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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. How to integrate an interaction term into a fixed effect model?

    Hi, I have a balanced panel data set for t=2. I want to estimate a fixed effects model in the following way: Y= β(0) + β(1)*x + β(2)*z +...

    Started by JB81‎, 07-29-2014 07:21 AM
    • Replies: 0
    • Views: 413
    07-29-2014, 07:21 AM Go to last post
  2. Question about homoscedasticity (for a probably non-linear relation)

    I predict that independent variable X, has an U-shaped relation with dependent variable Y. I test this assumption using a regression analysis...

    Started by rob1‎, 07-28-2014 11:59 AM
    • Replies: 1
    • Views: 530
    07-28-2014, 12:04 PM Go to last post
  3. weight of evidence

    If WOE>0, what does it imply?

    Started by nancy10‎, 07-28-2014 09:11 AM
    • Replies: 0
    • Views: 371
    07-28-2014, 09:11 AM Go to last post
  4. "Averaging" linear trends = linear regression slopes ?

    Hello everyone, I was not able to find a solution for the following question, explaining it with a simple example: We have N=12 weather boxes...

    Started by statQuestions‎, 07-27-2014 05:02 PM
    • Replies: 1
    • Views: 441
    07-27-2014, 06:18 PM Go to last post
  5. correlation of trends?

    Hi, I have extracted trends from two time series (one correspond to some climate parameters, the other one to chemical composition of tree...

    Started by Valido‎, 07-23-2014 04:34 AM
    • Replies: 1
    • Views: 612
    07-27-2014, 05:11 PM Go to last post
  6. Finding correlation of independent variables with a response variable in R

    I have a set of independent variables X1, X2, X3,..., Xn and a response variable Y. I want to perform some form of data analysis in R so that I only...

    Started by osmankhalid2005‎, 07-26-2014 09:00 PM
    correlation analysis, multi linear regression
    • Replies: 3
    • Views: 770
    07-27-2014, 07:23 AM Go to last post
  7. Extend economics thesis with multivariate analysis

    Dear all, Working on my Master Thesis I got the remark from my supervisor that I have to extend the research with a multivariate analysis. I have...

    Started by MaartenvK‎, 07-26-2014 07:31 AM
    economics, multiple, multivariate, multivariate analysis, regression analysis
    • Replies: 3
    • Views: 571
    07-27-2014, 06:11 AM Go to last post
  8. 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, 07-27-2014 12:53 AM
    • Replies: 0
    • Views: 1,731
    07-27-2014, 12:53 AM Go to last post
  9. Exclamation Partial Least Square Regression_Interpretation of Result_VIP_Model Equation_urgentpls

    Hello! I would like to ask your help about the interpretation of my results. So I am doing an analysis about which among the environmental predictors...

    Started by desireeeve‎, 07-26-2014 07:43 AM
    interpreting output, interpreting regression, model, multiple regression
    • Replies: 6
    • Views: 733
    07-26-2014, 12:53 PM Go to last post
  10. Change score as the DV with change scores as IVs - Category mistake?

    I have a theory that needs to be tested. The idea is that an IV "change in the knowledge of", and an IV "change in the sense of importance" of...

    Started by urban_planner‎, 07-26-2014 02:35 AM
    • Replies: 0
    • Views: 407
    07-26-2014, 02:35 AM Go to last post
  11. Looking for a good beginners guide to Regression Analysis using Excel

    I am looking for a good beginners guide to Regression Analysis using Excel. Any recommendations? Thanks!

    Started by stat_101‎, 07-25-2014 12:14 PM
    regression analysis
    • Replies: 2
    • Views: 497
    07-25-2014, 02:33 PM Go to last post
  12. 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 10:32 AM
    • Replies: 7
    • Views: 1,218
    07-25-2014, 09:49 AM Go to last post
  13. Multiple Regression while variables kept constant


    Started by noslehs‎, 07-17-2014 09:13 AM
    • Replies: 6
    • Views: 867
    07-23-2014, 04:02 PM Go to last post
  14. Dummy Variable Interactions

    Hi all, At the moment I'm working on an analysis of wage inequality and have come across a considerable stumbling block. I am trying to compare...

    Started by highlux‎, 07-23-2014 02:33 AM
    • Replies: 2
    • Views: 546
    07-23-2014, 02:39 PM Go to last post
  15. Best regression model when I am just using dummy variables as independent variables

    Dear all I am just wondering where to find help for my question. Hopefully this is the right place with many smart people. I am currently...

    Started by Kies886‎, 07-23-2014 08:45 AM
    • Replies: 1
    • Views: 433
    07-23-2014, 08:56 AM Go to last post
  16. R squared and Standard Error

    Hi, Can standard error be 94.10 when R squared is 0.67 in a linear model? Thanks.

    Started by john_f‎, 07-17-2014 06:29 AM
    r squared, standard error
    • Replies: 7
    • Views: 854
    07-22-2014, 03:31 PM Go to last post
  17. ATE - teffects vs xtlogit

    Hi. I am measuring the average treatment effect on two groups, using STATA´s teffects regression adjustment estimator. The STATA output reports...

    Started by Kristian Korbu‎, 07-22-2014 07:15 AM
    • Replies: 0
    • Views: 487
    07-22-2014, 07:15 AM Go to last post
  18. Scaling independent variable in regression

    I have a long data set collected over time on two variables and have done linear and polynomial regression on it with good results. I want to...

    Started by sdis‎, 07-20-2014 12:36 PM
    • Replies: 1
    • Views: 499
    07-20-2014, 07:12 PM Go to last post
  19. Post How to model my variables into a probit

    Hey guys, Got a tricky issue here... I am trying to estimate a probit model. The binary dependent variable is employment status and the...

    Started by Dwayne Johnson‎, 07-20-2014 03:38 PM
    • Replies: 0
    • Views: 406
    07-20-2014, 03:38 PM Go to last post
  20. Test of Significance - Confidence Interval

    Hi All, I need some help from any kind soul who is able to shed some light on my query: I have a 95% confidence interval for a mediation effect...

    Started by timneill‎, 07-20-2014 05:34 AM
    • Replies: 0
    • Views: 524
    07-20-2014, 05:34 AM Go to last post
  21. Odds ratio of 1 for bivariate logistic regression

    My wonderous memory is that an odds ratio near 1 is not remotely substantively important, much like a zero slope would be in OLS. But I have a highly...

    Started by noetsi‎, 06-18-2012 08:40 PM
    • Replies: 14
    • Views: 4,394
    07-19-2014, 03:51 PM Go to last post
  22. Logistic Regression - Interpretation issue - Odds Ratios near 1

    Hello, I have some several doubts about the logistic regression. I am working with stata in the logisitc regression and my binary input variables...

    Started by EisnerK‎, 07-19-2014 11:55 AM
    • Replies: 0
    • Views: 365
    07-19-2014, 11:55 AM Go to last post
  23. Repeated measure nested within individuals?

    Hi, All, (I'm a beginner so my question could be really dumb...) So, I have a set of data that contains 30 schools' variable A and variable B....

    Started by shenyushui‎, 07-17-2014 01:03 PM
    • Replies: 1
    • Views: 477
    07-17-2014, 01:46 PM Go to last post
  24. Regression of calories consumed and body weight

    So I want to understand whether the relationship between calories consumed and body weight differs between males and females. I have data from 20...

    Started by emily.stats‎, 07-17-2014 11:09 AM
    • Replies: 2
    • Views: 538
    07-17-2014, 11:30 AM Go to last post
  25. Logistic regression significant test

    Dear all, I have done logistic regression for 20 independent variables for which all of them are categorical (0 and 1) also 1 binomial response...

    Started by smurts‎, 07-16-2014 10:06 AM
    • Replies: 4
    • Views: 660
    07-16-2014, 05:50 PM Go to last post
  26. Test for absolute value of coefficient

    After running a simple linear regression I estimate a coefficient beta. I want to test the null that the absolute value of beta is less than or...

    Started by Laurie‎, 07-16-2014 04:06 PM
    • Replies: 0
    • Views: 429
    07-16-2014, 04:06 PM Go to last post
  27. What kind of regression should I use?

    I have next problem. I want to investigate the relation between life stages (string variable) and organizational ambidexterity (numeric variable),...

    Started by rob1‎, 07-16-2014 11:19 AM
    • Replies: 0
    • Views: 425
    07-16-2014, 11:19 AM Go to last post
  28. In a negative binomial GLM or GLMM what does theta stand for?

    When using a GLM or GLMM with a negative binomial distribution in R it is usually necessary to set the value of theta in the model. But what does...

    Started by shardman‎, 07-16-2014 11:10 AM
    glm, glmm, negative binomial, theta
    • Replies: 0
    • Views: 553
    07-16-2014, 11:10 AM Go to last post
  29. Unexpected output for multivariate logistic regression

    Hi, After I'd tested a couple of univariate logistic regressions for all of my IVs, I runned a multivariate logistic regression with all the IVs...

    Started by c_alderweireld‎, 07-16-2014 06:28 AM
    • Replies: 2
    • Views: 552
    07-16-2014, 08:50 AM Go to last post
  30. Smile Derived importance of attributes in a political survey

    Hello! I'd like to ask some help with determining derived importance of attributes (like what are given by Shapley values /...

    Started by thehiggsboson‎, 06-18-2014 10:49 AM
    • Replies: 1
    • Views: 1,000
    07-15-2014, 07:35 PM Go to last post
  31. Multinomial Logit model does not reflect the data - Possible explanations?

    I am running a study in which respondents are physicians shown patient profiles based on pre-determined characteristics (e.g. age, patient history,...

    Started by Injektilo‎, 07-15-2014 07:27 PM
    • Replies: 0
    • Views: 473
    07-15-2014, 07:27 PM Go to last post
  32. Reverted coefficient

    Dear all, I really hope somebody can help me out here. I have a problem concerning the outcome of my hierarchical multiple regression model. I...

    Started by MaxStat‎, 07-15-2014 08:49 AM
    • Replies: 4
    • Views: 615
    07-15-2014, 02:39 PM Go to last post
  33. Durbin Watson related with outliers?

    I am trying to run a multiple regression with a sample data belongs to a cohort of 500 subjects. My dependant variable is a psychological score...

    Started by rezzak‎, 07-14-2014 09:15 AM
    durbin watson, outliers
    • Replies: 3
    • Views: 1,050
    07-15-2014, 10:07 AM Go to last post
  34. 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 03:06 PM
    • Replies: 5
    • Views: 661
    07-15-2014, 08:06 AM Go to last post
  35. Determine how much data is required by determining when graph levels out

    I have a bunch of graphs for data that I have collected in my last experiment. The graphs are usually shaped similar to either exponential curves or...

    Started by Phdstudentz‎, 07-11-2014 06:13 PM
    levels out, minimum data, steady state
    • Replies: 12
    • Views: 1,050
    07-15-2014, 07:52 AM Go to last post
  36. Curve fitting of individual or multiples curves

    Hi, In curve fitting, Is it acceptable to perform a curve fitting of multiples curves overlaped in the same plot or is it neccesary to fit each curve...

    Started by chuy‎, 07-13-2014 12:11 PM
    fitting a curve
    • Replies: 0
    • Views: 444
    07-13-2014, 12:11 PM Go to last post
  37. What I can conclude if the CI of different regression models are not overlapping?

    I asked to build a graph of the means and confidence intervals of β1 values from 4 regression models and conclude about their statistical...

    Started by Scrooge‎, 07-11-2014 03:51 PM
    • Replies: 4
    • Views: 652
    07-12-2014, 12:33 PM Go to last post
  38. Using pooled OLS when running a model with panel data?

    How bad is it to use pooled OLS instead of fixed effects when you have 7 years of panel data? From what I have understood, the risk is that the...

    Started by Eric_B‎, 06-18-2014 05:23 AM
    • Replies: 1
    • Views: 3,095
    07-12-2014, 07:46 AM Go to last post
  39. Question General Linear Model

    My objective is to identify (F Ratio) the few independent variables in my manufacturing process that are affecting my dependent variable. My data...

    Started by Sdruley‎, 07-11-2014 06:44 PM
    • Replies: 2
    • Views: 646
    07-12-2014, 05:25 AM Go to last post
  40. Help a newbie with multiple statistical regression.

    I want to run a multiple stastical regression in SPSS, trying to correlate different biomarkers with a brain region (hippocampus), at the same...

    Started by trexter‎, 07-08-2014 12:16 PM
    • Replies: 4
    • Views: 924
    07-10-2014, 08:28 AM Go to last post
  41. 6 factors and a response

    Hello All, I have a spreadsheet with 6 factors and 1 response... i'm not sure if all the factors effect the response but I'm hoping there is a...

    Started by ilikeshirt‎, 07-04-2014 11:54 AM
    • Replies: 10
    • Views: 1,134
    07-08-2014, 11:52 AM Go to last post
  42. Required testing for poisson and negative binominal regression

    Hello everybody, I am making use of a poisson regression and a negative binominal regression. I am familiar with testing OLS-regression, but what...

    Started by geomo‎, 07-08-2014 11:08 AM
    • Replies: 0
    • Views: 390
    07-08-2014, 11:08 AM Go to last post
  43. Will a logarithmic transformation create curvilinearity?

    Hello All, Ok, I'm a bit stuck on this one. I ran a logarithmic transformation on my DV to overcome a serious skew and now I'm seeing quite a few...

    Started by Rob1983‎, 07-08-2014 09:01 AM
    • Replies: 2
    • Views: 434
    07-08-2014, 10:41 AM Go to last post
  44. Linear regression - missing data

    Hi, I am running a multiple linear regression which seems to be working well except for one problem: One of the explanatory variables is: does...

    Started by Emma93‎, 07-08-2014 03:46 AM
    • Replies: 0
    • Views: 472
    07-08-2014, 03:46 AM Go to last post
  45. understanding lending rates on lending applications

    Hi there, I was wondering if anyone had experience in modelling lending rates on lending applications? How do you interpret a negative...

    Started by kchan‎, 07-07-2014 09:07 PM
    • Replies: 0
    • Views: 366
    07-07-2014, 09:07 PM Go to last post
  46. Modelling help for poisson distribution

    I do feel like I'm running in circles here. I've a data set of rates (ie 40/1000) of about 1500 cases that fits a poisson distribution. This is the...

    Started by Hudson22‎, 07-07-2014 04:37 PM
    • Replies: 0
    • Views: 366
    07-07-2014, 04:37 PM Go to last post
  47. Age-adjusted incidence rate ratios using Poisson regression

    Hi All- I want to set up a SAS model for Poisson regression that will give me the age-adjusted incidence rate ratio for the incident cancer rate in...

    Started by kijohnson‎, 07-07-2014 01:46 PM
    • Replies: 0
    • Views: 1,297
    07-07-2014, 01:46 PM Go to last post
  48. Estimating 1 cointegrating relationship when trace test indicates rank=2

    Hi all, I am estimating a Vector Error Correction Model for several countries. For one country (call it X), the Johansen trace test suggests that...

    Started by CLP_PS‎, 07-04-2014 11:36 PM
    • Replies: 0
    • Views: 473
    07-04-2014, 11:36 PM Go to last post
  49. normality transformation and regression

    Hi, I have performed 1/sqrtY, and sqrtY transformations on different data sets to achieve normal distribution for simple linear regressions. So...

    Started by Deccantraps‎, 07-03-2014 04:52 AM
    normality transformation, regression
    • Replies: 6
    • Views: 723
    07-04-2014, 04:11 AM Go to last post
  50. Question help with different sample size contrast matrix in linear regression

    Hi everyone, I am very confused about the contrast matrix, could some one explain a little bit for me? Or could you please give a link or book...

    Started by crazyhottommy‎, 07-03-2014 10:04 PM
    • Replies: 0
    • Views: 393
    07-03-2014, 10:04 PM Go to last post
  51. winsorisation of a numerical scale from 1 to 23 assigned to the credit rating

    Dear Members, Iam preparing a regression model and my supervisor told me to winsorise all the variables. However, among the variables I have a...

    Started by granis89‎, 07-03-2014 06:59 PM
    credit rating, linear regression, outliers, winsorization
    • Replies: 0
    • Views: 428
    07-03-2014, 06:59 PM Go to last post
  52. Understanding output of logistic regression

    Hi I would appreciate if someone could help me with understanding the output of my logistic regression analysis. I myself have not much knowledge of...

    Started by Fenomeno‎, 07-03-2014 06:39 PM
    • Replies: 0
    • Views: 479
    07-03-2014, 06:39 PM Go to last post
  53. Predicting sales with customer types

    Hi All, I've been given some data on the number of households of each type in a postal area and the sales figure for that postal area. e.g....

    Started by hasty82‎, 07-03-2014 06:45 AM
    • Replies: 0
    • Views: 348
    07-03-2014, 06:45 AM Go to last post
  54. what is a midpoint?

    Hello, I am learning logistic regression using the book Applied logistic regression by Hosmer and Lemeshow (2000). On page 107, there is a table...

    Started by t.wang21@yahoo.com.au‎, 07-02-2014 09:35 PM
    • Replies: 4
    • Views: 613
    07-02-2014, 10:25 PM Go to last post
  55. Interaction terms in regression-theory

    I am learning categorical variables and interaction terms in the regression course and there few things I don't understand. Suppose a salary...

    Started by Clarkson‎, 07-01-2014 10:30 PM
    categorical data, interaction terms, regression analysis
    • Replies: 1
    • Views: 447
    07-02-2014, 02:37 PM Go to last post
  56. categorical variables in regression analysis and interaction terms

    I am learning multiple regression with categorical variables and in a book I came across this problem. For yield of corn suppose there are two...

    Started by Clarkson‎, 07-02-2014 06:32 AM
    categorical data, interaction term, regression analysis
    • Replies: 1
    • Views: 596
    07-02-2014, 02:33 PM Go to last post
  57. Predictions after mean-centred regression

    Hi, I wonder if anyone can help me with a problem I'm having. I just performed an ordinary (LS) regression in which both the dependent and...

    Started by CharlieMurphy‎, 07-02-2014 07:03 AM
    centering variables, least squares, log linear
    • Replies: 1
    • Views: 434
    07-02-2014, 02:18 PM Go to last post
  58. Dgrees of freedom of error sum of squares

    For a given metal a experiment was carried out to measure the heat variation with temperature in Celsius.The heat was measured twice at each chosen...

    Started by Clarkson‎, 07-02-2014 06:39 AM
    anova, degrees of feedom, regression analysis
    • Replies: 2
    • Views: 514
    07-02-2014, 06:46 AM Go to last post
  59. Interpretation lagged probit model

    Hi there, First of all I''m not sure if this should be posted here or under the statistical software topics but anyway... I have two time-series,...

    Started by Mkkl‎, 06-26-2014 01:17 PM
    probit interpretation
    • Replies: 0
    • Views: 503
    06-26-2014, 01:17 PM Go to last post
  60. Question Unorthodox Calibration Technique

    Hi All, Here is the background to my situation. I have a product that is chips of plastic, ranging from 12mm to 0mm, average size about 4mm. I...

    Started by Paul Marshall‎, 06-25-2014 03:46 PM
    • Replies: 1
    • Views: 529
    06-25-2014, 04:32 PM Go to last post

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