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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. How exactly does MLR hold other things constant?

    Hi all, I have just signed up to the forum and I am quite inspired by the discussions. I have an intermediate level experience in statistics...

    Started by ChiSquare‎, 09-17-2013 02:32 AM
    • Replies: 2
    • Views: 2,982
    09-17-2013, 09:46 AM Go to last post
  2. SVAR parameter standard errors

    Hi everyone, How to calculate the standard errors of SVAR parameters. I know how to estimate it for contemporaneous parameter. I want to know how...

    Started by cjiang3‎, 11-17-2014 12:55 PM
    svar, var
    • Replies: 2
    • Views: 2,978
    11-18-2014, 09:27 AM Go to last post
  3. Interaction term

    Hi, I'm running linear regressions (1) Y = a + b and (2) Y = a + b + axb The coefficients for a and b in (1) have positive signs which are...

    Started by dou‎, 05-22-2011 10:23 AM
    • Replies: 3
    • Views: 2,976
    05-23-2011, 04:49 AM Go to last post
  4. Stupid Q: Interpretation of slope in OLS

    Hi ppl I'm running a bunch of regressions on a series of stock returns (decimal values). One of the models is: r_t = a0 + b1*rm_t + e ...

    Started by Jonni‎, 10-05-2011 12:13 PM
    ols
    • Replies: 4
    • Views: 2,975
    10-07-2011, 12:02 PM Go to last post
  5. Logistic Regression predicted probability is either 1 or 0 (or literally 2.2204E-16)

    I am doing a test logistic regression to predict whether employees will stay in the company for more than 3 years. After the model is trained, the...

    Started by Rizer‎, 01-01-2016 01:35 AM
    logistic regression
    • Replies: 11
    • Views: 2,975
    01-03-2016, 01:28 PM Go to last post
  6. Multinomial hierarchical logistic regression

    Hi everyone! I am wondering if anyone could help me to understand multinomial logistic regression. I am trying to do similar hierarchical...

    Started by katimhone‎, 09-05-2011 05:39 AM
    • Replies: 1
    • Views: 2,974
    09-05-2011, 05:42 AM Go to last post
  7. Exclamation Regression & Predictions

    I have a problem to work out involving forecasting/predicting: Given multiple data sets (variables), I need to evaluate which set is the best...

    Started by corrinebean‎, 11-25-2007 07:15 PM
    • Replies: 1
    • Views: 2,972
    11-26-2007, 04:10 AM Go to last post
  8. Principal component analysis before regression anallysis

    Hi this is my first post and i've searched for this answer in vain. I have 50 participants in an experiment i conducted and i want to use a...

    Started by jeandaniel‎, 03-30-2012 06:33 PM
    • Replies: 3
    • Views: 2,972
    03-31-2012, 10:22 AM Go to last post
  9. Generalised Least Squares VS Multilevel Modeling...

    hello guys! i've been trying to wrap my head around this question for a while... if i understand things correctly, generalised least squares (GLS) is...

    Started by will22‎, 05-17-2011 04:35 AM
    • Replies: 3
    • Views: 2,971
    05-18-2011, 09:18 PM Go to last post
  10. Split sample regression vs Regression with interaction term

    Hi, I need some advice on using split sample regression versus regression with interaction term. My objective is to tell the difference, if any,...

    Started by wand‎, 12-12-2014 12:08 PM
    • Replies: 0
    • Views: 2,969
    12-12-2014, 12:08 PM Go to last post
  11. Review Methodology

    Hello, I'm about to embark on some mutivariate regression analysis for my company but it's been a while since I've used these methods. The outputs...

    Started by osknows‎, 08-18-2010 04:10 PM
    • Replies: 3
    • Views: 2,968
    08-18-2010, 04:39 PM Go to last post
  12. SPSS multiple regression????

    I want to do a multiple regression , correlating offspring produced on mating one with offspring produced on mating two also with male age at the...

    Started by marigold‎, 04-01-2009 07:24 AM
    • Replies: 0
    • Views: 2,967
    04-01-2009, 07:24 AM Go to last post
  13. Reference for max vars in a model

    I used 7 predictor variables in a regression model with a sample size of 103. Someone who reviewed my manuscript said that was too many predictors. ...

    Started by LBerg‎, 01-10-2011 08:22 PM
    # of predictor variables, sample size
    • Replies: 2
    • Views: 2,967
    01-11-2011, 02:07 AM Go to last post
  14. how to draw a logistic curve in word, excel etc

    Hello, I am working on a binary logistic regression and would like to insert the logistic sigmoid curve. do you know how to draw such a curve in...

    Started by t.wang21@yahoo.com.au‎, 02-14-2015 08:32 PM
    • Replies: 0
    • Views: 2,967
    02-14-2015, 08:32 PM Go to last post
  15. Link function

    Hi all, I've never really understood the concept of "link functions". Is anyone able to point me in the right direction of something that could...

    Started by duskstar‎, 04-12-2011 03:18 AM
    • Replies: 1
    • Views: 2,964
    04-12-2011, 05:51 AM Go to last post
  16. Interpreting mean centered polynomial regression

    Hi, I'm running a simple OLS regression and want to examine non-linear effects. Therefore I have included a square term of the independent...

    Started by economix‎, 02-21-2012 02:56 PM
    • Replies: 0
    • Views: 2,964
    02-21-2012, 02:56 PM Go to last post
  17. What test can I use to find out which bivariate regression is *significantly* better?

    I have three variables: y, x1 and x2 (n=130). I want to know whether one of the x variables is a significantly better bivariate predictor than the...

    Started by verarium‎, 02-15-2011 05:32 PM
    • Replies: 3
    • Views: 2,960
    02-16-2011, 01:49 PM Go to last post
  18. Combining linear regressions

    I have two variables, x and y, and I am using linear regression to predict y from x over a large set of subjects. There are multiple observations per...

    Started by aix‎, 06-01-2010 02:48 PM
    • Replies: 0
    • Views: 2,957
    06-01-2010, 02:48 PM Go to last post
  19. Please help - all pi values are high!

    Hi there, I was about to prove my argument how different variables affect water availibility in different countries. Unfortunately, I ran the...

    Started by Sylviastat‎, 07-16-2011 06:34 AM
    • Replies: 11
    • Views: 2,957
    07-17-2011, 07:17 PM Go to last post
  20. What econometric method for macroeconomic trade data?

    Hello, I am working with a data set with trade data of one specific good of 173 countries from 1990 to 2010 in STATA. For every year and a pair of...

    Started by DanielFox‎, 09-30-2013 04:10 PM
    • Replies: 3
    • Views: 2,955
    10-01-2013, 08:57 AM Go to last post
  21. Question Time series or just repeated measures?

    Hi All, I have data on 7 clusters (ie, sites). The date are monthly counts (there is no zero inflation in most of the outcomes of interest...most...

    Started by SabbyATL‎, 04-14-2011 09:14 PM
    clusters, count data, repeated measures, time series
    • Replies: 0
    • Views: 2,954
    04-14-2011, 09:14 PM Go to last post
  22. Linear regression- If you ever wanted a chance to save somebody's life...this is it!

    Hi guys, I will be forever grateful for some help with SPSS and linear regression. Here is my data set: -I have questionnaire data from...

    Started by melsuett‎, 04-02-2010 05:25 PM
    • Replies: 1
    • Views: 2,952
    04-02-2010, 06:10 PM Go to last post
  23. Regression Variable (Only Applicable to Certain Cases)

    Hi, I'm doing a multiple linear regression. One of the variables I am using is a continuous numerical variable, however, it only applies to about...

    Started by StatsStacey‎, 03-26-2011 11:43 AM
    • Replies: 1
    • Views: 2,949
    03-27-2011, 08:47 PM Go to last post
  24. Unhappy Very basic questions on some terms.

    I apologize if this is a little too basic for you, but I'm an RN taking statistics ovr the summer and my brain just doesn't work like this. My...

    Started by smarge117‎, 07-12-2008 03:50 PM
    • Replies: 6
    • Views: 2,948
    07-13-2008, 07:25 PM Go to last post
  25. Weightings Problem

    I have been given an EXCEL model and my assigned task is (only) to fix it for problems that I might call "unintended consequences" of the underlying...

    Started by deanalt‎, 07-16-2007 09:32 PM
    • Replies: 4
    • Views: 2,947
    07-19-2007, 02:33 PM Go to last post
  26. Should I transform my scores?

    I am using correlation scores as the dependent variable in a multiple regression e.g. I am looking at which personality factors predict how well...

    Started by Lizzie_Liz‎, 02-01-2010 06:29 AM
    • Replies: 0
    • Views: 2,946
    02-01-2010, 06:29 AM Go to last post
  27. P-value for a regression where expected slope is 1:1

    Hi, I am comparing two values for vegetation cover from two time periods. The expected value is y=x for the slope. I am curious how to calculate a...

    Started by drm258‎, 11-23-2016 07:09 PM
    • Replies: 6
    • Views: 2,945
    11-26-2016, 09:40 AM Go to last post
  28. Question Regression Analysis Help

    Hi All, first post here, glad to be part of this forum. After surveying my population, I am currently experimenting what factors (about 10...

    Started by MohammedT‎, 09-04-2010 12:53 PM
    • Replies: 4
    • Views: 2,944
    09-04-2010, 04:36 PM Go to last post
  29. Output of Cox regression in SPSS

    Hi! When i ran cox regression model with categorical variables having more than 2 classess what does the first sig. value mean? For ex. ...

    Started by arkiaamu‎, 09-02-2013 04:55 AM
    • Replies: 0
    • Views: 2,943
    09-02-2013, 04:55 AM Go to last post
  30. Comparing Regression Slopes Across 3 Groups - SPSS

    I am running a simple regression with one dependent variable and one independent variable but splitting the results by group (3 groups). So, I am...

    Started by JerLon‎, 01-03-2014 06:56 PM
    • Replies: 4
    • Views: 2,942
    01-04-2014, 05:47 PM Go to last post
  31. Standard Regression Analysis / urgent help for stats beginner.

    Hi Guys! I'm fairly new to statistics and am conducting a standard regression analysis with 1 predictor variable ( following from a pearsons...

    Started by Valeriosmith‎, 11-22-2016 06:50 AM
    • Replies: 5
    • Views: 2,942
    11-22-2016, 12:57 PM Go to last post
  32. Need your help with AIC and model selection

    Hello. If someone could help me with this problem, I would really appreciate it!! I am working on multiple Mantel tests (like multiple regression)....

    Started by fsms‎, 12-05-2007 03:56 AM
    • Replies: 1
    • Views: 2,941
    12-06-2007, 02:14 PM Go to last post
  33. Post how to fit a parametric model based on generalized additive model

    hello everyone: i have fitted a generalized additive model with SAS. but i didn't find the methods to transform the loess smoothing parameters...

    Started by leoliao19861023‎, 08-21-2013 10:59 AM
    • Replies: 0
    • Views: 2,941
    08-21-2013, 10:59 AM Go to last post
  34. HELP with the concept of "percentile" (for regressions)

    Hello everybody. This is my first post and I hope someone can help me with a problem I have. I am a complete begineer in statistics, I studied them...

    Started by KansaiRobot‎, 10-25-2011 10:00 PM
    • Replies: 2
    • Views: 2,940
    10-28-2011, 01:20 AM Go to last post
  35. Random Regression Analysis

    I posted this in the R forum, which was the incorrect place to put this I think. I have a set of data that includes: 15 repeated measures for...

    Started by segerfan83‎, 02-06-2012 02:09 PM
    • Replies: 0
    • Views: 2,939
    02-06-2012, 02:09 PM Go to last post
  36. Error Propagation in Multivariable Regression

    I've spent all day reading Matlab tutorials and can't seem to find anything about propagating error in regression analysis. I have a set of x and y...

    Started by lizakova‎, 04-20-2011 05:41 PM
    • Replies: 0
    • Views: 2,937
    04-20-2011, 05:41 PM Go to last post
  37. choosing β0 and β1 to minimize the residual sum of squares

    I'm reading a book called , and I have a question in regards to the material inside. I understand that we can find the residual sum of squares by...

    Started by Frenchie‎, 07-26-2014 11:53 PM
    • Replies: 0
    • Views: 2,937
    07-26-2014, 11:53 PM Go to last post
  38. 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: 2,936
    04-22-2014, 01:37 PM Go to last post
  39. Logistic Regression - Predicted Probabilities with unknown variables

    Hi all, I'm wondering about how to calculate predicted probabilities using a binary logistic regression model when one or more of the variables in...

    Started by augustin‎, 12-06-2016 05:21 PM
    logistic regression
    • Replies: 2
    • Views: 2,936
    12-07-2016, 10:11 AM Go to last post
  40. Is this possible?

    I have found some scientific papers in which a spline regression is performed with a categorical dependent (death) and a continuous predictor. In the...

    Started by Ferro‎, 08-13-2010 05:12 AM
    • Replies: 2
    • Views: 2,935
    08-14-2010, 11:28 AM Go to last post
  41. Regression or LSD for discrete quantitative factor?

    I have a 2-factor factorial experiment where Factor A is quantitative and continuous with 2 levels (100 and 200). Factor B is quantitative, but...

    Started by brownmoses‎, 12-28-2009 12:55 PM
    • Replies: 0
    • Views: 2,934
    12-28-2009, 12:55 PM Go to last post
  42. Std deviation of correlation coefficient?

    Hi I've run a VAR model to find the correlation coefficient between two stock markets. Now I need to find the standard deviation of this...

    Started by Bill77‎, 07-27-2011 06:31 PM
    • Replies: 1
    • Views: 2,934
    07-27-2011, 07:29 PM Go to last post
  43. multilevel modelling: predicting random effects for new clusters

    Hi: I have a query I'm hoping someone may be able to help with. I've chatted to a few people and looked at texts and the literature but haven't...

    Started by sigmundo‎, 04-24-2015 05:06 AM
    • Replies: 9
    • Views: 2,934
    04-28-2015, 11:13 AM Go to last post
  44. How to approach model selection

    Hi, This is my first formal attempt at a regression analysis that we hope to write up and submit. Basically we're wanting to investigate the effect...

    Started by pgseye‎, 05-20-2011 02:44 PM
    • Replies: 4
    • Views: 2,931
    05-21-2011, 02:07 AM Go to last post
  45. Hypothesis Testing in Regression

    I have fit a multilinear regression with response Y and predictors x1, x2, x3, x4 and x5. I have constructed a hypothesis i wish to test. The null is...

    Started by Wizboar‎, 05-07-2013 08:29 PM
    • Replies: 5
    • Views: 2,931
    05-07-2013, 11:58 PM Go to last post
  46. Regression involving likert scale response

    Hi, I am trying to carry out regression analysis. I would like my dependent variable to be a Yes/No type, and my independent variables to be...

    Started by sparkeymd‎, 09-11-2013 12:50 PM
    likert scale analysis, regression
    • Replies: 8
    • Views: 2,926
    10-09-2013, 08:57 PM Go to last post
  47. pearson correlation with linear regression scenario please!

    I was wondering if anyone could give me an example of a pearson correlation with linear regression scenario?

    Started by Japetto‎, 07-27-2011 08:11 AM
    • Replies: 1
    • Views: 2,924
    07-27-2011, 05:22 PM Go to last post
  48. Interpretation of Marginal effects in Tobit model

    hi ,,,, i have estimated censored regression model and also estimated the marginal effects after log transformation of dependent variable. guide...

    Started by rrebecca6‎, 12-14-2013 10:27 AM
    • Replies: 0
    • Views: 2,923
    12-14-2013, 10:27 AM Go to last post
  49. When removing influential outliers creates more, what then?

    Hello good folks, I am conducting multiple regression for a meta analysis, with the dependent y variable being a range of values ($/ha/year)...

    Started by samuelle‎, 07-24-2014 09:32 AM
    • Replies: 7
    • Views: 2,922
    07-25-2014, 08:49 AM Go to last post
  50. Lightbulb Spanning test with short sales constraints - how does it works?

    Dear all, I need to perform a spanning test with short sales constraint to assess the diversification potential of microfinancial assets. I red...

    Started by sebneedhelp‎, 03-21-2011 01:55 PM
    • Replies: 0
    • Views: 2,921
    03-21-2011, 01:55 PM Go to last post
  51. multiple comparison issue in linear regression

    I am puzzled by the following question: If you have a 3-level categorical predictor in a linear regression model, you will get 2 estimated...

    Started by nahh‎, 11-05-2008 04:41 PM
    • Replies: 0
    • Views: 2,920
    11-05-2008, 04:41 PM Go to last post
  52. GEE and sample size

    Hello, I'd like to know how to correct for small sample size in GEE.

    Started by Itddoo‎, 12-07-2011 02:48 PM
    • Replies: 1
    • Views: 2,920
    12-07-2011, 03:44 PM Go to last post
  53. Type 1 error in regression with entire populations

    I have read that you are not supposed to keep choosing different levels of the categorical variable to be the reference level, because this can cause...

    Started by noetsi‎, 10-13-2016 11:55 AM
    • Replies: 14
    • Views: 2,915
    10-15-2016, 10:50 AM Go to last post
  54. Poisson distribution - goodness of fit

    I want to test goodness of fit for poisson distribution for a very large data set (~millions of records). Can anybody suggest a method? All the...

    Started by anujg‎, 07-13-2011 03:57 AM
    chi square, discrete random variables, goodness of fit, large data sets, poisson distribution
    • Replies: 1
    • Views: 2,913
    07-13-2011, 04:20 AM Go to last post
  55. Overall effect size measure for categorical variable

    Dear forum, I am running logistic regressions with categorical predictors (nominal, several categories, dummy coded). I use a LRT to test...

    Started by Thomas‎, 10-29-2011 07:34 AM
    • Replies: 0
    • Views: 2,913
    10-29-2011, 07:34 AM Go to last post
  56. Assessing the relationship between a continuous variable and categorical variables

    Hello! I have a problem for which I have trouble finding a solution. I would like to assess the relationship between a continuous dependent...

    Started by CheersToStata‎, 09-09-2013 11:32 AM
    • Replies: 2
    • Views: 2,913
    09-09-2013, 12:20 PM Go to last post
  57. Additive regression question

    Currently, I'm trying to create a regression equation that can help my boss predict employee hours for the upcoming month. Basically, if we already...

    Started by treystasio‎, 06-21-2010 08:31 PM
    • Replies: 3
    • Views: 2,912
    06-25-2010, 01:54 PM Go to last post
  58. robust regression estimators

    Hi everyone. I have studied the robust regression a few weeks ago and I want to have a lot of insight about it. After reading some sources, I know...

    Started by Pamona D‎, 01-30-2017 08:23 AM
    regression analysis, robust linear regression
    • Replies: 2
    • Views: 2,912
    01-30-2017, 11:00 AM Go to last post
  59. Exclamation Multi linear regression

    Hello everyone, I am new here (and to stats in general). Anyway I am working on a project where I want to predict the value of an outcome and I...

    Started by JohnLock‎, 01-23-2012 07:24 AM
    multi linear regression
    • Replies: 7
    • Views: 2,911
    01-26-2012, 12:57 PM Go to last post
  60. How to investigate a curvilinear relationship? (power curve?)

    Hi there, Can anyone tell me how to explore this relationship on SPSS using a regression analysis? I have been advised that this relationship...

    Started by crook‎, 01-19-2017 01:01 PM
    • Replies: 13
    • Views: 2,909
    01-19-2017, 11:57 PM Go to last post

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