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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. 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: 814
    09-20-2015, 01:44 PM Go to last post
  2. 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: 917
    09-20-2015, 07:08 AM Go to last post
  3. 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: 2,008
    09-18-2015, 07:35 AM Go to last post
  4. 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: 1,077
    09-18-2015, 07:13 AM Go to last post
  5. 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: 1,473
    09-17-2015, 10:25 PM Go to last post
  6. 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: 1,113
    09-13-2015, 09:57 PM Go to last post
  7. 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: 1,519
    09-12-2015, 11:23 AM Go to last post
  8. 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: 2,882
    09-10-2015, 10:52 AM Go to last post
  9. 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: 37,966
    09-10-2015, 12:27 AM Go to last post
  10. Least Squares

    Delete. Unhelpful responses.

    Started by Dave Brunner‎, 09-08-2015 08:20 PM
    • Replies: 8
    • Views: 2,818
    09-09-2015, 06:21 PM Go to last post
  11. 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: 1,605
    09-08-2015, 03:39 PM Go to last post
  12. 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: 630
    09-08-2015, 12:51 PM Go to last post
  13. 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: 971
    09-06-2015, 12:12 PM Go to last post
  14. 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: 959
    09-06-2015, 10:41 AM Go to last post
  15. 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: 1,825
    09-06-2015, 07:07 AM Go to last post
  16. 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: 940
    09-03-2015, 01:59 PM Go to last post
  17. 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: 1,339
    09-03-2015, 10:19 AM Go to last post
  18. 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: 899
    09-03-2015, 09:19 AM Go to last post
  19. 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: 1,204
    09-03-2015, 09:11 AM Go to last post
  20. 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: 2,751
    09-03-2015, 02:33 AM Go to last post
  21. 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: 2,341
    09-02-2015, 08:15 AM Go to last post
  22. 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: 2,421
    09-02-2015, 02:30 AM Go to last post
  23. 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: 1,112
    09-01-2015, 05:46 PM Go to last post
  24. 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: 1,173
    08-28-2015, 07:11 PM Go to last post
  25. 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: 924
    08-28-2015, 03:24 AM Go to last post
  26. 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: 1,312
    08-27-2015, 09:26 PM Go to last post
  27. 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: 1,222
    08-27-2015, 12:59 PM Go to last post
  28. 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: 612
    08-27-2015, 08:15 AM Go to last post
  29. 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: 2,073
    08-26-2015, 09:05 PM Go to last post
  30. 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: 1,041
    08-26-2015, 03:52 PM Go to last post
  31. 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: 1,342
    08-26-2015, 01:48 PM Go to last post
  32. 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: 7,285
    08-26-2015, 08:56 AM Go to last post
  33. 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: 1,261
    08-25-2015, 10:13 AM Go to last post
  34. 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: 921
    08-23-2015, 04:05 PM Go to last post
  35. 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: 909
    08-22-2015, 11:52 PM Go to last post
  36. 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: 1,086
    08-22-2015, 08:08 AM Go to last post
  37. 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: 743
    08-21-2015, 03:45 PM Go to last post
  38. 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: 1,126
    08-21-2015, 02:09 PM Go to last post
  39. 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: 1,046
    08-21-2015, 04:11 AM Go to last post
  40. 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: 862
    08-19-2015, 10:13 AM Go to last post
  41. 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: 1,919
    08-16-2015, 01:37 PM Go to last post
  42. 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: 1,259
    08-16-2015, 11:16 AM Go to last post
  43. 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: 543
    08-16-2015, 09:42 AM Go to last post
  44. Difference-in-difference regression

    Hello, I have a problem with my current research project and I am not very experienced with statistics so it would be great to find some help...

    Started by ERa‎, 08-16-2015 01:46 AM
    difference in difference, difference-in-difference, ols, ols regression, regression
    • Replies: 0
    • Views: 1,034
    08-16-2015, 01:46 AM Go to last post
  45. Best way to code a variable in a hierarchical (multi-level) regression?

    The outcome is binary, and I have individual-level data and geographical-level data. It's the latter I need help with. Here's the best example:...

    Started by oncearunner‎, 08-13-2015 08:38 PM
    • Replies: 1
    • Views: 1,094
    08-13-2015, 09:54 PM Go to last post
  46. Logistic Regression: collinearity btw continuous and categorical predictors?

    Hi All, I am still working on fitting a binary Logistic Regression model in which the DV is land 'optimal vs. non-optimal quality', and the IVs are...

    Started by gianmarco‎, 08-12-2015 05:22 AM
    • Replies: 7
    • Views: 1,669
    08-12-2015, 07:21 AM Go to last post
  47. Which model would you choose?

    Dear readers, I am struggeling with the model selection (ICs are very different and many insignificant models). Which model would you choose, and...

    Started by martijn9000‎, 08-12-2015 06:17 AM
    aic bic, model selection
    • Replies: 1
    • Views: 973
    08-12-2015, 06:35 AM Go to last post
  48. How to handle missing values in lm.fit?

    Is there a way to use lm.fit without completely removing rows with missing data using R? Is there a way for lm.fit to leave out one piece of...

    Started by RM1004‎, 08-10-2015 10:36 AM
    missing data, regression model
    • Replies: 1
    • Views: 1,394
    08-10-2015, 03:33 PM Go to last post
  49. Help with regression model

    Hi, I am trying to understand whether there are any problems with a regression model I'm using for research. I'm interested in the effect of...

    Started by oracle133‎, 08-10-2015 10:11 AM
    • Replies: 0
    • Views: 764
    08-10-2015, 10:11 AM Go to last post
  50. Polynomial Regression

    Is there anyway to get this formula in the polar opposite where X = Expression? I am hoping to get this so that I can use it to help do a...

    Started by mrmmickle1‎, 08-06-2015 10:42 PM
    • Replies: 0
    • Views: 1,314
    08-06-2015, 10:42 PM Go to last post
  51. Best Way to Format an Excel Data Sheet for export to R.

    Hi. I am conducting a multiple linear regression using Panel data for my finance honours research project. I have collected data for 100 stocks...

    Started by DCKALE002‎, 08-06-2015 08:10 AM
    • Replies: 0
    • Views: 928
    08-06-2015, 08:10 AM Go to last post
  52. Comparing linear regression models: a chi-squared test to compare adjusted R-squares?

    Hi all, I used linear regression to analyze the data of one of my experiments, and used 3 predictors in a first model, added 4 more predictors in...

    Started by Maayke‎, 08-05-2015 06:43 AM
    • Replies: 1
    • Views: 1,184
    08-06-2015, 03:04 AM Go to last post
  53. Experiment Design Help please

    Hi All I have used a Central Composite Design (CCD) for my experiments, where I have three Factors (A, B, c) and each Factor has five values. I have...

    Started by Dlair‎, 06-21-2015 08:16 AM
    • Replies: 2
    • Views: 1,433
    08-04-2015, 05:15 PM Go to last post
  54. p-value of a coefficient from a regression

    The t-stat value follows a two-tail symmetric t-distribution with mean and median of zero? Am I correct so far? If so, then how can you get a...

    Started by oahz‎, 08-04-2015 10:03 AM
    • Replies: 9
    • Views: 1,858
    08-04-2015, 04:54 PM Go to last post
  55. Probit Regression

    Hİ all. Hope everyone is great. I just want to ask a question. What are the assumptions of probit regression? Can you offer me a book about probit...

    Started by chivasrom‎, 08-04-2015 02:33 AM
    • Replies: 1
    • Views: 1,063
    08-04-2015, 03:39 AM Go to last post
  56. Impact of heteroscedasticity and non-normality on utility of regression result?

    Hello: I am using least squares 2nd order polynomial regression to determine the effect of a single independent variable (X) on a dependent...

    Started by Joost‎, 08-01-2015 07:45 PM
    • Replies: 0
    • Views: 938
    08-01-2015, 07:45 PM Go to last post
  57. What if you are not interested in a variable that has been found to matter in the lit

    The article I am working for stresses the importance of a variable that my organization has no interest in at all. It is an important control, should...

    Started by noetsi‎, 07-31-2015 01:03 PM
    • Replies: 4
    • Views: 1,367
    08-01-2015, 03:28 AM Go to last post
  58. SPSS Logistic Regression Predicts Too Many Negatives?

    Hello everybody, I have a logistic regression model, where the outcome Yes is coded as 1, No as 0. The split between Yes and No is about 30/70...

    Started by pd1598‎, 07-31-2015 10:41 AM
    • Replies: 6
    • Views: 1,318
    08-01-2015, 02:28 AM Go to last post
  59. New to hierarchical regression, looking for advice

    Hey all, I am relatively experienced in plain old OLS and I'm trying to learn how to do mixed-effects, hierarchical modeling. I got Andrew...

    Started by sasin‎, 07-31-2015 06:57 PM
    • Replies: 0
    • Views: 793
    07-31-2015, 06:57 PM Go to last post
  60. What is "mixed-effects OLS regression"

    It is mentioned on p 14 of the link below. I have never heard of it before... ...

    Started by noetsi‎, 07-31-2015 12:58 PM
    • Replies: 3
    • Views: 1,232
    07-31-2015, 06:21 PM Go to last post

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