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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Binary Logistic Regression with categorical predictors and interactions.

    I'm new to logistic regression and the project I'm working on requires a model that involves two predictors: Experimental condition (categorical...

    Started by SonofDrogo‎, 04-26-2013 08:44 AM
    binary, categorical predictors, interaction, logistic regression, spss
    • Replies: 2
    • Views: 2,318
    04-26-2013, 10:38 AM Go to last post
  2. Longitudinal analyses

    I'm currently analysing data in 15 and 17 years olds. I would like to track how certain variables change between the two time points. I've found that...

    Started by loops22‎, 04-26-2013 04:10 AM
    • Replies: 0
    • Views: 2,847
    04-26-2013, 04:10 AM Go to last post
  3. mediation/moderation analysis in a within-subject design (repeated measure design)

    Hi, I hope you can help me with this issue: I have a within-subject design where some stimuli (positive negative or neutral) interference with...

    Started by ilaria‎, 04-25-2013 11:53 AM
    • Replies: 1
    • Views: 3,068
    04-25-2013, 12:29 PM Go to last post
  4. Suppression or Incidental Cancellation

    Hello, I am analyzing data using path analysis, but I think the answer will be the same as if I was using regression so I am posting here for help. ...

    Started by SLLancaster‎, 04-25-2013 10:15 AM
    • Replies: 0
    • Views: 1,585
    04-25-2013, 10:15 AM Go to last post
  5. Independent variables: 1 to 5 star rating

    Hello, I'm having a little difficulty specifying two independent variables; Customer Score and Expert Score. The reviews are each assigned 1 to...

    Started by BellaRiley‎, 04-24-2013 12:39 PM
    • Replies: 5
    • Views: 2,645
    04-25-2013, 12:11 AM Go to last post
  6. Basic Regression Question (Total Sum of Squares)

    What is the total sum of squares (regression) when Y is constant? Is it zero, thus explained fully by your model because it is a straight line? But...

    Started by FromHonoluluWithLove‎, 04-24-2013 10:46 PM
    regression, total sum of squares, y is constant
    • Replies: 0
    • Views: 1,141
    04-24-2013, 10:46 PM Go to last post
  7. Difference in ROC curve - statistical test?

    Is there a test to determine if C (the area under a ROC curve) is significantly different than another C? Or does this question even make theoretical...

    Started by noetsi‎, 04-18-2013 03:12 PM
    • Replies: 3
    • Views: 3,850
    04-24-2013, 06:10 PM Go to last post
  8. Logistic Regression Skewed Data with Lots of zeros!

    Hello, I am working on a Logistic Regression where the results that I am getting are not satisfactory. The hosmer and lemeshow test is being...

    Started by Marcio_m_r‎, 04-22-2013 12:17 PM
    • Replies: 9
    • Views: 9,555
    04-24-2013, 05:58 PM Go to last post
  9. Question Logistic regression and correlation

    Hi I'm building an account management scorecard with logistic regression. Some of the variables have quite large correlations, but they get selected...

    Started by Jolene‎, 06-10-2011 04:12 AM
    correlation, logistic, multicollinearity, scorecard
    • Replies: 5
    • Views: 10,987
    04-24-2013, 05:00 PM Go to last post
  10. Logistic regression detection of multicollinearity- is VIF applicable?

    I have a model with a dichotomous DV and IVs both continuous/numerical and dichotomous. I checked for collinearity with Pearson. How do I check...

    Started by mtsip‎, 11-22-2012 07:40 PM
    detection, logistic, multicollinearity, regression, vif
    • Replies: 1
    • Views: 9,150
    04-24-2013, 04:36 PM Go to last post
  11. Number of variables that can be included in an exact logistic regression

    I'm currently analyzing a dichotomous outcome using a small dataset of only 100 individuals. the outcome occurs in only 25 individuals and I have...

    Started by tennank‎, 01-25-2013 04:51 PM
    exact, logistic, models, regression
    • Replies: 1
    • Views: 2,772
    04-24-2013, 04:13 PM Go to last post
  12. Logistic regression - time series

    I'm doing a logistic regression on a timeseries. My dependent variable is I(t) and my independent variable is lags of I(t): I(t) = a + b*I(t-1) +...

    Started by JesperHP‎, 04-24-2013 10:38 AM
    • Replies: 0
    • Views: 2,668
    04-24-2013, 10:38 AM Go to last post
  13. Probit/Logit independent variables

    Hello, My DV is a binary variable (Yes/No) and I am using a logit/probit regression analysis. As for my independent variables,there are three...

    Started by Athinagoras‎, 04-20-2013 07:45 AM
    logit model, probit regression
    • Replies: 4
    • Views: 1,593
    04-23-2013, 11:29 PM Go to last post
  14. Chi-Square Analysis Question

    Greetings, I was wondering if somebody would like to illuminate an issue, in laymen's terms, for me. I'm not engaged in statistics at present,...

    Started by statmaster‎, 04-23-2013 05:56 PM
    • Replies: 2
    • Views: 1,679
    04-23-2013, 11:01 PM Go to last post
  15. Regression with some associated ordinal dependent variables

    I have some associated categorical dependent variables that are ordinal in nature (with 4 or 5 categories). If I want to see the effect of a set of...

    Started by Blain Waan‎, 04-23-2013 02:08 PM
    gee, multivariate regression, spss
    • Replies: 0
    • Views: 1,063
    04-23-2013, 02:08 PM Go to last post
  16. Should I include this variable or not?

    Hello, My dependent binary variable is Turnout in 2010 elections (yes/no) and I'm performing logit analysis using a cross-sectional dataset. ...

    Started by Athinagoras‎, 04-22-2013 04:39 PM
    logisitic regression, logit
    • Replies: 11
    • Views: 2,019
    04-23-2013, 02:01 PM Go to last post
  17. interaction in non-linear m. - interpretation not directly drawn from coefficients?

    Hi all, I read a paper (http://www.sciencedirect.com/science/article/pii/S0165176503000326) about interpretation of interaction terms in...

    Started by PedroR‎, 04-23-2013 06:41 AM
    • Replies: 0
    • Views: 778
    04-23-2013, 06:41 AM Go to last post
  18. Include trend in a Poisson regression

    Hey, I'm doing a research about the impact of a co-payment rise policy in the ER. My outcome variable is the number of visits in a week and my...

    Started by PedroR‎, 04-23-2013 06:31 AM
    • Replies: 0
    • Views: 1,535
    04-23-2013, 06:31 AM Go to last post
  19. Cluster-robust standard errors needed in random effects model?

    Hello, I'm currently working with a company dataset in the form of an unbalanced panel (overall sample size: 1.300 company years, T: 10, X: ~170...

    Started by Cemon‎, 04-23-2013 04:43 AM
    • Replies: 0
    • Views: 3,976
    04-23-2013, 04:43 AM Go to last post
  20. Lagged independent variable (Stata)

    Hello, I'm currently working with a company dataset in the form of an unbalanced panel (overall sample size: 1.300 company years, T: 10, X: ~170...

    Started by Cemon‎, 04-23-2013 03:55 AM
    logistic regression, stata
    • Replies: 0
    • Views: 4,499
    04-23-2013, 03:55 AM Go to last post
  21. Non-parametric causality test

    how can i rank-transform 3 variables in eviews or stata to perform non-parametric causality test? please help

    Started by ppowerful‎, 04-22-2013 03:15 PM
    • Replies: 0
    • Views: 1,545
    04-22-2013, 03:15 PM Go to last post
  22. Multiple rank f test

    Am working with 3 variables to establish causality using multiple rank f test. How do I rank transform the variables in Eviews or Stata? Please help...

    Started by ppowerful‎, 04-22-2013 02:47 PM
    • Replies: 0
    • Views: 1,224
    04-22-2013, 02:47 PM Go to last post
  23. Which subset of characters follow fairly linear relationship ?

    ALPHA and BETA are two physical quantities: A is dependent variable (Y-Axis) and B is independent variable (X-Axis). Values of ALPHA range from...

    Started by rsvp1920‎, 04-20-2013 10:42 PM
    correlation, regression, statistics
    • Replies: 1
    • Views: 1,077
    04-22-2013, 12:15 PM Go to last post
  24. Including a constant term in Logit regression

    In my logit regression all of my coefficients are significant under the 10% s.l. However, the constant term has a p-value of about 0.600. The...

    Started by Athinagoras‎, 04-21-2013 02:59 PM
    logit
    • Replies: 1
    • Views: 1,364
    04-21-2013, 07:47 PM Go to last post
  25. using Andrew Hayes PROCESS

    Can anyone give my instructions how to use syntax with PROCESS. I want to include more than one predictor in a mediational analysis and understand...

    Started by rosenmarsh‎, 04-21-2013 07:25 AM
    • Replies: 0
    • Views: 3,047
    04-21-2013, 07:25 AM Go to last post
  26. Coefficient of variation as dependent variable in linear regression - is it correct ?

    Hi, I try to predict intra-individual variation in judgment task (20 judgment). I've done a multiple linear regression with a coefficient of...

    Started by variabilty‎, 04-20-2013 04:42 AM
    • Replies: 0
    • Views: 1,504
    04-20-2013, 04:42 AM Go to last post
  27. Help - Autocorrelated and r squared crashes with GLS

    I'm trying to understand the theory behind something. I've got a time series multiple regression that gets about a .83 coefficient of determination....

    Started by ItPaysTheBills‎, 04-19-2013 09:19 PM
    • Replies: 0
    • Views: 2,459
    04-19-2013, 09:19 PM Go to last post
  28. Testing the assumption of linearity in a multi-level logistic regression analysis

    Hello all! I am working on a multi-level logistic regression (Binary Outcome) model and am trying to finding the best way to check the assumption of...

    Started by Klh449‎, 04-19-2013 09:00 PM
    • Replies: 0
    • Views: 2,410
    04-19-2013, 09:00 PM Go to last post
  29. regression, interactions and centering how does it work?

    Hello everyone! So yesterday our prof explained to us that one of the reasons of why you "center" (meaning you substract the mean) from your...

    Started by will22‎, 04-16-2013 02:25 PM
    • Replies: 11
    • Views: 3,369
    04-19-2013, 07:46 PM Go to last post
  30. Question Probit Analysis

    Greetings, My dependent variable is a binary variable (Yes/No). I chose to do a *Probit* analysis, in STATA. Thus, I started by picking some...

    Started by Athinagoras‎, 04-19-2013 07:11 PM
    binary dependent variable, probit
    • Replies: 1
    • Views: 967
    04-19-2013, 07:29 PM Go to last post
  31. Contribution of known values to a regression model

    Hello, Can anyone please tell me how I work out the contribution of known values make to a regression model using spss. For example I have a...

    Started by MJLANT‎, 04-19-2013 02:02 PM
    • Replies: 1
    • Views: 2,421
    04-19-2013, 02:42 PM Go to last post
  32. how to check for stationarity for a time series?

    Dear All I am using a time series of 18 yearly observations using Stata 11 and how to put it in the first difference if its not stationary Any...

    Started by momo‎, 04-16-2013 08:31 AM
    • Replies: 3
    • Views: 2,882
    04-19-2013, 11:01 AM Go to last post
  33. Correct interpretation of Lmer output

    I have produced the following model ...

    Started by JonoBone‎, 04-19-2013 10:05 AM
    interaction, mixed effects, random effects, regression
    • Replies: 0
    • Views: 3,968
    04-19-2013, 10:05 AM Go to last post
  34. Correct structuring of random effects?

    Hi I have produced a mixed effects model as follows; lmer(TotalPayoff~Type+Game+PgvnD*Asym+(1|Subject)+(1|Pairing),REML=FALSE,data=table1)- ...

    Started by JonoBone‎, 04-19-2013 09:27 AM
    mixed model, random effects, regression
    • Replies: 0
    • Views: 1,248
    04-19-2013, 09:27 AM Go to last post
  35. Standard Deviation of Random effect is 0?

    have a model with two random effects lmer(TotalPayoff~Type+Game+PgvnD*Asym+(1|Subject)+(1|Pairing),REML=FALSE,data=table)->m1 each pairing...

    Started by JonoBone‎, 04-18-2013 03:55 PM
    mixed effects model, random effects, regression
    • Replies: 0
    • Views: 2,389
    04-18-2013, 03:55 PM Go to last post
  36. Logistic Regression: Odds Ratio Estimate=1

    Hi, I am working with a logistic regression which I got as result the odds ratio estimate equals 1 for some predictive variables. As odds ratio=1,...

    Started by Marcio_m_r‎, 04-17-2013 07:31 AM
    • Replies: 5
    • Views: 1,586
    04-18-2013, 12:03 PM Go to last post
  37. Logit regression - before vs after intervention

    Hi. Can anyone please tell me if I can use "year" as the DV when comparing two periods (2011 before intervention; 2012 after intervention), using as...

    Started by PedroR‎, 04-17-2013 09:29 AM
    • Replies: 2
    • Views: 1,329
    04-17-2013, 10:16 AM Go to last post
  38. Quantile regression: how to determine to which quantile an individual belongs

    Dear Forum I am running a quantile regression (for the 0.1, 0.5 and 0.9 quantile) on a cross-section data set containing individuals from the...

    Started by majhes‎, 04-17-2013 04:40 AM
    quantile regression, residuals
    • Replies: 0
    • Views: 1,940
    04-17-2013, 04:40 AM Go to last post
  39. Pros & Cons of a pooled model versus a non pooled one

    Dear All, so this is what I mean, so I am looking at determinants of learning achievements of children. Cool. So now I would like to understand...

    Started by belfagor71‎, 04-12-2013 12:24 AM
    • Replies: 8
    • Views: 3,196
    04-16-2013, 11:45 AM Go to last post
  40. Stepwise multiple regression (spss gives warning that no variables were entered)

    Hello everyone, Help! Help!!!!!! I need help for stepwise multiple linear regression I'm performing with spss version 21. I have tried several...

    Started by Kasco‎, 04-16-2013 04:15 AM
    • Replies: 5
    • Views: 17,019
    04-16-2013, 05:54 AM Go to last post
  41. Interpreting a variable

    I have a project where I am supposed to interpret a number of variables. In the regression the variables are: The variable I am supposed to...

    Started by Limen‎, 04-14-2013 04:52 PM
    • Replies: 7
    • Views: 1,938
    04-15-2013, 10:08 AM Go to last post
  42. Post Find the regression line?

    Using test runs with the same automobile on a test track the following data on speed (km/hr) and mileage (km/l) were obtained. Speed (x): 48 48 64...

    Started by ani223‎, 04-10-2013 07:31 AM
    • Replies: 2
    • Views: 2,538
    04-14-2013, 10:19 PM Go to last post
  43. Interpreting logit model

    Hi everyone, "Conditional logit model" is a synonym for logistic regression? I'm trying to interpreting logit model results, but results seem...

    Started by GIS‎, 04-11-2013 01:55 AM
    • Replies: 2
    • Views: 1,769
    04-14-2013, 03:17 AM Go to last post
  44. Dealing with endogenous independent variables (Car Industry Project)

    I am running a regression on vehicle demand (vehicle registrations in 2011) with the following independent variables: Assembly location Price...

    Started by BellaRiley‎, 04-12-2013 01:27 PM
    endogenous, regression analysis, variables, vehicle
    • Replies: 0
    • Views: 1,187
    04-12-2013, 01:27 PM Go to last post
  45. Question Categorical variable as dependent variable

    I have a categorical variable which is like: "How much do you like the sun?" 1 not at all 2 not a great deal 3 neither/nor 4 quite a lot 5...

    Started by Athinagoras‎, 04-12-2013 09:00 AM
    categorical, categorical dependent, dpendent, dummy
    • Replies: 6
    • Views: 1,987
    04-12-2013, 11:28 AM Go to last post
  46. multiple regression where the output variable is non-normally distributed

    Hi I am a trainee clinical psychologist writing up my dissertation. After running tests in PASW 18 I have found out that my output variable of...

    Started by rosenmarsh‎, 04-11-2013 01:14 PM
    • Replies: 2
    • Views: 2,345
    04-12-2013, 05:11 AM Go to last post
  47. Smile Death to Stepwise

    A chapter title in a regression book I once read :p This article notes problems with the use of stepwise in the way it is commonly used....

    Started by noetsi‎, 04-11-2013 11:40 AM
    • Replies: 0
    • Views: 1,508
    04-11-2013, 11:40 AM Go to last post
  48. Include dummy variables (time series) for industries

    Hi all, I have a question about including dummy variables in mijn analysis for master thesis. In my analysis I investigate the relationship...

    Started by kleon‎, 04-11-2013 09:41 AM
    • Replies: 0
    • Views: 5,982
    04-11-2013, 09:41 AM Go to last post
  49. Stepwise regression

    Hi there, I wish someone can help. I will be grateful. I ran a stepwise linear regression in SPSS, and one of the signification predictors was...

    Started by Gary1‎, 04-06-2013 12:57 AM
    • Replies: 6
    • Views: 1,692
    04-11-2013, 02:50 AM Go to last post
  50. Logistic model interpretation - insignificant main effect, significant interaction

    Hi! I am running a logistic regression model where I investigate what characteristics matter when a group of people chooses representatives for...

    Started by plopp‎, 04-10-2013 08:23 AM
    • Replies: 5
    • Views: 5,326
    04-10-2013, 05:19 PM Go to last post
  51. Logistic regression

    As far as I know logistic regression does not have beta weights, that is slopes which show which variable has the relatively greatest impact on the...

    Started by noetsi‎, 01-23-2013 01:14 PM
    4 Pages
    1 2 3 ... 4
    • Replies: 55
    • Views: 9,432
    04-10-2013, 10:12 AM Go to last post
  52. Stepwise logistic regression with categorical variables

    The way logistic regression works with categorical variables, is that every categorical variable with k levels gets expanded into k-1 binary...

    Started by mlut‎, 04-09-2013 05:00 PM
    • Replies: 2
    • Views: 1,900
    04-09-2013, 07:21 PM Go to last post
  53. Logistics Regression and Mediation

    Hey, I'm soon to be using data from a large cohort. Ideally I want to look at whether depressive symptoms in childhood effects attentional...

    Started by loops22‎, 04-09-2013 11:16 AM
    • Replies: 5
    • Views: 2,855
    04-09-2013, 04:18 PM Go to last post
  54. Multiple Regression Model to Predict House Price

    Hi there, I have a statistics assignment and the first question is causing me some trouble. The question is to predict the price of a 2...

    Started by purplekay‎, 04-09-2013 10:58 AM
    • Replies: 0
    • Views: 3,829
    04-09-2013, 10:58 AM Go to last post
  55. Trouble understanding what these coefficients mean

    Hi everyone, First, a quick disclaimer: I have only minimal background in statistics, and much less in regression analysis, so please excuse what...

    Started by lpleva‎, 04-08-2013 01:05 PM
    • Replies: 1
    • Views: 1,427
    04-08-2013, 05:07 PM Go to last post
  56. [Optimization Solver] Good model fit, but wrong standard deviation coefficients

    Dear reader, I am facing an optimization problem and, at this point, I need help from someone with more knowledge than me. My goal: For a...

    Started by cgmac‎, 04-08-2013 04:54 PM
    excel, non-linear regression, optimization, solver, solvstat
    • Replies: 1
    • Views: 22,789
    04-08-2013, 04:59 PM Go to last post
  57. Hierarchical Regression for Undergraduate Thesis

    Hi, I am working on an undergraduate thesis testing the effectiveness of incentives in the workplace. My director told me that I had to run a...

    Started by Catalyst48‎, 04-01-2013 07:18 PM
    • Replies: 6
    • Views: 3,386
    04-08-2013, 04:53 PM Go to last post
  58. Exclamation Hierarchical Regression Help ASAP!

    Hi I have conducted a hierarchical regression analyses, with one IV in block 1 and 6 IV's in block 2. The variable in model 1 (which was...

    Started by sarza19‎, 04-08-2013 09:14 AM
    • Replies: 1
    • Views: 866
    04-08-2013, 04:51 PM Go to last post
  59. Exclamation How do I begin????

    I just need to know how to begin this excel process; Develop an estimated regression equation that can be used to predict the fuel efficiency for...

    Started by rufus12‎, 04-07-2013 10:12 PM
    • Replies: 1
    • Views: 3,697
    04-08-2013, 04:48 PM Go to last post
  60. Multiple regression with a summed, 13-item scale as the DV?

    Hello, As part of my dissertation research I created a scale to measure perceived quality of care. This instrument is comprised of 13 binary items...

    Started by Phil Higgins‎, 04-07-2013 01:43 PM
    multiple regression, scales
    • Replies: 2
    • Views: 1,798
    04-08-2013, 04:46 PM Go to last post

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