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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. 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: 390
    04-24-2016, 09:48 PM Go to last post
  2. 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: 775
    04-24-2016, 07:39 PM Go to last post
  3. 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: 632
    04-21-2016, 04:36 AM Go to last post
  4. 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: 1,628
    04-20-2016, 04:11 PM Go to last post
  5. 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: 512
    04-20-2016, 12:49 PM Go to last post
  6. 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: 504
    04-19-2016, 03:17 PM Go to last post
  7. 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: 386
    04-19-2016, 11:25 AM Go to last post
  8. 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: 9,772
    04-19-2016, 10:59 AM Go to last post
  9. 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: 868
    04-18-2016, 05:32 PM Go to last post
  10. 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: 491
    04-16-2016, 06:35 PM Go to last post
  11. 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: 662
    04-16-2016, 10:47 AM Go to last post
  12. 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: 650
    04-15-2016, 02:12 PM Go to last post
  13. 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: 1,156
    04-15-2016, 04:39 AM Go to last post
  14. 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: 1,317
    04-14-2016, 09:02 AM Go to last post
  15. 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: 524
    04-13-2016, 03:55 PM Go to last post
  16. 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: 543
    04-13-2016, 07:08 AM Go to last post
  17. 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: 621
    04-12-2016, 05:30 PM Go to last post
  18. 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: 760
    04-11-2016, 08:54 PM Go to last post
  19. 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: 929
    04-08-2016, 04:07 AM Go to last post
  20. 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: 800
    04-07-2016, 01:26 PM Go to last post
  21. 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: 488
    04-07-2016, 07:16 AM Go to last post
  22. 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: 429
    04-07-2016, 07:10 AM Go to last post
  23. 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: 876
    04-06-2016, 07:06 AM Go to last post
  24. 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: 626
    04-06-2016, 04:44 AM Go to last post
  25. 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: 501
    04-05-2016, 07:25 AM Go to last post
  26. 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: 1,150
    04-04-2016, 08:14 AM Go to last post
  27. 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: 1,509
    04-03-2016, 01:16 PM Go to last post
  28. 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: 443
    04-03-2016, 07:08 AM Go to last post
  29. 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: 832
    04-02-2016, 11:41 AM Go to last post
  30. 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: 820
    04-01-2016, 07:55 PM Go to last post
  31. 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: 612
    04-01-2016, 07:10 AM Go to last post
  32. 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: 501
    03-31-2016, 12:31 PM Go to last post
  33. 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: 1,026
    03-31-2016, 09:07 AM Go to last post
  34. 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: 763
    03-30-2016, 12:18 PM Go to last post
  35. 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: 976
    03-30-2016, 06:35 AM Go to last post
  36. 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: 620
    03-30-2016, 01:17 AM Go to last post
  37. 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: 830
    03-29-2016, 12:47 PM Go to last post
  38. 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: 3,322
    03-29-2016, 03:45 AM Go to last post
  39. 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: 699
    03-28-2016, 06:16 PM Go to last post
  40. 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: 757
    03-28-2016, 02:35 PM Go to last post
  41. 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: 607
    03-28-2016, 10:59 AM Go to last post
  42. 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: 968
    03-26-2016, 12:59 PM Go to last post
  43. 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: 873
    03-25-2016, 08:04 PM Go to last post
  44. 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: 23,091
    03-25-2016, 03:55 PM Go to last post
  45. Bidirectional relationship with longitudinal data: what's the best model?

    N=1000+. I have about 3-4 repetitive measures of a few numerical variables and categorical variables. How do I test the hypothesis that x...

    Started by neuromniscience‎, 03-23-2016 10:37 AM
    • Replies: 3
    • Views: 1,079
    03-23-2016, 09:29 PM Go to last post
  46. Low-prevalence covariates in multiple linear regression analysis

    Is there any problem adding low-prevalence covariates to standard multiple linear regression (spontaneous entry)? For example, I have 1000+...

    Started by neuromniscience‎, 03-22-2016 08:59 PM
    • Replies: 2
    • Views: 517
    03-23-2016, 07:59 PM Go to last post
  47. Post Regression individual and group-level data

    Hi all, I'm testing whether observing behavior leads to copying behavior (monkey see, monkey do) in a team setting. I've collected data from...

    Started by Tijnvanlier‎, 03-22-2016 01:50 PM
    • Replies: 3
    • Views: 703
    03-23-2016, 07:40 PM Go to last post
  48. Smile Predicted Probability

    Someone created a spreadsheet to graph predicted provability values on a Logistic Regression S Graph. There are four values used. a = Assumed...

    Started by R0NR0NS‎, 03-22-2016 10:43 AM
    • Replies: 2
    • Views: 539
    03-22-2016, 05:17 PM Go to last post
  49. Post Compare Correlation Coefficients

    Hi everyone, I currently have to do an empirical work in Stata and need some help. I have a regression in this form and want to compare the...

    Started by Swag1992‎, 03-22-2016 11:31 AM
    • Replies: 0
    • Views: 405
    03-22-2016, 11:31 AM Go to last post
  50. Both categorical and continuous predictors?

    I'm sure this is very simple but I just want to be sure. I have actually been searching the web for a while now and can't seem to find a clear...

    Started by dt87‎, 03-21-2016 01:02 AM
    • Replies: 5
    • Views: 990
    03-21-2016, 04:35 PM Go to last post
  51. Question Help with mixed model?

    I would appreciate some help figuring out how to analyze a new data set I'm collecting. Most of my experience is with linear regression and ANOVA,...

    Started by tbrass‎, 03-19-2016 03:49 PM
    • Replies: 3
    • Views: 733
    03-21-2016, 09:52 AM Go to last post
  52. Dummy variables with categorical data with multiple levels.

    This always seemed easy to me, largely because I always had an obvious reference group before or I was dealing with variables that had only 2 levels....

    Started by noetsi‎, 02-28-2016 07:44 PM
    • Replies: 12
    • Views: 1,532
    03-21-2016, 08:13 AM Go to last post
  53. Logistic regression in SPSS

    I have designed a question and now intend to use SPSS to run regression to analyse the results: My dependent variable is: intention to vote. Yes...

    Started by matthewrog‎, 03-19-2016 11:11 AM
    dummy variable, likert scale, logistic regression, ordinal regression, spss
    • Replies: 0
    • Views: 540
    03-19-2016, 11:11 AM Go to last post
  54. Skew in data

    I have a huge data set, 10,000 points is common. I have significant skew in my data and some large outliers. Some authors argue addressing skew with...

    Started by noetsi‎, 03-14-2016 08:43 AM
    2 Pages
    1 2
    • Replies: 17
    • Views: 1,730
    03-18-2016, 05:06 PM Go to last post
  55. "Sensitivty" analysis

    I have not encountered this before. It occurs in the context of "mixed effects OLS regression" (not sure exactly what type of regression that is...

    Started by noetsi‎, 03-18-2016 01:31 PM
    • Replies: 4
    • Views: 818
    03-18-2016, 04:10 PM Go to last post
  56. Intercept becoming negative(More IDVs)

    Hi All, I have a small query. When regressing revenue against cost, my intercept is positive for X% combos where each combo consists of data...

    Started by vikash_124124‎, 03-18-2016 01:57 AM
    • Replies: 6
    • Views: 669
    03-18-2016, 04:08 PM Go to last post
  57. Introductory references about total least squares

    I am an engineering student and I've been recently told about the Total Least Square (TLS) method. I am interested in applying it to topographic...

    Started by julitocolon‎, 03-18-2016 10:14 AM
    least-squares, orthogonal regression, references, regression, total least squares
    • Replies: 1
    • Views: 343
    03-18-2016, 10:37 AM Go to last post
  58. Partial effect plot: Which options do I have?

    Hi, I have a multiple regression model, and I would like to do an effect plot with confidence bands regarding one of the predictors. One solution...

    Started by mmercker‎, 03-16-2016 11:38 AM
    confidence bands, effect plot, regression plot
    • Replies: 4
    • Views: 910
    03-17-2016, 02:21 AM Go to last post
  59. Cool Research Method questions

    Thanks guys for the response, it was great

    Started by jazeid05‎, 03-15-2016 08:29 PM
    • Replies: 3
    • Views: 590
    03-16-2016, 10:29 AM Go to last post
  60. Prediction Plot with CI's: What to do with covariates?

    Hi, I have a multiple regression model (especially a GLMM), with - outcome Y, - a fixed effect predictor wich is in the main focus of...

    Started by mmercker‎, 03-15-2016 05:21 AM
    confidence interval, partial effect, regression plot
    • Replies: 0
    • Views: 495
    03-15-2016, 05:21 AM Go to last post

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