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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Exclamation What experimental design would be most appropriate?

    In my study I have two study groups: Group A is composed of X subjects which are either males or females, and every subject is characterized by...

    Started by sylnyapi‎, 11-15-2016 01:18 PM
    • Replies: 0
    • Views: 639
    11-15-2016, 01:18 PM Go to last post
  2. logistic regression or survival analysis?

    Hello, I have two main questions that I hope you help me answer. Let me give you the scenario first. Let’s say that some students in a school are...

    Started by Marvin85‎, 11-14-2016 04:44 PM
    controlling for time, survival analysis, time post
    • Replies: 4
    • Views: 852
    11-15-2016, 10:41 AM Go to last post
  3. Question How to parameterize this crazy data?

    So, a colleague of mine, who is a survey methodologist, is proposing to do an experiment on a survey. * The purpose of the experiment is to see...

    Started by SabbyATL‎, 11-14-2016 07:00 PM
    parameterization
    • Replies: 0
    • Views: 540
    11-14-2016, 07:00 PM Go to last post
  4. Post-Hoc Power Analysis (G*Power) for simple linear regression

    Hey everyone! I conducted a simple linear regression with non-significant results. Now I would like to analyze the power of this calculation using...

    Started by nziza‎, 11-11-2016 07:00 AM
    effect size, g*power, post-hoc, power analysis, simple linear regression
    • Replies: 0
    • Views: 804
    11-11-2016, 07:00 AM Go to last post
  5. Thumbs up Exam pass rate analysis

    Hi, looking for some help with some analysis I am looking at on Minitab for exam pass marks. I have a data set which shows global student...

    Started by iannimmo‎, 11-10-2016 11:38 AM
    • Replies: 1
    • Views: 783
    11-10-2016, 11:47 AM Go to last post
  6. Have 4 dependent and 10 independent variables - which test should I use?

    Hi all, I'm interested in the potential effects of water pollution on feather color of a bird. For this, I calculated 4 color variables for each...

    Started by NatL‎, 11-09-2016 04:47 PM
    dbrda, linear regression, multivariate analysis, permanova, ridge regression
    • Replies: 0
    • Views: 692
    11-09-2016, 04:47 PM Go to last post
  7. please help me make sense of my multilevel linear regression [R]

    Hi everyone, I'm trying to wrap my head around multilevel (or mixed-effect) models, but not quite succeeding. I have the following data from a...

    Started by Junes‎, 11-07-2016 03:46 PM
    multilevel
    • Replies: 0
    • Views: 660
    11-07-2016, 03:46 PM Go to last post
  8. Correlation with residuals of regression

    Hi all, Let's say I have one DV (X) and 5 IV's, A, B, C, D and E. I'm specifically interested in the effect of E. I could perform a regression...

    Started by AnLo‎, 11-04-2016 08:07 AM
    • Replies: 3
    • Views: 716
    11-07-2016, 10:18 AM Go to last post
  9. Red face Test for comparing correlation values. The winner is?

    Hi everyone, my problem is relatively simple, but trivial. I've already read some topics about that, but I really need straightforward answers...

    Started by smndpln‎, 11-05-2016 04:36 AM
    compare coefficients, correlations, neurosciences, regression analysis
    • Replies: 2
    • Views: 659
    11-05-2016, 06:10 AM Go to last post
  10. Urgent: SPSS multiple regression moderator analysis

    Hello everybody, I am glad I found my way to this forum! There seem to be a lot of SPSS pros here! :) I hope I can learn a bit! I am currently...

    Started by PhilST‎, 11-02-2016 12:04 PM
    • Replies: 3
    • Views: 984
    11-03-2016, 03:32 AM Go to last post
  11. Calculating predicted probabilities from a logistic regression model SPSS

    Hello everyone, I am trying to calculate individual predicted probabilities from a logistic regression model with SPSS (to describe how a individual...

    Started by kranas‎, 10-30-2016 12:08 PM
    logistic regression, probabilities
    • Replies: 6
    • Views: 1,549
    11-01-2016, 03:52 PM Go to last post
  12. Calculation of parameter uncertainties when using method of least squares

    Hi everyone, I am struggling with a maybe simple problem. I have a set of data points (x,y) for which I would like to derive a fitting function of...

    Started by bordercollie2‎, 07-29-2016 04:59 AM
    • Replies: 1
    • Views: 774
    11-01-2016, 04:41 AM Go to last post
  13. Multinomial regression: how to interpret results

    Hello Everyone, I'm currently writing my master's dissertation and i'm having two main issues. 1) The first one is related to the attached...

    Started by GiuliaCarbone‎, 10-30-2016 03:41 PM
    • Replies: 4
    • Views: 711
    10-31-2016, 01:57 PM Go to last post
  14. Help with my hierarchal regression

    Hi Guys I'm accomplishing a hierarchal regression for my thesis and I'm a bit stumped. My hierarchal regression is trying to assess the link...

    Started by lewiss009‎, 10-22-2016 09:05 AM
    • Replies: 3
    • Views: 710
    10-30-2016, 01:51 AM Go to last post
  15. bootstrap regression question

    I have a slightly different twist on the normal application of bootstrapping and regression. Here’s the problem… I have a population of people...

    Started by signalMTB‎, 10-19-2016 08:48 PM
    • Replies: 1
    • Views: 756
    10-28-2016, 08:09 AM Go to last post
  16. Relative Weights Analysis | Any good step-by-step guides out there?

    I am trying to conduct relative weights analysis on employee engagement data to prioritize where our org focuses its efforts. I'm running SPSS...

    Started by statsean‎, 10-25-2016 02:03 PM
    relative weights analysis
    • Replies: 0
    • Views: 434
    10-25-2016, 02:03 PM Go to last post
  17. Adding a control increases the impact of focal predictor -- sign of what?

    Hello dear forum members! I have recently been working on a mediation analysis, in which inclusion of an additional variable (say, C1) implies...

    Started by kiton‎, 10-24-2016 10:48 PM
    • Replies: 3
    • Views: 721
    10-25-2016, 10:17 AM Go to last post
  18. How to use Akaike's Information Criterion (AIC) for manual model reduction?

    Hi all, I wondered if anybody can explain to me how I can use the AIC for manual reduction of my GLM. I calculate a GLM with the following...

    Started by Fred.‎, 10-24-2016 06:52 AM
    • Replies: 1
    • Views: 848
    10-24-2016, 10:58 PM Go to last post
  19. Cross-sectional dependence, heteroskedasticity and serial correlation

    *** solved

    Started by Wooly‎, 10-24-2016 02:51 PM
    cross-sectional, econometrics
    • Replies: 0
    • Views: 396
    10-24-2016, 02:51 PM Go to last post
  20. Basic Estimation; Should I use future data?

    Hi everyone, I'm new on the forum but had a question to ask that's related to the work I currently do. I'm wondering if we should include...

    Started by Edorian‎, 10-04-2016 06:54 PM
    • Replies: 4
    • Views: 681
    10-23-2016, 10:24 PM Go to last post
  21. Comparison of one outcome to all the other outcomes

    Here is some data to play with set.seed(1e4) color = factor(c(rep("blue",20), rep("red",20), rep("yellow",150)),...

    Started by Remi‎, 10-23-2016 06:58 PM
    categorical vairable, hypothesis testing, logistic regression, mcmcglmm
    • Replies: 0
    • Views: 315
    10-23-2016, 06:58 PM Go to last post
  22. What p value to use for purposeful selection of variables for multivariate

    To do purposeful selection of variables for multivariate, can I use a p value of 0.15 cut off to select those significant variables from univariate ...

    Started by jm_manipadam‎, 10-23-2016 12:27 PM
    • Replies: 1
    • Views: 610
    10-23-2016, 01:28 PM Go to last post
  23. 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: 579
    10-22-2016, 09:27 AM Go to last post
  24. How to handle non normally distributed residuals

    Currently we are working with a GEE model, at this point we are having doubts about our residuals which are not normally distributed. Log...

    Started by Cintia‎, 10-21-2016 09:58 AM
    • Replies: 0
    • Views: 582
    10-21-2016, 09:58 AM Go to last post
  25. Post Help with regression and related nominal values

    Hey all. I'd like some input on a regression analysis. I have data that measures the reactions of individuals to a number of objects and to a number...

    Started by infiniteline‎, 10-15-2016 12:35 PM
    multivariate, nominal variable, regression analysis
    • Replies: 5
    • Views: 505
    10-20-2016, 10:25 AM Go to last post
  26. GLM on non-linear/curvilinear data

    Dear all! I’m sure somebody of you will help me with my non-linear data-problem. I measured a fitness correlate of an animal (response variable)...

    Started by Fred.‎, 09-30-2016 08:54 AM
    anova
    • Replies: 6
    • Views: 732
    10-19-2016, 07:54 AM Go to last post
  27. Defining relation of a fold over design

    Dear All, I am reading the book DC Montgomery on my own. The book says that the defining relation for a foldover design will have L + U - 1 words...

    Started by ashimkapoor‎, 10-18-2016 01:50 PM
    doe
    • Replies: 0
    • Views: 370
    10-18-2016, 01:50 PM Go to last post
  28. Heteroscedastcty with large number of cases

    I ignore here that I have populations commonly :p I have heard that heteroscedastcity is not an issue when you have large sample sizes (I have ten...

    Started by noetsi‎, 10-14-2016 10:45 AM
    • Replies: 10
    • Views: 807
    10-17-2016, 01:21 PM Go to last post
  29. Multiple Regression study

    delete this

    Started by Giaco‎, 10-17-2016 02:52 AM
    • Replies: 0
    • Views: 387
    10-17-2016, 02:52 AM Go to last post
  30. Multicollinearity problem in binary logistic regression

    I'd like to ask for some help with a binary logistic regression. In SPSS I am trying to build a binary logistic regression with 4 independent...

    Started by kranas‎, 10-15-2016 05:20 AM
    logistic regression, multicollinearity
    • Replies: 2
    • Views: 554
    10-16-2016, 01:52 AM Go to last post
  31. Please Help Weird Question

    I have a very weird question which I guess is not replicated hopefully I can get an answer. when using the multiple regression analysis in excel via...

    Started by naderkamal188‎, 10-15-2016 06:35 PM
    • Replies: 1
    • Views: 396
    10-15-2016, 09:42 PM Go to last post
  32. 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: 1,167
    10-15-2016, 10:50 AM Go to last post
  33. Many predictors relative to cases, want to identify interesting ones

    I've been helping a colleague with his research project. He is looking at the trustworthiness of profile texts. He is analyzing text entries using...

    Started by Junes‎, 10-13-2016 06:49 PM
    exploratory, lasso, linear regression, predictors, stepwise regression
    • Replies: 2
    • Views: 389
    10-14-2016, 02:31 PM Go to last post
  34. Interaction Terms in Linear regression

    In R I used the linear regression call for three variables: y, x, and c Y and X are numeric where C is a dichotomous {0,1}. X and C are the...

    Started by Z-Statistic‎, 10-12-2016 05:49 PM
    • Replies: 1
    • Views: 390
    10-12-2016, 08:48 PM Go to last post
  35. Linear Regression coeffiecients used in Exponential Regression

    I have a decay curve (y) with values 1, 0.75,0.64,0.54,0.46. The x values are 1,2,3,4,5. First a simple linear regression was performed (y =mx + b)....

    Started by Haripi314‎, 10-12-2016 11:36 AM
    exponential regression, linear regression
    • Replies: 0
    • Views: 398
    10-12-2016, 11:36 AM Go to last post
  36. Controlling for a variable in multiple regression creates significance of another var

    I have continuous variables A, B and C. A/B correlates with C significantly. Neither A, B or A*B correlates significantly with C. In multiple...

    Started by trexter‎, 10-12-2016 03:56 AM
    • Replies: 1
    • Views: 365
    10-12-2016, 08:12 AM Go to last post
  37. Static & Dynamic variables in one model

    Hello! My name is Valentina and I am a Master student, currently working on my MSc thesis. I am examining the effect of Politicians on the board...

    Started by monicanic‎, 10-12-2016 03:03 AM
    • Replies: 0
    • Views: 378
    10-12-2016, 03:03 AM Go to last post
  38. Multivariate ''binary'' logistic regression...???

    Hello all, My name is Nick. I am a doctor and i would appreciate any of your help in the above problem. Recently, on purpose to delineate/propose a...

    Started by nok‎, 10-11-2016 12:33 PM
    • Replies: 3
    • Views: 520
    10-11-2016, 01:55 PM Go to last post
  39. Regression Lines

    Can someone please explain this to me In a random sample of 40 students, the mean number of hours spent studying is 7.5 with a standard deviation...

    Started by Ahmed.abdullah‎, 10-11-2016 11:36 AM
    • Replies: 1
    • Views: 344
    10-11-2016, 11:48 AM Go to last post
  40. Country Variable

    Hi Stata Experts, I have a question concerning an idea for my thesis. I have firm-specific data (assets, sales, income etc.) for different firms...

    Started by corazon92‎, 10-11-2016 08:27 AM
    • Replies: 0
    • Views: 353
    10-11-2016, 08:27 AM Go to last post
  41. Regression after multiple imputation

    Hello every one. I want to perform simple binary logistic regression after multiple imputation but I constantly get this message and the execution of...

    Started by johnstatistic‎, 10-05-2016 09:32 PM
    multiple imputations, regression analysis
    • Replies: 5
    • Views: 590
    10-10-2016, 07:45 PM Go to last post
  42. Cool Approximating the probability of an event occuring from the output of a Poisson GLM

    Hi all, I have some data that includes the output of a Poisson Log Link model, that aims to predict how many times an event will occur over the...

    Started by skinicod‎, 10-08-2016 09:47 AM
    glm, log link, poisson
    • Replies: 2
    • Views: 522
    10-10-2016, 11:15 AM Go to last post
  43. Spearman's Correlation and Wilcoxon Signed Rank Test

    Hey guys! I have an urgent question for my master thesis. In my thesis, I'm comparing 4 performance metrics. My data consists of 100 funds and...

    Started by leomessi178‎, 10-10-2016 11:13 AM
    • Replies: 0
    • Views: 478
    10-10-2016, 11:13 AM Go to last post
  44. 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: 654
    10-10-2016, 07:50 AM Go to last post
  45. OLS Regression w/ longitudinal data

    I have a longitudinal data set with two waves. Several variables exist in both waves. I want to examine the following question with and OLS...

    Started by ReneRopac‎, 10-07-2016 03:33 PM
    • Replies: 0
    • Views: 433
    10-07-2016, 03:33 PM Go to last post
  46. Postive correlation but negative coefficient in regression??

    Im a little confused by some results I have..... I have two predictor variables and an outcome variable. The first predictor is positively...

    Started by statto‎, 08-20-2011 09:39 AM
    2 Pages
    1 2
    rho/beta conflict, suppression
    • Replies: 23
    • Views: 43,475
    10-07-2016, 04:31 AM Go to last post
  47. Exclamation Stationary data first after the 2-order/3-order difference on LN(variable)

    I want to make an Linear Regression. Dependent variable: GDP Independent variables: Net exports and Debt and some control variables All variables...

    Started by APA‎, 10-06-2016 08:33 AM
    differencing, linear regression, non-stationarity, ols, stationarity
    • Replies: 0
    • Views: 943
    10-06-2016, 08:33 AM Go to last post
  48. What information can we get from the table of deviance residual (regression)?

    Hello, I was wondering what's the importance and substantive interpretation of the table of deviance residual in the context of (logistic)...

    Started by gianmarco‎, 10-05-2016 09:01 AM
    • Replies: 0
    • Views: 319
    10-05-2016, 09:01 AM Go to last post
  49. help me wid this question

    hi everyone i want the solution of this question before sunday i will post the regression table here just help me in answering the questions

    Started by softy‎, 10-01-2016 12:31 AM
    • Replies: 3
    • Views: 1,186
    10-04-2016, 11:29 PM Go to last post
  50. Question Large odds ratio in binary logistic regression/big scale difference of variables

    I'd like to ask for some help with a binary logistic regression. In SPSS I am building a binary logistic regression with 4 independent continuous...

    Started by kranas‎, 10-01-2016 11:29 AM
    logistic regression, odds ratio
    • Replies: 3
    • Views: 508
    10-02-2016, 05:53 AM Go to last post
  51. calculation of the average leverage when predictor(s) is categorical

    Hello, I was reading different resources about regression diagnostic, in particular for Logistic Regression. As for leverage, the sources suggest...

    Started by gianmarco‎, 09-30-2016 02:57 AM
    • Replies: 3
    • Views: 404
    09-30-2016, 02:41 PM Go to last post
  52. Poisson regression for Count data

    Hello Every one, I'am working in Toxicological lab, Where we deal with animal data. I have to perform Poisson Regression for count data but i...

    Started by umang49‎, 09-27-2016 11:59 AM
    • Replies: 9
    • Views: 1,036
    09-28-2016, 06:38 PM Go to last post
  53. Correlation VS linear regression using proportional data

    Hi, I was hoping someone may be able to assist. I have discussed this with two people who understand a great deal about stats, although I read...

    Started by jonpaul31‎, 09-28-2016 11:52 AM
    • Replies: 0
    • Views: 912
    09-28-2016, 11:52 AM Go to last post
  54. Dealing with missing values

    I am analyzing the data of a cohort study.There are three sets of paired data (same measures on same subjects in 3 different point of time). The...

    Started by johnstatistic‎, 09-23-2016 08:54 AM
    missing values, regression model
    • Replies: 2
    • Views: 493
    09-27-2016, 06:54 AM Go to last post
  55. Not significant coefficients in Logit, but in Probit they are

    Hello, I would like to ask you for a help. I have a simple model with one explanatory variable and with a binary dependend variable. Explanatory...

    Started by tradermartin‎, 09-24-2016 02:48 AM
    • Replies: 5
    • Views: 816
    09-26-2016, 05:40 PM Go to last post
  56. Generalized Least Squares (and ANOVA type III)

    Dear all, I ran a type III ANOVA on a model of this kind: gls(y~x1+x2+x3). I found that both x2 and x3 are significant. However, if I drop x3 from...

    Started by sff.cardoso‎, 09-21-2016 02:07 PM
    anova, gls, regression analysis
    • Replies: 5
    • Views: 458
    09-22-2016, 01:07 PM Go to last post
  57. Eviews 9 Tutorial Fixed Effects And Random Effects Two Stage Least Squares

    https://www.youtube.com/watch?v=M8OuLQYHDrM Fixed Effects And Random Effects Two Stage Least Squares (2SLS) regression analysis is a statistical...

    Started by OlhDt_semarang‎, 09-18-2016 11:44 PM
    • Replies: 0
    • Views: 546
    09-18-2016, 11:44 PM Go to last post
  58. Time series or not?

    I am working with three series of 33 yearly observations each. My goal is to understand causality and the long run relationships between them; one of...

    Started by verylost‎, 09-17-2016 06:50 AM
    • Replies: 3
    • Views: 1,087
    09-17-2016, 12:10 PM Go to last post
  59. Exclamation Multivariate models - standard error help

    I have 2 multivariate models created in R concerning nutrition Model 1 = -11.5±1.68 + 0.56±0.562 Intake + 16.6±0.165 Potassium concentration ...

    Started by Ireeland‎, 09-16-2016 06:14 AM
    model, multivariate, standard error
    • Replies: 0
    • Views: 385
    09-16-2016, 06:14 AM Go to last post
  60. Logistic Regression of Weekly NFL Data

    This guy uses a type of regression to predict NFL games: http://trevorbischoff.com/amos-2016-nfl-predictor/

    Started by LeeBalto‎, 09-14-2016 06:46 AM
    regression
    • Replies: 1
    • Views: 509
    09-14-2016, 09:38 AM Go to last post

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