

    Started by Ines77‎, 08-26-2015 03:16 PM
    categorical predictors, categorical variables, regression analysis
    • Replies: 1
    • Views: 767
    08-26-2015, 03:52 PM Go to last post
  48. Is GLM to best for my data

    Hello I want to look at abundance of fleas on their hosts, so there are zero counts. I have looked and found that GLM with family = poisson and...

    Started by Pippy34‎, 08-26-2015 01:01 AM
    • Replies: 2
    • Views: 853
    08-26-2015, 01:48 PM Go to last post
  49. Regressional on likert scale data using spss

    Hi guys, I am in a fix!!:confused:. My questionnaires have recently been filled but am yet to figure out how to analyze my data. My topic is "impact...

    Started by thega‎, 04-04-2011 06:59 AM
    • Replies: 2
    • Views: 6,071
    08-26-2015, 08:56 AM Go to last post
  50. Alternative for a multi-level analysis

    Hi all, For my criminology thesis I am analysing police interviews and would like to research the effect (the presence of) an attorney has on...

    Started by Aeleanor‎, 08-25-2015 08:15 AM
    analysis, logistic, multi-level, nested, regression
    • Replies: 1
    • Views: 815
    08-25-2015, 10:13 AM Go to last post
  51. Interpreting my regression results

    Hi all, i'm running a panel regression using stata. i wanted to test whether there are indeed region fixed effects (FE) that reside in my data...

    Started by proby2‎, 08-23-2015 04:05 PM
    • Replies: 0
    • Views: 651
    08-23-2015, 04:05 PM Go to last post
  52. Exclamation Multiple Regression: 3 levels in IV of interest, how to compare between all 3?

    Hi all, I would like to test the following and am hoping to get some assistance as I am new to regression: DV - Brain volume IV - Participant...

    Started by michikoc‎, 08-22-2015 11:52 PM
    ancova, multiple regression, regression
    • Replies: 0
    • Views: 648
    08-22-2015, 11:52 PM Go to last post
  53. Fixed effect Model

    dear all, I am having problems with the fixed effect model. In a nutshell, I am analysing the impact of disasters within families with regard...

    Started by Heike C.‎, 08-22-2015 08:08 AM
    • Replies: 0
    • Views: 752
    08-22-2015, 08:08 AM Go to last post
  54. Hierarchical regression for a complex model

    So I am testing my own model but it is more complex than I have dealt with before. I know I need hierarchical regression, and I'm using SPSS (I have...

    Started by cp349‎, 08-21-2015 03:45 PM
    hierarchical, mediators, model, moderators, regression
    • Replies: 0
    • Views: 566
    08-21-2015, 03:45 PM Go to last post
  55. Regression to the mean for discrete non normal data

    Hello At work an initiative was started that attempted to reduce the number of Emergency department attendances by frequent users. I have a set...

    Started by MrScotchpie‎, 08-21-2015 07:59 AM
    • Replies: 1
    • Views: 717
    08-21-2015, 02:09 PM Go to last post
  56. Logistic Regression

    Hello, I'm currently working on a churn modelling exercise that uses logistic regression. The challenge that i'm facing now is that the model is...

    Started by JustinG‎, 08-20-2015 03:34 AM
    churn, logistic regression, predictive analysis, sample
    • Replies: 2
    • Views: 808
    08-21-2015, 04:11 AM Go to last post
  57. Variation of Gauss - Markov theorem

    Hi all, I was wondering what happens to the proof and the results of the Gauss - Markov theorem, if one hypothesis is changed and so if the...

    Started by StatsFX‎, 08-19-2015 10:13 AM
    • Replies: 0
    • Views: 566
    08-19-2015, 10:13 AM Go to last post
  58. Logistic Regression

    Hello I am going to start building a Logistic Regression model based on medical data for the purpose of classification. My problem started with...

    Started by osamastat‎, 08-15-2015 05:44 AM
    • Replies: 4
    • Views: 1,291
    08-16-2015, 01:37 PM Go to last post
  59. Confounder

    What if I see a 10% change (decrease) in an variable effect (X1 on Y) when including another variable (X2), though the effect of X1 is never remotely...

    Started by hlsmith‎, 08-13-2015 04:12 PM
    • Replies: 3
    • Views: 943
    08-16-2015, 11:16 AM Go to last post
  60. Can I draw an interaction plot using Generalised Estimating Equations (GEE)?

    Hello, Can I draw an interaction plot using Generalised Estimating Equations (GEE)? If yes, how? Thanks.

    Started by Paulius‎, 08-16-2015 09:42 AM
    regresion analysis, statistics
    • Replies: 0
    • Views: 484
    08-16-2015, 09:42 AM Go to last post

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