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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Testing a log transformed reg model with the non-log transformed

    Hello, I was wondering how one test two regression models against each other. One being the log transformed of the other like this: y = var1 +...

    Started by nanana‎, 10-08-2015 08:30 AM
    • Replies: 6
    • Views: 1,873
    10-10-2015, 02:40 PM Go to last post
  2. lagged variables in a model

    Hi, i am reading an academic article and i am not sure i understood the model correctly. 1. It is written that the dependent variable is...

    Started by ophiroz‎, 09-15-2015 01:04 PM
    • Replies: 4
    • Views: 1,769
    10-10-2015, 09:41 AM Go to last post
  3. Time Series Analysis with Triple exponential smoothing

    What would be the best formula to forecast a weeks worth of daily data?

    Started by mdo8105‎, 10-07-2015 03:16 PM
    • Replies: 3
    • Views: 1,420
    10-07-2015, 04:05 PM Go to last post
  4. AIC backward selection - control variables

    Hej! I have a question concerning AIC backwards selection. I am doing a Linear Mixed effect model where I have one main predictor and several...

    Started by puenktchen‎, 10-06-2015 09:37 AM
    • Replies: 2
    • Views: 1,323
    10-06-2015, 12:26 PM Go to last post
  5. scatter plot for partial regression (in spss)

    Hi all I have an SPSS regression model in which I have a dependent variable, an independent variable and 4 covariates. I want to create a...

    Started by Lee R.‎, 10-06-2015 10:46 AM
    partial regression, partial regression plot, regression, scatter plot, scatterplot
    • Replies: 0
    • Views: 1,912
    10-06-2015, 10:46 AM Go to last post
  6. Leave one out cross validation

    Hi everybody, I've done a linear regression analysis with forward selection method. my number of observations are 32 and the final model selected 2...

    Started by Bahareh‎, 09-27-2015 07:56 AM
    loocv, regression
    • Replies: 3
    • Views: 2,636
    10-06-2015, 01:09 AM Go to last post
  7. Problem with Greene Econometric Analysis 7th Edition demand example page 110

    Strange question, I know, but I am unable to reproduce the results shown when he adds a lagged dependent variable to his gasoline demand function....

    Started by Rod‎, 10-04-2015 09:53 PM
    • Replies: 0
    • Views: 1,334
    10-04-2015, 09:53 PM Go to last post
  8. Automatically finding relationships between 3 or more variables

    Hello, Total newbie here - but I'm hoping someone can help me out. I have finished running a multiple regression analysis and have my results....

    Started by Tzo‎, 10-02-2015 07:37 PM
    • Replies: 0
    • Views: 780
    10-02-2015, 07:37 PM Go to last post
  9. Ordinal regression shows negative effect when spearman correlation shows positive

    I running a regression model where a variable is indicated to have a negative impact on the predicted variable: Estimate Std....

    Started by micdhack‎, 09-30-2015 12:26 PM
    • Replies: 8
    • Views: 2,390
    10-01-2015, 02:35 PM Go to last post
  10. The best formula to use in excel to forecast daily call volume?

    I have used single and double exponential smoothing, but did not know if there is a more accurate approach to predict how many calls that can be...

    Started by mdo8105‎, 09-24-2015 03:16 PM
    holt winters, regression analysis, time series forecast
    • Replies: 4
    • Views: 6,195
    10-01-2015, 01:46 PM Go to last post
  11. 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: 2,901
    10-01-2015, 12:07 PM Go to last post
  12. 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: 2,768
    09-30-2015, 10:10 PM Go to last post
  13. 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: 2,405
    09-30-2015, 01:38 PM Go to last post
  14. 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: 1,445
    09-30-2015, 11:00 AM Go to last post
  15. 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: 977
    09-30-2015, 02:51 AM Go to last post
  16. 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: 1,949
    09-29-2015, 11:23 AM Go to last post
  17. 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: 1,787
    09-29-2015, 07:46 AM Go to last post
  18. 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: 945
    09-28-2015, 06:29 PM Go to last post
  19. 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: 1,855
    09-27-2015, 07:18 AM Go to last post
  20. 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: 1,779
    09-26-2015, 05:45 AM Go to last post
  21. 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: 2,078
    09-24-2015, 02:16 PM Go to last post
  22. 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: 4,086
    09-24-2015, 12:55 PM Go to last post
  23. 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: 1,866
    09-22-2015, 03:51 PM Go to last post
  24. 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: 1,679
    09-22-2015, 10:54 AM Go to last post
  25. 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: 1,605
    09-22-2015, 02:43 AM Go to last post
  26. 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: 1,618
    09-21-2015, 02:35 PM Go to last post
  27. 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: 1,242
    09-20-2015, 04:52 PM Go to last post
  28. 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: 1,037
    09-20-2015, 01:44 PM Go to last post
  29. 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: 1,193
    09-20-2015, 07:08 AM Go to last post
  30. 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: 2,325
    09-18-2015, 07:35 AM Go to last post
  31. 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: 1,258
    09-18-2015, 07:13 AM Go to last post
  32. 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: 1,662
    09-17-2015, 10:25 PM Go to last post
  33. 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: 1,257
    09-13-2015, 09:57 PM Go to last post
  34. 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: 1,840
    09-12-2015, 11:23 AM Go to last post
  35. 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: 3,564
    09-10-2015, 10:52 AM Go to last post
  36. 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: 42,240
    09-10-2015, 12:27 AM Go to last post
  37. Least Squares

    Delete. Unhelpful responses.

    Started by Dave Brunner‎, 09-08-2015 08:20 PM
    • Replies: 8
    • Views: 3,273
    09-09-2015, 06:21 PM Go to last post
  38. 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: 1,865
    09-08-2015, 03:39 PM Go to last post
  39. 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: 756
    09-08-2015, 12:51 PM Go to last post
  40. 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: 1,130
    09-06-2015, 12:12 PM Go to last post
  41. 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: 1,161
    09-06-2015, 10:41 AM Go to last post
  42. 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: 2,171
    09-06-2015, 07:07 AM Go to last post
  43. 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: 1,103
    09-03-2015, 01:59 PM Go to last post
  44. 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: 1,672
    09-03-2015, 10:19 AM Go to last post
  45. 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: 1,033
    09-03-2015, 09:19 AM Go to last post
  46. 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: 1,431
    09-03-2015, 09:11 AM Go to last post
  47. 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: 3,145
    09-03-2015, 02:33 AM Go to last post
  48. 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: 2,644
    09-02-2015, 08:15 AM Go to last post
  49. 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: 2,840
    09-02-2015, 02:30 AM Go to last post
  50. 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: 1,325
    09-01-2015, 05:46 PM Go to last post
  51. 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: 1,390
    08-28-2015, 07:11 PM Go to last post
  52. 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: 1,078
    08-28-2015, 03:24 AM Go to last post
  53. 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: 1,719
    08-27-2015, 09:26 PM Go to last post
  54. 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: 1,397
    08-27-2015, 12:59 PM Go to last post
  55. 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: 686
    08-27-2015, 08:15 AM Go to last post
  56. 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: 2,780
    08-26-2015, 09:05 PM Go to last post
  57. 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: 1,203
    08-26-2015, 03:52 PM Go to last post
  58. 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: 1,621
    08-26-2015, 01:48 PM Go to last post
  59. 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: 8,347
    08-26-2015, 08:56 AM Go to last post
  60. 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: 1,505
    08-25-2015, 10:13 AM Go to last post

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