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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Variance inflation and interactions between variables?

    Hello everyone I am having trouble interpreting some of my results. I am using logistic regression to infer a model based on measured data....

    Started by enur‎, 08-03-2012 09:54 AM
    categorical data, gvif, interaction terms, logistic regression, vif
    • Replies: 8
    • Views: 13,692
    01-05-2015, 01:34 PM Go to last post
  2. Multiple Regression analysis

    Hello Everyone, Can anyone please tell me, how one can compute the total score of dependent variables in order to do regression analysis?? ...

    Started by ashima‎, 05-15-2013 07:52 AM
    • Replies: 8
    • Views: 1,899
    05-16-2013, 02:31 AM Go to last post
  3. 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: 3,142
    04-16-2013, 11:45 AM Go to last post
  4. binary independent and binary dependent variables

    Hi all, Is it possible to run a regression with binary independent variables and binary dependent variables. i.e 0 & 1 value ind variables and 0...

    Started by Windows7‎, 02-20-2013 10:19 PM
    • Replies: 8
    • Views: 3,538
    02-21-2013, 12:44 AM Go to last post
  5. Interpetation of Ordinal Logistic regression parameter

    I am using effect coding and have a question on the interpetation of a p value for individual parameters of a categorical predictor (which SAS breaks...

    Started by noetsi‎, 02-12-2013 11:37 AM
    • Replies: 8
    • Views: 2,461
    02-12-2013, 05:07 PM Go to last post
  6. Help understanding Microsoft Excel ANOVA output (Significance F ?)

    Hi, So I created my own very simple excel table, with a set of X and Y values, and then I told Excel to run a regression analysis. ...

    Started by spearchew‎, 05-22-2013 08:29 AM
    • Replies: 8
    • Views: 19,347
    05-23-2013, 12:43 PM Go to last post
  7. Polynomial regression question

    Say you have a linear and quadratic term. Is it possible for the linear term to be not signficant, and the quadratic term be signficant? If so, what...

    Started by noetsi‎, 06-05-2013 12:30 PM
    • Replies: 8
    • Views: 2,981
    06-11-2013, 11:17 AM Go to last post
  8. Doing a stepwise mutiple regression

    Hi everyone, I've got two continuous DVs (N = 48, so not a huge sample) and three inter-correlated, continuous IVs. I'm interested in finding out...

    Started by lindles‎, 08-13-2013 07:01 AM
    • Replies: 8
    • Views: 2,287
    08-13-2013, 11:05 AM Go to last post
  9. comparing regression coefficients between different models to see if they are similar

    Hi all; This is a very elementary problem; but unfortunately, my strengths do not like in statistics: I am trying to describe plant growth over...

    Started by catbelize‎, 08-22-2013 03:47 AM
    coefficients, polynomial regression, standard error
    • Replies: 8
    • Views: 1,435
    08-23-2013, 09:23 AM Go to last post
  10. 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: 2,924
    10-09-2013, 08:57 PM Go to last post
  11. Fitting of a linea mixed model

    Hello I'm trying to modelize the diving depth of birds according to categorical (sex, age class: adults/subadults) and conitnuous parameters...

    Started by Alex939‎, 09-26-2013 05:00 PM
    • Replies: 8
    • Views: 2,147
    09-27-2013, 08:36 AM Go to last post
  12. Advice is needed about log.regression and research group

    hello, I have started my first journey to logistic regression, and i have already got my first problem. so, my SPSS merged file contains: -...

    Started by badibad‎, 10-11-2013 01:48 PM
    • Replies: 8
    • Views: 1,357
    10-11-2013, 04:51 PM Go to last post
  13. Logistic regression: how to get ORs and CIs for non-included variables

    I'm working on a modeling project using logistic regression with forward selection. I would like to be able to determine the odds ratios and...

    Started by madformath‎, 11-30-2013 11:29 AM
    • Replies: 8
    • Views: 3,276
    12-01-2013, 09:18 PM Go to last post
  14. Call Center Prediction Model

    I have an interesting task to determine the best model for forecasting the number of calls coming into our call center each hour of the day. One...

    Started by syswizard‎, 12-10-2013 10:15 AM
    • Replies: 8
    • Views: 2,605
    12-13-2013, 10:02 AM Go to last post
  15. Multiple regression returning strange output?

    Hi, Trying to run a multiple regression. The dependent variable is cost of life insurance. The independent variables are age and face amount. ...

    Started by francoisd‎, 02-04-2014 09:07 PM
    • Replies: 8
    • Views: 1,804
    02-10-2014, 04:40 PM Go to last post
  16. what shall I do if I find too many significant interaction terms?

    I am estimating a logistic regression model and have developed main effects model. I have found that the interaction of a categorical independent...

    Started by t.wang21@yahoo.com.au‎, 02-06-2014 09:21 PM
    • Replies: 8
    • Views: 2,733
    02-07-2014, 10:06 PM Go to last post
  17. number of variables for a model

    I am now trying to build a cox model: h(t, beta) = h0(t)exp(X*beta) I have selected some variables from the data, and for a category variable, if...

    Started by pepsico007‎, 02-22-2014 11:40 AM
    cox, model, regression, survival analysis, variable selection
    • Replies: 8
    • Views: 3,041
    03-25-2014, 06:05 PM Go to last post
  18. On comparisons of (standardized) regression coefficients...

    hello there. i decided to put together this as a thread and not a series of chat exchanges because i think quite a few people may be able to benefit...

    Started by spunky‎, 02-27-2014 09:45 PM
    • Replies: 8
    • Views: 2,086
    02-28-2014, 01:42 AM Go to last post
  19. [SOLVED] Describe curve of growth model

    I'm reading a paper now and want to describe the curves as seen here: Are the bottom 2 lines considered exponential decay. What would the...

    Started by trinker‎, 03-18-2014 01:26 PM
    • Replies: 8
    • Views: 1,904
    03-18-2014, 08:05 PM Go to last post
  20. Interpreting the regression RMSE when responses are measurements with known SD

    Hi all, I'm fitting a simple regression model (Y = a + bX) where my responses are measurements whose standard deviations, SD, are available....

    Started by fgg‎, 07-19-2014 09:04 PM
    • Replies: 8
    • Views: 4,258
    07-29-2014, 07:11 PM Go to last post
  21. Non-parametric regression

    I am relatively new to this so excuse my ignorance. As best I can tell non-parametric regression has no coefficients (no slopes). It does have...

    Started by noetsi‎, 08-25-2014 03:02 PM
    • Replies: 8
    • Views: 1,772
    08-26-2014, 10:25 AM Go to last post
  22. regression or remosre??!!

    what are the differences between remorse and regression????????????????????

    Started by haraharae‎, 09-12-2014 12:51 PM
    • Replies: 8
    • Views: 3,618
    09-13-2014, 05:19 AM Go to last post
  23. Help to prove the relationship of regression coefficients of total data and sub-data

    Hello, The regression of total data set is:Y=aX+b0 The total data set is divided to two data sets. The regressions of the two sub data sets are:...

    Started by Samuel1204‎, 09-15-2014 12:34 PM
    • Replies: 8
    • Views: 2,311
    09-16-2014, 11:44 PM Go to last post
  24. Overdispersions and logistic regression

    Note the following comment on this: I have never been clear what the difference between grouped and ungrouped data is. My elements, notably...

    Started by noetsi‎, 09-19-2014 09:26 AM
    • Replies: 8
    • Views: 4,150
    09-20-2014, 08:04 AM Go to last post
  25. Writing R^2 strictly in terms of simple correlations among variables

    Say we have the following regression Y_i=\beta_0+\beta_1X_{1i}+\beta_2X_{2i}+\epsilon_i I want to write the multiple R^2 for this regression...

    Started by Jake‎, 10-17-2014 03:45 PM
    • Replies: 8
    • Views: 3,158
    02-07-2015, 07:06 PM Go to last post
  26. Addressing Heteroskedasticity: OLS (robust), OLS [aweight], VWLS (w/omega)

    Hello dear forum member, Your recent help with my model specification has been invaluable. I also followed your advise on reading the book by...

    Started by kiton‎, 01-31-2015 04:04 PM
    • Replies: 8
    • Views: 1,381
    02-03-2015, 01:16 PM Go to last post
  27. Ambulance utilisation: help choosing a method

    Hi, I need some advice in selecting a statistical test please. I am researching ambulance utilisation rates at a population level (defined by a...

    Started by john_martin‎, 02-04-2015 05:16 PM
    • Replies: 8
    • Views: 1,928
    02-06-2015, 04:57 AM Go to last post
  28. Comparing Models

    Today I was going to attempt to figure out and write some SAS code to compare nested linear models (variance explained). But I need some basics...

    Started by hlsmith‎, 04-28-2015 09:12 AM
    • Replies: 8
    • Views: 2,129
    04-28-2015, 01:31 PM Go to last post
  29. Hell Please. Linear Regression Model

    Which of the following is NOT assumed to contribute to uncertainty in predicting y from x in a standard Model I linear regression. a. Uncertainty...

    Started by helppleasestats‎, 05-18-2015 08:57 AM
    help me, linearregression, mcq
    • Replies: 8
    • Views: 1,612
    05-19-2015, 09:42 AM Go to last post
  30. Do I need to refer goodness of fit indices when I am only interested in estimates?

    Hello all, I am intersted in the relationship b/w 3 variables (A,B, and C). Then I constructed a path model as A->B->C. My only interest is how big...

    Started by MartenH‎, 06-04-2015 01:44 PM
    • Replies: 8
    • Views: 2,072
    06-09-2015, 11:38 AM Go to last post
  31. Help creating my first logistic Regression model

    Hi everyone, I`m new here, and new in the stats world, and i have several questions and need for help on how to proceed. First, what i`m doing...

    Started by Perdido‎, 07-06-2015 09:29 AM
    • Replies: 8
    • Views: 3,230
    07-06-2015, 03:21 PM Go to last post
  32. 1)Test multicollinearity b4/after Stepwise Log Regress? 2)Final Equatn 3)Model Select

    Hi all, I need to perform logistic regression for my study. Pretty new to it but have read up on it and have tried it on SPSS. I would like to...

    Started by atomic_beans‎, 07-20-2015 11:49 PM
    logistic regression, model selection, multicollinearity, spss, stepwise
    • Replies: 8
    • Views: 2,226
    07-25-2015, 06:13 AM Go to last post
  33. Fixed Effects Regression - Dependent Variable Issue

    Hi all, I am currently running a fixed effects model in Stata, and have a question regarding how to specify my dependent variable. So I have...

    Started by Magnus MMJ‎, 07-27-2015 05:12 PM
    • Replies: 8
    • Views: 1,795
    07-31-2015, 09:22 AM Go to last post
  34. Least Squares

    Delete. Unhelpful responses.

    Started by Dave Brunner‎, 09-08-2015 08:20 PM
    • Replies: 8
    • Views: 3,248
    09-09-2015, 06:21 PM Go to last post
  35. How to deal with repeated measures data in multiple linear regression?

    Hello, I am a novice in the area of regression analyses, and was hoping someone could shed some light on my situation. I will be conducting a...

    Started by tylerbweaver‎, 09-22-2015 09:56 AM
    • Replies: 8
    • Views: 1,853
    09-22-2015, 03:51 PM Go to last post
  36. Ordinal regression shows negative effect when spearman correlation shows positive

    I running a regression model where a variable is indicated to have a negative impact on the predicted variable: Estimate Std....

    Started by micdhack‎, 09-30-2015 12:26 PM
    • Replies: 8
    • Views: 2,371
    10-01-2015, 02:35 PM Go to last post
  37. Logistic Regression of NFL Data

    Week 5 picks from a logistic regression model for the NFL: http://trevorbischoff.com/nfl-2015-week-5-predictions/

    Started by LeeBalto‎, 10-07-2015 08:00 AM
    logistic regression, modeling, prediction
    • Replies: 8
    • Views: 5,151
    12-30-2015, 01:19 PM Go to last post
  38. Trend analysis / regression model with missing data

    Hi, I want to apply a Poisson GLM to count data, analyzing trends. However, there are missing counts (i.e. missing values in the outcome variable)...

    Started by mmercker‎, 01-26-2016 07:18 AM
    imputation, missing data, regression analysis, trend analysis
    • Replies: 8
    • Views: 2,025
    01-28-2016, 09:19 AM Go to last post
  39. Ordinal predictors

    I know there was a thread on this. I could not find it. This is the type of issue that concerns me. These authors had an ordinal predictor that...

    Started by noetsi‎, 02-22-2016 11:44 AM
    • Replies: 8
    • Views: 1,201
    02-22-2016, 05:10 PM Go to last post
  40. Unhappy Regression: DV is Revenue and IDV is cost. (Very High MAPE)

    Need help on one of the modelling assignment. My dependent variable is Revenue and the independent variable is Cost beside some other variables...

    Started by vikash_124124‎, 03-09-2016 01:47 AM
    mape, regression
    • Replies: 8
    • Views: 1,770
    03-11-2016, 09:24 AM Go to last post
  41. Relative impact of predictors in linear regression

    I want to rank variables from most to least important, in terms of impact on the DV. My predictors are either interval or dummy. My DV is interval. I...

    Started by noetsi‎, 04-11-2016 11:08 AM
    • Replies: 8
    • Views: 2,475
    04-14-2016, 09:02 AM Go to last post
  42. Is this Multicollinearity?

    Hi guys, im relatively new in this forum. I have a question, i am using multiple regression analysis for my thesis. The result shows the P-value is...

    Started by LizBeth‎, 05-29-2016 11:04 PM
    • Replies: 8
    • Views: 1,218
    06-01-2016, 07:44 AM Go to last post
  43. Comparing fit of GLM to OLS regression

    Hello talkstat. First post in this magnificent forum! In my master thesis I'm estimating health care expenses to patients, who has experienced...

    Started by Steinberg‎, 08-24-2016 03:36 AM
    fit, glm, ols, transforming
    • Replies: 8
    • Views: 1,946
    08-29-2016, 06:28 AM Go to last post
  44. Multinomial logistic regression - testing assumptions

    Hello everyone, I'm trying to perform an MLR with 4 continuous predictors for one ordinal dependent. I've tested my assumptions for the MLR except...

    Started by debadog‎, 06-24-2016 09:55 AM
    • Replies: 8
    • Views: 2,006
    07-07-2016, 09:02 AM Go to last post
  45. Normality / QQ-Plot in Generalized Linear Models (GLM)

    Hi, sorry if this is a frequent question, but I did not find an appropriate answer: If I have a GLM with a non-normal distributed outcome...

    Started by mmercker‎, 06-26-2016 02:57 PM
    glm assumptions, glm diagnostocs, normality, qq-plot
    • Replies: 8
    • Views: 3,405
    07-06-2016, 07:59 PM Go to last post
  46. Post Dis./Avantadges of estimating of binary response model with OLS

    In the Maximum Likelihood Estimator context, I can't find answers for those two questions: - What are the advantages and disadvantages of...

    Started by endlessend25‎, 06-30-2016 07:03 AM
    binary response models, mle, ols
    • Replies: 8
    • Views: 2,016
    07-02-2016, 12:47 PM Go to last post
  47. Beta Regression Resources?

    Does anyone have some good resources for Beta Regression related to all of its parts: -assumptions -diagnostic (residuals) ...

    Started by hlsmith‎, 08-10-2016 04:04 PM
    beta regression, lemon squeezer
    • Replies: 8
    • Views: 2,528
    08-13-2016, 01:41 PM Go to last post
  48. Regression with additive and multiplicative predictors

    Hi, we are analyzing pollutants in mussels with regression models. Let's say we have only the two predictors (1) "year" and (2) "month". However,...

    Started by mmercker‎, 10-08-2016 12:44 PM
    additivem, regression
    • Replies: 8
    • Views: 2,009
    10-10-2016, 07:50 AM Go to last post
  49. Is univariate analysis a must before binary logistic regression

    Could I enter all my independent variables directly for a binary logistic regression OR is it necessary that I should run a one way anova for...

    Started by jm_manipadam‎, 10-21-2016 07:19 PM
    • Replies: 8
    • Views: 1,748
    10-22-2016, 09:27 AM Go to last post
  50. follow up analysis for regression

    I ran 20 services we supply to our customers. I controlled for what seemed obvious things like gender, public support, and severity of disability (we...

    Started by noetsi‎, 05-01-2017 02:34 PM
    • Replies: 8
    • Views: 1,270
    05-02-2017, 12:04 PM Go to last post
  51. Complicated Research quesiton

    Im looking to do some research in the social science field and I have to do a statistical analysis of a complicated set of self report measures. I'd...

    Started by danmpc‎, 12-28-2016 06:52 AM
    • Replies: 8
    • Views: 3,557
    12-30-2016, 12:33 PM Go to last post
  52. Variable change from significant to not significant

    I run a multiple regression with 4 main drivers and some control variables. Then I had to run another regression but with six main drivers (of...

    Started by Jazz3‎, 04-09-2017 09:08 AM
    • Replies: 8
    • Views: 1,803
    05-01-2017, 07:55 AM Go to last post
  53. Variance of a sum of predictions

    Hi, I predict the spatial distribution of a species on a regular grid using a regression model. Species numbers vary with environmental...

    Started by mmercker‎, 03-31-2017 08:03 AM
    population size, prediction interval, spatial analysis
    • Replies: 8
    • Views: 1,404
    04-03-2017, 01:44 AM Go to last post
  54. SPSS is kicking out my variables [regression]

    So I am doing a multiple regression, with some independent variables. For control variables, I created dummies for the years. I have five years...

    Started by Jazz3‎, 03-21-2017 11:38 AM
    • Replies: 8
    • Views: 1,044
    03-24-2017, 10:59 AM Go to last post
  55. I want to learn to create ARX, ARMAX, Box-Jenkins and Output-Error

    Hello. I'm am a control engineer and I want to upgrade my skills in simulation of dynamic physical systems. Normaly I describe my physical system...

    Started by Volvo742‎, 01-06-2017 08:22 AM
    • Replies: 8
    • Views: 3,148
    01-07-2017, 12:43 PM Go to last post
  56. ARIMA estimation technique

    Hello, I am using SAS to forecast with ARIMA. I need to choose between two methods, conditional least Squares and MLE. Which technique do you...

    Started by schteeke1‎, 05-10-2017 07:27 AM
    arima mle cls
    • Replies: 8
    • Views: 2,083
    05-13-2017, 01:03 PM Go to last post
  57. Question Interpretation of Logistic Regression with Python, Pandas & Statsmodel

    Hi guys, I am new to regression analysis and I am trying to figure out how to interpret my results. I basically did a logit regression in Python...

    Started by thenewcat‎, 05-23-2017 04:16 PM
    • Replies: 8
    • Views: 1,328
    05-24-2017, 03:30 PM Go to last post
  58. Lightbulb Log-transforming Only the Dependent Variable

    For the regression: ln(gestation) = 5.28 + 0.0104×Birthweight For the birthweight and gestation data, Minitab tells us that coefficient of...

    Started by hymth‎, 07-03-2017 09:50 PM
    log, log transformation, log-linear
    • Replies: 8
    • Views: 603
    07-06-2017, 03:25 AM Go to last post
  59. Help with analysis. PLEASE.

    Hi all:wave: , please can any one give an indication of which stats test to use. So far I've looked at doing a bivariate and found significant data,...

    Started by georgemac‎, 03-29-2008 07:55 PM
    • Replies: 7
    • Views: 2,662
    03-30-2008, 03:28 PM Go to last post
  60. statistics problem

    I am stumped on how to go about making the test statistic for this problem. Any help would be appreciated. Thank you. Suppose that you would like...

    Started by rambo67‎, 06-11-2008 09:17 PM
    • Replies: 7
    • Views: 4,279
    06-12-2008, 05:56 PM Go to last post

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