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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Problem with interpretation of regression coefficients

    Hi, I have problem with interpretation of regression coefficients. My regression function is: y = a + b1*x + b2*x^2 How can I interpret b1...

    Started by russel2000‎, 04-25-2015 08:04 AM
    • Replies: 5
    • Views: 1,700
    04-25-2015, 04:01 PM Go to last post
  2. Logistic Regression: Classification table vs. Chi-square?

    Hello, I'm using binary logistic regression for my bachelor thesis (psychology). My problem is that the classification table does not change...

    Started by kazu‎, 03-27-2013 05:51 AM
    • Replies: 5
    • Views: 5,392
    04-30-2015, 04:31 AM Go to last post
  3. Logistic regression. How to combine classes in a mullticategorical variable?

    Hi, I’m preparing some data with a view to carry out a multivariable logistic regression. The dependent variable is LANDSLIDES, i.e....

    Started by mattdoughty‎, 02-21-2014 08:58 AM
    • Replies: 5
    • Views: 3,795
    02-21-2014, 11:45 AM Go to last post
  4. Regression Assumptions for different time series models

    I am reading a non-statistics book at the moment, which writes about statistics. Not a good constellation, I know. Unfortunately I do not have a...

    Started by consuli1‎, 01-08-2014 01:53 PM
    • Replies: 5
    • Views: 1,970
    01-13-2014, 09:41 AM Go to last post
  5. How to put weights on indenpendent variables in a regression analysis?

    Hello, I want to do a regression of a continuous dependent variable (y) (say grams of crystals formed) using several independent variables (also...

    Started by sakuraono‎, 12-04-2013 07:12 AM
    regression, weighted parameters
    • Replies: 5
    • Views: 1,674
    12-10-2013, 01:03 PM Go to last post
  6. Benefits of converting dependent variable to log form?

    For regression analysis, what is the benefit of converting the dependent variable to log form. I'm using hourly wages as the dependent variable. ...

    Started by dataset‎, 01-16-2014 06:00 AM
    • Replies: 5
    • Views: 2,358
    01-16-2014, 11:11 AM Go to last post
  7. ANOVA and Multiple Regression DIFFERENT Result

    Using a data set I come up with this problem. The effects of A, B, and their interaction (A × B) on Y are tested. The data are analyzed using both...

    Started by fayyazcivil‎, 01-21-2014 12:16 PM
    • Replies: 5
    • Views: 1,932
    01-21-2014, 01:19 PM Go to last post
  8. Getting there with logistic regression - some (hopefully!) simple questions.

    Hi all, Following my post the other day I am now at the writing up stage of my hierarchical logistic regression. I inputted 5 variables across 3...

    Started by tamsynann‎, 02-14-2014 08:27 AM
    • Replies: 5
    • Views: 1,170
    02-17-2014, 09:59 AM Go to last post
  9. WHICH Test Analysis Can I use ?

    I am kindly requesting your kind advise. I am doing an analysis for collected data of experimental design using control group, but my participants in...

    Started by AdelA‎, 02-22-2014 03:24 PM
    • Replies: 5
    • Views: 2,419
    03-04-2014, 01:52 PM Go to last post
  10. Linear Regression Help

    I am currently running analysis of my data in SPSS, and I am at kind of loss of how to run the

    Started by Red72‎, 03-26-2014 10:19 AM
    • Replies: 5
    • Views: 2,077
    03-27-2014, 05:47 AM Go to last post
  11. Converting nominal dependent to interval variables through use of dummy variables

    Dear all, My research involves the independent interval variable of Socio-Economic Status (SES), the ordinal independent variable of self-efficacy...

    Started by GDP9‎, 03-26-2014 01:18 PM
    • Replies: 5
    • Views: 1,574
    03-27-2014, 11:41 AM Go to last post
  12. Interactions cancel my main effects

    I was looking at the effects of : poverty, political interest, satisfaction with democracy and political trust on political participation through...

    Started by Annvdb‎, 04-15-2014 12:49 AM
    • Replies: 5
    • Views: 1,442
    04-15-2014, 03:13 AM Go to last post
  13. negative t-statistics

    hi every one, i have run OLS regression for one dependent and two independent variables. the coefficients of both independent variables are positive,...

    Started by ssm‎, 04-22-2014 05:57 AM
    • Replies: 5
    • Views: 2,959
    04-22-2014, 01:37 PM Go to last post
  14. Logistic regression or ANOVA?

    I’m working with a large data set looking at the associations between diabetes and depression with various cognitive outcomes. Specifically, my...

    Started by loops22‎, 04-23-2014 09:59 AM
    • Replies: 5
    • Views: 1,049
    04-25-2014, 07:51 AM Go to last post
  15. Logistic model - numerical vs. categorical covariates & target

    I am using a powerful analytics tool built by Oracle (Data Miner). I am trying to determine the probability of death for a patient given the presence...

    Started by syswizard‎, 05-01-2014 02:44 PM
    logistic covariates
    • Replies: 5
    • Views: 1,900
    05-01-2014, 11:30 PM Go to last post
  16. Time fixed effects and significance of different models

    Hello, I am currently writing my master thesis in economics. However, I might not be as educated in Statistics as you might be, so I hope you...

    Started by Johnson2‎, 06-01-2014 05:53 PM
    • Replies: 5
    • Views: 2,082
    06-03-2014, 12:48 AM Go to last post
  17. multi level approach

    hi, i have this project to do, but i don't know where to start....Anyone willing to help me ?

    Started by icem3l‎, 06-19-2014 01:09 PM
    • Replies: 5
    • Views: 2,172
    06-19-2014, 03:57 PM Go to last post
  18. OLS assumptions

    Dear all, I would like to ask a question concerning two OLS assumptions - a) dependence of observations b) correlation between residuals and...

    Started by purifyz‎, 06-13-2014 08:15 PM
    • Replies: 5
    • Views: 2,528
    06-22-2014, 05:31 PM Go to last post
  19. Multi Variable Regression

    Hi, I am trying to do multivariable regression analysis on the following data set. Y={ 707208490, 624915399 , 523124515, 386441119} ...

    Started by vaibhavs1985‎, 06-17-2014 10:13 PM
    • Replies: 5
    • Views: 1,845
    06-17-2014, 11:17 PM Go to last post
  20. [Stata - Regression with categorical variables correlated] Multicollinearity

    Hello! I'm currently working on my thesis and I have a problem. I'm doing a regression where many variables are categorical ones (profession,...

    Started by cquetstr‎, 06-20-2014 06:16 AM
    categorical variables, regression, stata 11
    • Replies: 5
    • Views: 3,205
    06-21-2014, 08:25 AM Go to last post
  21. age groups vs continous

    hello everyone, I am curious to know if there are any best practices when dealing with age variables for a logistic regression model. I currently...

    Started by swoonef‎, 07-14-2014 02:06 PM
    • Replies: 5
    • Views: 2,371
    07-15-2014, 07:06 AM Go to last post
  22. Logistic regression, but no negative responses?

    So I am trying to model who is likely, from a list of addresses, to go to a store. I have lots of criteria about the people who have visited my...

    Started by bernstml19‎, 08-11-2014 06:42 PM
    binary data, logistic regression, regression analysis
    • Replies: 5
    • Views: 1,337
    08-12-2014, 10:38 AM Go to last post
  23. Multilevel: Include only two dummies of a 7-1 dummy set into random slope?

    I am calculating a two-level linear multilevel analysis. A look at the random intercept random slope model showed me a significant decrease in my...

    Started by David_D‎, 10-15-2014 11:44 AM
    • Replies: 5
    • Views: 2,496
    10-16-2014, 01:50 PM Go to last post
  24. Summarizing time series data

    Hello, Thank you very much for taking the time to read this! I have many (~70) time series showing the average body size (kg) for the ~50...

    Started by kmj‎, 10-20-2014 10:53 PM
    series, temporal, time, time series
    • Replies: 5
    • Views: 2,898
    10-21-2014, 04:18 PM Go to last post
  25. Smile Running multple, multiple regressions? which statistical test should i use?

    I have done a study on whether personality and demographics predict interaction on facebook brand pages. I have used a Big five personality scale...

    Started by arnika‎, 11-21-2014 09:22 AM
    correlation, regression, spss
    • Replies: 5
    • Views: 2,316
    11-22-2014, 08:18 AM Go to last post
  26. Interpreting multiple regression beta values

    Basic question here but just want to double check my understanding.. When I do a multiple regression I get beta values b1=0.01 and b2=0.7 This...

    Started by jfw13‎, 11-27-2014 11:43 AM
    beta values, regression
    • Replies: 5
    • Views: 1,506
    11-27-2014, 03:33 PM Go to last post
  27. Significance of constant - Mean adjusted values vs. Z scores

    Hello everyone, I am trying to run a regression analysis on 2 Inputs and their relationship with 1 Outcome variable across a number of products. I...

    Started by Londoner‎, 11-30-2014 08:39 PM
    • Replies: 5
    • Views: 1,733
    12-02-2014, 10:23 PM Go to last post
  28. Thumbs up Using regression to compensate for matching?

    Suppose I am using four groups for a study: South Asian patients, n=41 First Nation patients, n=48 Arabic patients, n=26 South Asian controls,...

    Started by muaaman‎, 12-25-2014 10:05 AM
    compensation, controls, matching, patients, regression
    • Replies: 5
    • Views: 1,583
    12-26-2014, 04:51 AM Go to last post
  29. Multiple linear regression vs logistic regression

    I am not a statistician myself, and haven't done regressions for very long time and have a basic question. I need to do multiple regression for...

    Started by EricaW‎, 12-28-2014 03:30 PM
    • Replies: 5
    • Views: 2,453
    12-29-2014, 08:18 PM Go to last post
  30. Do I need to control for Type 1 errors?

    Hi guys, the situation I have is, a reviewer has asked me to reduce my mediation model (MPLUS) as he says I have too many tests going on. In fairness...

    Started by DrFurbs‎, 01-10-2015 02:31 PM
    • Replies: 5
    • Views: 2,265
    01-14-2015, 03:09 PM Go to last post
  31. Regression / modelling help

    Hi All, I'm new here so If I've posted this in the wrong place or its not practical then I apologise. I'm new to regression so helpfully Im...

    Started by bobastic‎, 01-14-2015 05:44 PM
    • Replies: 5
    • Views: 2,421
    02-15-2015, 08:45 PM Go to last post
  32. mixed effect models in R using glmer

    Folks, I'm looking for a very basic introduction to mixed effect models in a health care context. Suggestions welcome. Thanks

    Started by tdetz‎, 01-20-2015 09:34 PM
    • Replies: 5
    • Views: 1,576
    01-21-2015, 07:42 PM Go to last post
  33. Linear Regression (Age Interval, 10 years)

    Hi guys, I initially ran a linear regression, however we found that age (by year) generated a negligible B coefficient. In response we...

    Started by jle‎, 02-09-2015 09:29 PM
    • Replies: 5
    • Views: 1,466
    02-10-2015, 08:54 AM Go to last post
  34. B Coefficient

    I'm having some difficulty making sense of a logistic regression. I think I have the interpretation right based on a university tutorial on how to...

    Started by jle‎, 02-12-2015 12:40 AM
    • Replies: 5
    • Views: 1,855
    02-13-2015, 08:41 AM Go to last post
  35. Statistics Regression Question

    I need help with this question! The graph is in the picture below! A popular, nationwide standardized test taken by high-school juniors and...

    Started by zolton5971‎, 03-05-2015 09:56 AM
    • Replies: 5
    • Views: 2,473
    03-07-2015, 02:40 PM Go to last post
  36. DEA Analysis

    Hi, I'm currently looking for some materials on DEA Analysis. Do you guys have any e-books or good webpages on this topic? I seek a material...

    Started by JennyX28X‎, 04-09-2015 09:42 AM
    • Replies: 5
    • Views: 1,979
    04-16-2015, 06:57 AM Go to last post
  37. Help calculating standard error of intercept

    Hi all, I'm running an equally weighted moving average multiple regression with 10 explanatory variables, and I'm looking at the change in alpha...

    Started by Karl Gustaf Karsten‎, 04-18-2015 08:58 AM
    • Replies: 5
    • Views: 5,737
    04-19-2015, 05:06 PM Go to last post
  38. predictor 2 on the causal pathway between predictor 1 and outcome

    Hi: This is re-post of a something I put in the 'statistics' forum a while ago. There were 75 views but no responses, so I thought I try again in...

    Started by sigmundo‎, 07-08-2015 07:17 AM
    causal pathways
    • Replies: 5
    • Views: 1,451
    07-09-2015, 10:02 AM Go to last post
  39. Preference Share + Regression

    I have conducted a conjoint survey evaluating several combinations of user and devices, with the end goal of calculating a preference share of each...

    Started by Julia18‎, 07-15-2015 02:35 PM
    • Replies: 5
    • Views: 1,678
    07-15-2015, 03:37 PM Go to last post
  40. Multiple mediation analysis

    I have a question about multiple mediation analysis. I had originally designed a study to see if four separate variables (M1, M2, M3 and M4) mediate...

    Started by B B Jinx‎, 07-20-2015 12:25 PM
    • Replies: 5
    • Views: 1,457
    07-27-2015, 08:32 AM Go to last post
  41. 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: 2,893
    10-01-2015, 12:07 PM Go to last post
  42. Does the intercept p value matter?

    Hi everyone, I work on a model with logistic regression as a result I have intercept value = 0.06 , with a p-value = 0.86. Does this model...

    Started by valko‎, 10-16-2015 06:56 AM
    • Replies: 5
    • Views: 2,053
    10-17-2015, 04:20 AM Go to last post
  43. R Squared and dummy variables

    Hey, If you changed your model from one variable to a number of dummy variables, would the R^2 increase considerably, supposing that the dummy...

    Started by mhider‎, 11-01-2015 02:36 PM
    • Replies: 5
    • Views: 3,239
    11-03-2015, 02:11 PM Go to last post
  44. regression on age groups

    Dear All, I have the following question: Estimate a simple regression model of ‘libertarian-authoritarian’ attitude as a function of age groups...

    Started by sugabird22‎, 11-17-2015 08:55 AM
    age, group, regression
    • Replies: 5
    • Views: 4,325
    11-17-2015, 06:37 PM Go to last post
  45. ANCOVA - can I delete a very significant variable from a model's equation?

    Hi all, I undertook a sensitivity analysis to study the contribution of explanatory variables to soil organic carbon variations. Here, the...

    Started by CGG‎, 11-22-2015 05:38 PM
    ancova, variable in model
    • Replies: 5
    • Views: 1,202
    11-24-2015, 07:30 AM Go to last post
  46. Calculate estimated median survival time (by hand)

    So I have some SAS code: proc lifereg data=surv_data; model event_time * censor(1) = var1 var2 var3 / distribution=weibull; output...

    Started by lancearmstrong1313‎, 12-10-2015 01:06 PM
    • Replies: 5
    • Views: 2,048
    12-11-2015, 01:05 PM Go to last post
  47. Alternatives to ANCOVA? Unequal slopes.

    Hello, and thank you for your help on my question. My goal is to compare multiple groups to determine if a certain "variable of interest" is...

    Started by mgranatosky‎, 01-19-2016 11:04 PM
    • Replies: 5
    • Views: 1,742
    01-20-2016, 03:55 PM Go to last post
  48. [R]: ROC curve after fitting a logistic model to a new datset

    Hello, I have fitted a Logistic Regression model (with 1 binary DV, and several IVs), and then I fitted it to a new dataset using the function...

    Started by gianmarco‎, 01-22-2016 08:24 AM
    • Replies: 5
    • Views: 1,416
    01-23-2016, 06:45 AM Go to last post
  49. Regression following MANOVA results

    Hi Stats Gurus, This question is about a regression analysis that I want to run, but I am not too familiar with this type of analysis. I have...

    Started by jarbski2‎, 01-27-2016 11:54 AM
    manova, regression analysis
    • Replies: 5
    • Views: 1,641
    01-27-2016, 01:18 PM Go to last post
  50. Different signs

    Hello everybody: I have a litte problem interpreting my regression output. In the first regression, I have a continuous variable with a...

    Started by Student90‎, 01-23-2016 08:44 AM
    • Replies: 5
    • Views: 1,753
    01-24-2016, 05:09 AM Go to last post
  51. Confidence bands for a linear regression with X and Y errors

    Dear all, I have been searching for a while without finding a solution, so I hope someone here can help. Here is my problem: I have (X, Y)...

    Started by quentin.flm‎, 02-05-2016 09:23 AM
    • Replies: 5
    • Views: 1,535
    02-08-2016, 05:29 AM Go to last post
  52. Effects of general participation and intensity of participation

    Exploring data from a quasi-experimental study, we want to investigate effects of general participation in a program (dichotomous; part_dich) aswell...

    Started by l.frei‎, 02-08-2016 05:30 AM
    general participation, participation intensity, quasi-experimental study
    • Replies: 5
    • Views: 1,909
    02-10-2016, 08:48 AM Go to last post
  53. Association between categorical and numerical variables using R

    Hi, I am new to this forum so please be kind :-). Not sure if this belongs in 'R'. I will describe my problem as good as I can. First of all I am...

    Started by MasterStudent‎, 02-25-2016 07:43 AM
    chi square, general linear model, r commander
    • Replies: 5
    • Views: 3,064
    02-25-2016, 12:06 PM Go to last post
  54. Do I have a non-linear regression?

    Hello everyone, I want to start by saying that I don't have too much experience working with continuous dependent variables. I have worked more...

    Started by Marvin85‎, 02-26-2016 03:22 PM
    non-linear regression, predict, predicted y terms
    • Replies: 5
    • Views: 1,760
    05-04-2016, 02:19 AM Go to last post
  55. 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: 1,898
    03-21-2016, 04:35 PM Go to last post
  56. 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: 1,339
    03-28-2016, 06:16 PM Go to last post
  57. 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: 1,831
    04-18-2016, 05:32 PM Go to last post
  58. 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: 1,313
    04-25-2016, 09:33 PM Go to last post
  59. Why do you subtract the mean of a predictor variable from that variable..

    An author using temperature as a predictor subtracted its mean value from each temperature data point to deal with "scaling issues." I don't...

    Started by noetsi‎, 05-28-2016 01:10 PM
    • Replies: 5
    • Views: 1,501
    05-29-2016, 11:33 AM Go to last post
  60. Logistic Regression with interactions and contrasts

    Hello All, I need some advice for choosing the correct model. I have 3 binary variables: Risk (0 = the person doesn't take financial risks, 1 =...

    Started by Yankel‎, 06-07-2016 05:55 AM
    • Replies: 5
    • Views: 1,953
    06-08-2016, 09:37 AM Go to last post

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