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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Fill in multiple missing values given correlation matrix

    I have a correlation matrix: mat <- round(cor(mtcars), 2) mpg cyl disp hp drat wt qsec vs am gear carb mpg 1.00...

    Started by trinker‎, 04-26-2016 09:51 AM
    2 Pages
    1 2
    • Replies: 16
    • Views: 2,162
    05-01-2016, 09:39 PM Go to last post
  2. Post Linear Regression Interpretation

    Hi there, I am running a Multiple Linear Regression analysis. I have 2 predictor variables (self-worth and self-acceptance) and 1 criterion...

    Started by vanessak93‎, 05-01-2016 08:21 PM
    interpretation, linear regression, multiple regression, psychology statistics, regression
    • Replies: 4
    • Views: 1,073
    05-01-2016, 08:38 PM Go to last post
  3. Multinomial logit / time-series fixed effects / multivariate regression: Which one?

    As part of a larger study, we have collected a wealth of data on the interactions customers engage in when buying and using a service. ...

    Started by Niklas B.‎, 05-01-2016 05:50 AM
    multinomial logit, multivariate regression, time-series fixed effects
    • Replies: 0
    • Views: 539
    05-01-2016, 05:50 AM Go to last post
  4. Logistic reg w/ ratio as predictor

    Is there anything I need to know when using a ratio as an independent variable in the model. Is it better to use log(ratio) ? Not an easy web...

    Started by hlsmith‎, 04-30-2016 01:34 PM
    • Replies: 1
    • Views: 639
    04-30-2016, 02:22 PM Go to last post
  5. Question [Logistic Analysis] How does SPSS calculate the 0.5 Cut-Point?

    I am interested in determining the classification accuracy of an outcome (binary DV - whether a participant has capacity or not to make a legal...

    Started by szuscak‎, 04-29-2016 05:25 PM
    cut-point, logistic regression
    • Replies: 0
    • Views: 673
    04-29-2016, 05:25 PM Go to last post
  6. Multivariate analysis, canonical correlation

    Hello, I conducted an experiment with 18 subjects who participated in a simulator experiment. Each participant had to perform a task with 6...

    Started by aapje123‎, 04-28-2016 09:08 AM
    • Replies: 0
    • Views: 745
    04-28-2016, 09:08 AM Go to last post
  7. Thumbs down Interpretation of coefficients, dependent variable in (%), independent variable in ln

    Hi, I have a very simple question. I have the following equation. My dependent variable is CRES which is the share of renewables in a country's...

    Started by Rex‎, 04-28-2016 07:07 AM
    dependent var, independent variable, log linear, regression coefficent
    • Replies: 0
    • Views: 483
    04-28-2016, 07:07 AM Go to last post
  8. Problem with replicating a paper

    I'm having some trouble at replicating this paper (text here: http://www.michiganjb.org/issues/52/text52c.pdf) The paper wants to assess the economic...

    Started by Luc.a‎, 04-28-2016 04:29 AM
    • Replies: 0
    • Views: 441
    04-28-2016, 04:29 AM Go to last post
  9. Writing down firth logistic regression equation

    Hi, This is a really simple question that I'm sort of embarrassed I can't answer - how would you write down a firth logistic regression? Now to...

    Started by Wendero‎, 04-25-2016 10:01 PM
    • Replies: 6
    • Views: 812
    04-27-2016, 12:59 PM Go to last post
  10. GLS (Generalized least Squares) STATA

    generalized least squares (GLS) is a technique for estimating the unknown parameters in a linear regression model. GLS (Generalized least Squares)...

    Started by OlhDt_semarang‎, 04-27-2016 05:16 AM
    • Replies: 0
    • Views: 688
    04-27-2016, 05:16 AM Go to last post
  11. Regression with stratified data: What to do?

    Hi, I want to model a bird population in a country via regression analysis (Poisson regression due to count data). In order to optimize the...

    Started by mmercker‎, 04-27-2016 03:39 AM
    regression analysis, stratification, stratified sampling, weights
    • Replies: 0
    • Views: 684
    04-27-2016, 03:39 AM Go to last post
  12. Minimum number of cases for the reference level

    Before I ask this I have the true population so I am not sure this issue even applies :p Is there a minimum number of cases the reference level...

    Started by noetsi‎, 04-25-2016 01:22 PM
    • Replies: 7
    • Views: 1,009
    04-26-2016, 03:59 PM Go to last post
  13. Regression to compare mean differences?

    Hi everyone, I am doing a project with two different groups (clinical and control). I want to compare their scores on a couple of variables (ex:...

    Started by DefenceDoom‎, 04-25-2016 05:35 PM
    ancova, mean differences, regression
    • Replies: 1
    • Views: 923
    04-26-2016, 06:23 AM Go to last post
  14. Question Multiple, hierarchal regression - division of p-value?

    Hey everybody! I am pretty new to this forum and also to statistics. In these days I try to analyze the data for my Bachelor thesis. I study...

    Started by Mindfull‎, 04-26-2016 01:34 AM
    covariates, p-value, regression
    • Replies: 0
    • Views: 516
    04-26-2016, 01:34 AM Go to last post
  15. zero value of the regression parameter

    Hello. I would like to ask if anyone knows a website with the theme: regression testing parameter. I need only theory on the topic (to school). Just...

    Started by Dominik556‎, 04-25-2016 09:51 AM
    • Replies: 5
    • Views: 625
    04-25-2016, 09:33 PM Go to last post
  16. Cochrane Orcutt Eviews 9

    Cochrane Orcutt estimation is a procedure in econometrics, which adjusts a linear model for serial correlation in the error term. It is named after...

    Started by OlhDt_semarang‎, 04-24-2016 09:57 PM
    • Replies: 0
    • Views: 1,259
    04-24-2016, 09:57 PM Go to last post
  17. Multiple Regression with Ratio as Independent Variable

    I am doing a multiple regression and want to use a ratio (number of support staff to number of students) as an independent variable. Does dividing...

    Started by CounselorHenry‎, 04-24-2016 09:48 PM
    independent variable, multiple regression, ratios
    • Replies: 0
    • Views: 447
    04-24-2016, 09:48 PM Go to last post
  18. Positive Pearson Correlation but negative coefficient

    Dear All I am trying to create a regression model for estimating electricity demand. The independent variables considered are population and GDP....

    Started by Ravita‎, 04-24-2016 07:39 PM
    • Replies: 0
    • Views: 950
    04-24-2016, 07:39 PM Go to last post
  19. Newbie in trouble (is regression the right way to go here?)

    Hi there! (background, skip if wanted) New member here. Finance student with an exciting area to write a paper about but I have not taken any...

    Started by FinanceBug‎, 04-21-2016 04:36 AM
    • Replies: 0
    • Views: 709
    04-21-2016, 04:36 AM Go to last post
  20. Likert Scale as dependent variable

    Hi all, I have a question regarding the analysis of my survey data. I have created one variable of seven likert scale variables after conducting...

    Started by StefanSprenger‎, 04-19-2016 04:07 PM
    • Replies: 9
    • Views: 1,919
    04-20-2016, 04:11 PM Go to last post
  21. Linear regression with all categorical variables SPSS

    Hello, I am running a multivariate regression analysis on the presence of an organism in an infection (dependent variable), and certain risk factors...

    Started by ssrx‎, 04-18-2016 07:32 PM
    • Replies: 4
    • Views: 553
    04-20-2016, 12:49 PM Go to last post
  22. Regression Misconceptions

    Dear all, Just wanted to clear some misconceptions I have about regression analysis. Your help would be highly appreciated :) 1) One of the...

    Started by majortom88‎, 04-19-2016 02:44 PM
    • Replies: 1
    • Views: 601
    04-19-2016, 03:17 PM Go to last post
  23. Question Factor scores as independent variables in multiple regression

    I'm checking that I have understood this right. Factor scores must be achieved via oblique rotation, because factor scores must be allowed to...

    Started by zxc‎, 04-19-2016 11:25 AM
    • Replies: 0
    • Views: 447
    04-19-2016, 11:25 AM Go to last post
  24. Question Graphically check linearity in logit regression

    Hi all, I am running a logit regression where the outcome variable is binary. I am interested in checking, graphically, whether the relationship...

    Started by Phaedrus‎, 07-21-2014 07:50 AM
    2 Pages
    1 2
    • Replies: 24
    • Views: 11,101
    04-19-2016, 10:59 AM Go to last post
  25. Can covariates be random variables? (logit)

    Hi Everyone. I have been discussing a project at work. My colleague said that he is going to estimate a logit model and include as a covariates...

    Started by harel‎, 04-17-2016 05:50 AM
    • Replies: 5
    • Views: 1,016
    04-18-2016, 05:32 PM Go to last post
  26. Confounder confounds at only one level of polytomous variable

    Hello! I have looked for a post on this but have been unsuccessful. It would be great if you could help. I am using logistic regression in SAS. ...

    Started by rkw‎, 04-16-2016 06:35 PM
    confounding, polychotomous, polytomous
    • Replies: 0
    • Views: 558
    04-16-2016, 06:35 PM Go to last post
  27. Question about dummy variables

    Hi Guys, So I am doing a project for a class, and had a question on how to interpret something on my SPSS. I am designing a multivariate regression...

    Started by patslee6‎, 04-16-2016 10:47 AM
    • Replies: 0
    • Views: 739
    04-16-2016, 10:47 AM Go to last post
  28. Using weights in regression

    I don't really understand this argument. I thought you had to use weights in regression always when you were not randomly sampling. But this argues...

    Started by noetsi‎, 04-15-2016 12:37 PM
    • Replies: 2
    • Views: 759
    04-15-2016, 02:12 PM Go to last post
  29. Is correction for attenuation in my regression analysis necessary?

    Hi everyone, I'd like to know if I should consider a correction for attenuation in a multiple regression I'd like to run on my data. Here's...

    Started by majortom88‎, 04-11-2016 01:53 PM
    • Replies: 7
    • Views: 1,346
    04-15-2016, 04:39 AM Go to last post
  30. Relative impact of predictors in linear regression

    I want to rank variables from most to least important, in terms of impact on the DV. My predictors are either interval or dummy. My DV is interval. I...

    Started by noetsi‎, 04-11-2016 11:08 AM
    • Replies: 8
    • Views: 1,542
    04-14-2016, 09:02 AM Go to last post
  31. Generating random estimates

    I have 5 years worth of actual monthly data. I want to "predict" (examine really) possible values 12 months into the future. I don't want to be...

    Started by fred3‎, 04-13-2016 03:55 PM
    • Replies: 0
    • Views: 633
    04-13-2016, 03:55 PM Go to last post
  32. Seemingly unrelated regression in R with many variables

    Hey! I'm sitting here with a data frame with over 100 variables and I'm supposed to model my 8 dependent variables with seemingly unrelated...

    Started by JagarSUR‎, 04-13-2016 07:08 AM
    • Replies: 0
    • Views: 632
    04-13-2016, 07:08 AM Go to last post
  33. A purely conceptual question

    Assume a logisitc regression model includes a continuous variable like age and a categorical variable like gender and an interaction term for these. ...

    Started by gmcbeen‎, 04-12-2016 05:30 PM
    • Replies: 0
    • Views: 693
    04-12-2016, 05:30 PM Go to last post
  34. Comparison of regression coefficients between (nested) geographic regions

    Hi All, I would like to compare the effect of an explanatory variable (say X1) on a response variable (Say Y) between two geographic regions in...

    Started by arun‎, 04-11-2016 08:54 PM
    comparison, regression, standardization
    • Replies: 0
    • Views: 923
    04-11-2016, 08:54 PM Go to last post
  35. Is this a sensible approach for a 3x3 factorial experiment?

    Hi all I'm hoping that someone can let me know whether this is a suitable approach for analysing a dataset. I have a 3x3 factorial design, so 2...

    Started by t.jones‎, 04-08-2016 04:07 AM
    • Replies: 0
    • Views: 1,047
    04-08-2016, 04:07 AM Go to last post
  36. Effect Size in Poisson Reg with a Binary Predictor

    Well, I don't regularly come across count variables as dependent variables. What is the best effect size to report for a Poisson reg model with a...

    Started by hlsmith‎, 04-07-2016 11:12 AM
    • Replies: 2
    • Views: 903
    04-07-2016, 01:26 PM Go to last post
  37. Help with a simple linear regression with a huge backlog of data

    Hi there. I am trying to run a regression that will help me predict Y from X. While this is pretty simple and I have done it already, I have many...

    Started by karan13‎, 04-06-2016 10:09 AM
    • Replies: 1
    • Views: 533
    04-07-2016, 07:16 AM Go to last post
  38. Compare coefficients of two regression models

    Hi, I have a little problem I hope someone can help me with. I run 2 multiple regression models with the same independent variables but...

    Started by Swag1992‎, 04-07-2016 04:15 AM
    • Replies: 1
    • Views: 482
    04-07-2016, 07:10 AM Go to last post
  39. low frequency independent variable in logistic regression

    I'm running a logistic regression and I think there's a variable that I'm not treating properly. I'm modeling traffic accidents (1) vs. no...

    Started by kai_squared‎, 04-05-2016 01:45 PM
    • Replies: 6
    • Views: 1,008
    04-06-2016, 07:06 AM Go to last post
  40. Confused about my Logistic Regression output (SPSS)

    Hi Guys, I've conducted a binary logistic regression using 2 categorical predictors (Static-moving and moving-static) and an outcome variable...

    Started by daveholja‎, 04-05-2016 08:12 AM
    • Replies: 4
    • Views: 722
    04-06-2016, 04:44 AM Go to last post
  41. Information Criterion to compare different linear models

    Dear Community, In order to perform a price forecast, I built four linear models:1-3 have one independent variable, 4 has two independent...

    Started by AntonR‎, 03-30-2016 08:38 AM
    • Replies: 1
    • Views: 587
    04-05-2016, 07:25 AM Go to last post
  42. Multiple Linear Regression Delta R Squared.

    I am conducting a multiple linear regression looking at the predictors of gender and the traits of the dark triad (Narcissism, Psychopathy, and...

    Started by kit191‎, 04-04-2016 08:14 AM
    • Replies: 0
    • Views: 1,369
    04-04-2016, 08:14 AM Go to last post
  43. coefficient variance decomposition test for multicollinearity

    good day, please assist me in interpreting the results of the coefficient variance decomposition test. i am a bit confused; i think the condition...

    Started by Boi‎, 04-03-2016 01:16 PM
    • Replies: 0
    • Views: 1,758
    04-03-2016, 01:16 PM Go to last post
  44. Log-Linear

    Hi all, I have a sample data of Mortality vs GDP. I need to make a Log-linear regression analysis. I transformed the data to log scale and then...

    Started by petros20‎, 04-03-2016 07:08 AM
    log-linear
    • Replies: 0
    • Views: 490
    04-03-2016, 07:08 AM Go to last post
  45. Question Multiple Regression

    I'm supposed to analyze data to see if an implementation fee was followed by a change in passenger volumes over a 4 year period. I've started to...

    Started by Avens10‎, 04-02-2016 11:41 AM
    • Replies: 0
    • Views: 995
    04-02-2016, 11:41 AM Go to last post
  46. Robust regression, bootstrapping and indirect effect

    Hi there, I am currently learning to do mediation analysis using bias-corrected accelerated bootstrap confidence intervals, similar to the...

    Started by Tux‎, 04-01-2016 12:26 PM
    • Replies: 4
    • Views: 925
    04-01-2016, 07:55 PM Go to last post
  47. Lightbulb SOS: Linear Regression

    Hi guys, it's a first time I am doing regressions for my dissertation and really need your help. I haven't been studying econometrics before, so I ...

    Started by teo_megre‎, 04-01-2016 07:10 AM
    • Replies: 0
    • Views: 715
    04-01-2016, 07:10 AM Go to last post
  48. Question How to minimize volatility in dataset?

    Hi guys, We are currently struggling with a bit of an issue with regards to multiple regression. It concerns how to deal with substantial...

    Started by DJB86‎, 03-31-2016 09:46 AM
    • Replies: 2
    • Views: 554
    03-31-2016, 12:31 PM Go to last post
  49. Multiple regression with interaction - and dummy variables?

    Hi guys! So, here's the deal. I'm in a bit of a pickle here :shakehead I'm currently struggling with a take-home exam where I'm having trouble...

    Started by DJB86‎, 03-29-2016 08:55 PM
    • Replies: 9
    • Views: 1,147
    03-31-2016, 09:07 AM Go to last post
  50. Chi Square and Regression

    Hi all, First time post so please go easy on me :p I have a bunch of categorical variables that I am thinking of using as predictor variables...

    Started by Bathy1‎, 03-29-2016 03:09 PM
    • Replies: 3
    • Views: 891
    03-30-2016, 12:18 PM Go to last post
  51. Comparing betas with log transformation of independent variable

    Hi all, I would like to compare the results of three studies. All use linear regression with continuous independent and dependent variables. The...

    Started by orangetrout‎, 03-30-2016 06:35 AM
    • Replies: 0
    • Views: 1,153
    03-30-2016, 06:35 AM Go to last post
  52. Anova find significant diferrences

    Hi all, I have made an one-way anova in order to test if three populations have the same means. My result is to reject the null hypothesis. So,...

    Started by petros20‎, 03-29-2016 12:43 PM
    anova
    • Replies: 4
    • Views: 729
    03-30-2016, 01:17 AM Go to last post
  53. Problem with residual?

    I don't know if this is an issue or not. There are the strange bars on the top and bottom of the residuals - I have never seen anything like this and...

    Started by noetsi‎, 03-29-2016 10:53 AM
    • Replies: 7
    • Views: 985
    03-29-2016, 12:47 PM Go to last post
  54. How to report a non-significant regression?

    Hi guys, For my final year research project, I have a few regression models with non-significant results. I was just wondering what the...

    Started by twinpeaks‎, 03-27-2016 08:38 AM
    • Replies: 4
    • Views: 3,836
    03-29-2016, 03:45 AM Go to last post
  55. Ordinal or Multinomial Regression

    Hi, If I have a variable called time spend following politics with the following possible responses: No time under half an hour a day...

    Started by DGM1‎, 03-28-2016 03:30 AM
    • Replies: 5
    • Views: 797
    03-28-2016, 06:16 PM Go to last post
  56. Logistic regression interpretation

    Can anyone please interpret these results for me i will be highly obliged. Thank you B S.E. Wald Sig. Do you know the doses of every pesticide...

    Started by Farhan‎, 03-26-2016 07:41 AM
    • Replies: 3
    • Views: 857
    03-28-2016, 02:35 PM Go to last post
  57. Basic regressionquestion

    Hi, I am currently learning ML algorithms and implementing in R. I have a some basic questions. 1.)I know that linear regression an statistical...

    Started by chakravarty456‎, 03-28-2016 05:16 AM
    • Replies: 2
    • Views: 677
    03-28-2016, 10:59 AM Go to last post
  58. Instrumental variable approach in case of interacting endogenous predictors

    Hello dear forum members, Suppose I have the following model: y = a + x1 + x2 + z1 + z2 + z1*z2, where y is exponential, x1-x2 are controls,...

    Started by kiton‎, 03-15-2016 12:13 PM
    • Replies: 6
    • Views: 1,134
    03-26-2016, 12:59 PM Go to last post
  59. How to calculate the percentage contribution in full factorial and RSM models

    Hi, My question might seem quiet straight forward but here it goes: How can I calculate the percentage contribution of each input parameter in...

    Started by khalchris‎, 03-25-2016 08:04 PM
    anova, full factorial, rsm
    • Replies: 0
    • Views: 1,070
    03-25-2016, 08:04 PM Go to last post
  60. Proper Interpretation of odds ratio less than 1 for my study

    Hello everyone, This is for a PhD, research in psycholinguistics. I have done logistic regression analyses where some chosen predictor...

    Started by MariaF‎, 07-22-2013 04:08 PM
    2 Pages
    1 2
    odds ratio invertibility, odds ratio less than 1
    • Replies: 18
    • Views: 24,530
    03-25-2016, 03:55 PM Go to last post

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