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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. How to regress data

    Hi, I would like to do a simple regression one variable on a dependent variable. Specifically, I would like to regress a financial ratio such as ROE...

    Started by StatisticsNewbie12‎, 08-27-2015 12:59 PM
    • Replies: 0
    • Views: 982
    08-27-2015, 12:59 PM Go to last post
  2. Regression analysis for the influence one result has on the results of another test

    Hi There, My name is Jordan and Iím a physiotherapist working in London. I have taken over study from a colleague and have been given the data...

    Started by jordanwb‎, 08-27-2015 08:15 AM
    • Replies: 0
    • Views: 535
    08-27-2015, 08:15 AM Go to last post
  3. Mediation Analysis With Longitudinal/Multilevel Data

    Hi All, I'm trying to determine if it's possible to conduct mediation analysis on three-level data. I have data with repeated measures at five...

    Started by Colonel‎, 08-26-2015 09:05 PM
    • Replies: 0
    • Views: 1,544
    08-26-2015, 09:05 PM Go to last post
  4. Setting an experiment with ordered categories as predictors

    I am trying to apply a multi-factorial regression analyses on a model with 4 different predictors each of which can have four different weights as...

    Started by Ines77‎, 08-26-2015 03:16 PM
    categorical predictors, categorical variables, regression analysis
    • Replies: 1
    • Views: 831
    08-26-2015, 03:52 PM Go to last post
  5. Is GLM to best for my data

    Hello I want to look at abundance of fleas on their hosts, so there are zero counts. I have looked and found that GLM with family = poisson and...

    Started by Pippy34‎, 08-26-2015 01:01 AM
    • Replies: 2
    • Views: 1,006
    08-26-2015, 01:48 PM Go to last post
  6. Regressional on likert scale data using spss

    Hi guys, I am in a fix!!:confused:. My questionnaires have recently been filled but am yet to figure out how to analyze my data. My topic is "impact...

    Started by thega‎, 04-04-2011 06:59 AM
    • Replies: 2
    • Views: 6,407
    08-26-2015, 08:56 AM Go to last post
  7. Alternative for a multi-level analysis

    Hi all, For my criminology thesis I am analysing police interviews and would like to research the effect (the presence of) an attorney has on...

    Started by Aeleanor‎, 08-25-2015 08:15 AM
    analysis, logistic, multi-level, nested, regression
    • Replies: 1
    • Views: 952
    08-25-2015, 10:13 AM Go to last post
  8. Interpreting my regression results

    Hi all, i'm running a panel regression using stata. i wanted to test whether there are indeed region fixed effects (FE) that reside in my data...

    Started by proby2‎, 08-23-2015 04:05 PM
    • Replies: 0
    • Views: 729
    08-23-2015, 04:05 PM Go to last post
  9. Exclamation Multiple Regression: 3 levels in IV of interest, how to compare between all 3?

    Hi all, I would like to test the following and am hoping to get some assistance as I am new to regression: DV - Brain volume IV - Participant...

    Started by michikoc‎, 08-22-2015 11:52 PM
    ancova, multiple regression, regression
    • Replies: 0
    • Views: 736
    08-22-2015, 11:52 PM Go to last post
  10. Fixed effect Model

    dear all, I am having problems with the fixed effect model. In a nutshell, I am analysing the impact of disasters within families with regard...

    Started by Heike C.‎, 08-22-2015 08:08 AM
    • Replies: 0
    • Views: 839
    08-22-2015, 08:08 AM Go to last post
  11. Hierarchical regression for a complex model

    So I am testing my own model but it is more complex than I have dealt with before. I know I need hierarchical regression, and I'm using SPSS (I have...

    Started by cp349‎, 08-21-2015 03:45 PM
    hierarchical, mediators, model, moderators, regression
    • Replies: 0
    • Views: 625
    08-21-2015, 03:45 PM Go to last post
  12. Regression to the mean for discrete non normal data

    Hello At work an initiative was started that attempted to reduce the number of Emergency department attendances by frequent users. I have a set...

    Started by MrScotchpie‎, 08-21-2015 07:59 AM
    • Replies: 1
    • Views: 828
    08-21-2015, 02:09 PM Go to last post
  13. Logistic Regression

    Hello, I'm currently working on a churn modelling exercise that uses logistic regression. The challenge that i'm facing now is that the model is...

    Started by JustinG‎, 08-20-2015 03:34 AM
    churn, logistic regression, predictive analysis, sample
    • Replies: 2
    • Views: 874
    08-21-2015, 04:11 AM Go to last post
  14. Variation of Gauss - Markov theorem

    Hi all, I was wondering what happens to the proof and the results of the Gauss - Markov theorem, if one hypothesis is changed and so if the...

    Started by StatsFX‎, 08-19-2015 10:13 AM
    • Replies: 0
    • Views: 654
    08-19-2015, 10:13 AM Go to last post
  15. Logistic Regression

    Hello I am going to start building a Logistic Regression model based on medical data for the purpose of classification. My problem started with...

    Started by osamastat‎, 08-15-2015 05:44 AM
    • Replies: 4
    • Views: 1,495
    08-16-2015, 01:37 PM Go to last post
  16. Confounder

    What if I see a 10% change (decrease) in an variable effect (X1 on Y) when including another variable (X2), though the effect of X1 is never remotely...

    Started by hlsmith‎, 08-13-2015 04:12 PM
    • Replies: 3
    • Views: 1,045
    08-16-2015, 11:16 AM Go to last post
  17. Can I draw an interaction plot using Generalised Estimating Equations (GEE)?

    Hello, Can I draw an interaction plot using Generalised Estimating Equations (GEE)? If yes, how? Thanks.

    Started by Paulius‎, 08-16-2015 09:42 AM
    regresion analysis, statistics
    • Replies: 0
    • Views: 503
    08-16-2015, 09:42 AM Go to last post
  18. Difference-in-difference regression

    Hello, I have a problem with my current research project and I am not very experienced with statistics so it would be great to find some help...

    Started by ERa‎, 08-16-2015 01:46 AM
    difference in difference, difference-in-difference, ols, ols regression, regression
    • Replies: 0
    • Views: 782
    08-16-2015, 01:46 AM Go to last post
  19. Best way to code a variable in a hierarchical (multi-level) regression?

    The outcome is binary, and I have individual-level data and geographical-level data. It's the latter I need help with. Here's the best example:...

    Started by oncearunner‎, 08-13-2015 08:38 PM
    • Replies: 1
    • Views: 797
    08-13-2015, 09:54 PM Go to last post
  20. Logistic Regression: collinearity btw continuous and categorical predictors?

    Hi All, I am still working on fitting a binary Logistic Regression model in which the DV is land 'optimal vs. non-optimal quality', and the IVs are...

    Started by gianmarco‎, 08-12-2015 05:22 AM
    • Replies: 7
    • Views: 1,404
    08-12-2015, 07:21 AM Go to last post
  21. Which model would you choose?

    Dear readers, I am struggeling with the model selection (ICs are very different and many insignificant models). Which model would you choose, and...

    Started by martijn9000‎, 08-12-2015 06:17 AM
    aic bic, model selection
    • Replies: 1
    • Views: 761
    08-12-2015, 06:35 AM Go to last post
  22. How to handle missing values in lm.fit?

    Is there a way to use lm.fit without completely removing rows with missing data using R? Is there a way for lm.fit to leave out one piece of...

    Started by RM1004‎, 08-10-2015 10:36 AM
    missing data, regression model
    • Replies: 1
    • Views: 857
    08-10-2015, 03:33 PM Go to last post
  23. Help with regression model

    Hi, I am trying to understand whether there are any problems with a regression model I'm using for research. I'm interested in the effect of...

    Started by oracle133‎, 08-10-2015 10:11 AM
    • Replies: 0
    • Views: 581
    08-10-2015, 10:11 AM Go to last post
  24. Polynomial Regression

    Is there anyway to get this formula in the polar opposite where X = Expression? I am hoping to get this so that I can use it to help do a...

    Started by mrmmickle1‎, 08-06-2015 10:42 PM
    • Replies: 0
    • Views: 1,084
    08-06-2015, 10:42 PM Go to last post
  25. Best Way to Format an Excel Data Sheet for export to R.

    Hi. I am conducting a multiple linear regression using Panel data for my finance honours research project. I have collected data for 100 stocks...

    Started by DCKALE002‎, 08-06-2015 08:10 AM
    • Replies: 0
    • Views: 755
    08-06-2015, 08:10 AM Go to last post
  26. Comparing linear regression models: a chi-squared test to compare adjusted R-squares?

    Hi all, I used linear regression to analyze the data of one of my experiments, and used 3 predictors in a first model, added 4 more predictors in...

    Started by Maayke‎, 08-05-2015 06:43 AM
    • Replies: 1
    • Views: 944
    08-06-2015, 03:04 AM Go to last post
  27. Experiment Design Help please

    Hi All I have used a Central Composite Design (CCD) for my experiments, where I have three Factors (A, B, c) and each Factor has five values. I have...

    Started by Dlair‎, 06-21-2015 08:16 AM
    • Replies: 2
    • Views: 1,158
    08-04-2015, 05:15 PM Go to last post
  28. p-value of a coefficient from a regression

    The t-stat value follows a two-tail symmetric t-distribution with mean and median of zero? Am I correct so far? If so, then how can you get a...

    Started by oahz‎, 08-04-2015 10:03 AM
    • Replies: 9
    • Views: 1,479
    08-04-2015, 04:54 PM Go to last post
  29. Probit Regression

    Hİ all. Hope everyone is great. I just want to ask a question. What are the assumptions of probit regression? Can you offer me a book about probit...

    Started by chivasrom‎, 08-04-2015 02:33 AM
    • Replies: 1
    • Views: 812
    08-04-2015, 03:39 AM Go to last post
  30. Impact of heteroscedasticity and non-normality on utility of regression result?

    Hello: I am using least squares 2nd order polynomial regression to determine the effect of a single independent variable (X) on a dependent...

    Started by Joost‎, 08-01-2015 07:45 PM
    • Replies: 0
    • Views: 696
    08-01-2015, 07:45 PM Go to last post
  31. What if you are not interested in a variable that has been found to matter in the lit

    The article I am working for stresses the importance of a variable that my organization has no interest in at all. It is an important control, should...

    Started by noetsi‎, 07-31-2015 01:03 PM
    • Replies: 4
    • Views: 1,026
    08-01-2015, 03:28 AM Go to last post
  32. SPSS Logistic Regression Predicts Too Many Negatives?

    Hello everybody, I have a logistic regression model, where the outcome Yes is coded as 1, No as 0. The split between Yes and No is about 30/70...

    Started by pd1598‎, 07-31-2015 10:41 AM
    • Replies: 6
    • Views: 1,093
    08-01-2015, 02:28 AM Go to last post
  33. New to hierarchical regression, looking for advice

    Hey all, I am relatively experienced in plain old OLS and I'm trying to learn how to do mixed-effects, hierarchical modeling. I got Andrew...

    Started by sasin‎, 07-31-2015 06:57 PM
    • Replies: 0
    • Views: 626
    07-31-2015, 06:57 PM Go to last post
  34. What is "mixed-effects OLS regression"

    It is mentioned on p 14 of the link below. I have never heard of it before... ...

    Started by noetsi‎, 07-31-2015 12:58 PM
    • Replies: 3
    • Views: 870
    07-31-2015, 06:21 PM Go to last post
  35. 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: 1,114
    07-31-2015, 09:22 AM Go to last post
  36. Linear Reg (Press Statistic)

    I was not familiar with the Press Statistic. I am currently looking it up. Seems to be a leave-one-out procedure. Can any one provide some...

    Started by hlsmith‎, 07-30-2015 07:43 AM
    • Replies: 2
    • Views: 903
    07-30-2015, 08:06 AM Go to last post
  37. Relationship between 2 variables & 1 dependant

    Hi all, My wife is busy with an assignment that is even giving me grey hair. She needs to determine the relationships between 2 variables and 1...

    Started by kiepie‎, 07-28-2015 12:40 PM
    • Replies: 7
    • Views: 850
    07-30-2015, 07:45 AM Go to last post
  38. Can someone please please please help me on these homework questions?

    Hello everyone! Im a stats student that is having some difficulty on my homework. I have attached the questions (7) in a picture below. If you could...

    Started by statsstudent1‎, 07-30-2015 02:01 AM
    • Replies: 1
    • Views: 828
    07-30-2015, 05:25 AM Go to last post
  39. Moderating effects in structural equation models

    Hello, first, I want to apologize if I'm opening this thread in the wrong folder etc. I just registered here and I'm a bit confused still. I'm...

    Started by PSH‎, 07-30-2015 03:37 AM
    moderation, moderator, regression, sem
    • Replies: 0
    • Views: 704
    07-30-2015, 03:37 AM Go to last post
  40. Linear Regression with effect size changes of categorical variables with continuous

    I have three categorical variables (disked, herbicide, Lands) each is binomial (0,1). For example, within disked there is a group in which it does...

    Started by farre1pd‎, 07-27-2015 12:45 PM
    ancova, categorical, continuous, group differences
    • Replies: 3
    • Views: 903
    07-27-2015, 02:21 PM Go to last post
  41. 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: 962
    07-27-2015, 08:32 AM Go to last post
  42. Ordinal predictor variable in regression

    When you have a nominal categorical predictor you just create dummies. With say a five level ordinal predictor (the classical case would be a likert...

    Started by noetsi‎, 07-26-2015 03:11 PM
    • Replies: 1
    • Views: 893
    07-26-2015, 05:51 PM Go to last post
  43. Correcting for endogeneity a panel count model with interactions using IV approach

    Hello dear forum members, My study examines the impact of online (a) reputational status, and (b) reviews on physicians’ performance, as proxied...

    Started by kiton‎, 07-25-2015 09:52 AM
    endogeneity, instrumental variables, interaction terms, panel count model
    • Replies: 0
    • Views: 803
    07-25-2015, 09:52 AM Go to last post
  44. 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: 1,687
    07-25-2015, 06:13 AM Go to last post
  45. Logistic Regression: how can I handle IVs which are correlated?

    Hello, I am planning to fit a Logistic Regression model (binary) and I would like to use (among several IVs) 4 predictors that turn out to suffer of...

    Started by gianmarco‎, 07-24-2015 02:19 AM
    • Replies: 7
    • Views: 1,015
    07-24-2015, 09:26 AM Go to last post
  46. Concerns with using a mix of Continuous and Categorical IVs in Logistic Regression?

    Before I get into it, I want to make clear that I'm not a statistics guy. I'm doing what I can to get through a thesis and stumbling my way forward....

    Started by OkieSpladle‎, 07-22-2015 12:33 PM
    • Replies: 7
    • Views: 982
    07-23-2015, 12:30 PM Go to last post
  47. Comparing probability scores from logistic models

    Hi, I want to be able to compare the probability scores from 2 different logistic regression models. I think it is not appropriate to directly...

    Started by msaifk‎, 07-22-2015 11:27 PM
    • Replies: 1
    • Views: 788
    07-23-2015, 07:08 AM Go to last post
  48. Linear regression alayses with interaction effect of two categorical variables

    Dear all, I have to run a linear regression analysis in SPSS with an interaction effect of two categorical variables: - Modality (audio,...

    Started by nadinv‎, 07-22-2015 04:12 PM
    regression
    • Replies: 3
    • Views: 970
    07-23-2015, 04:35 AM Go to last post
  49. Interaction between a time-varying and a time invariant variable? (Panel regression)

    Hi everyone, I have got a question regarding the specification of interaction effects in panel regressions (fixed effects within estimators). I...

    Started by numerator‎, 07-22-2015 07:44 AM
    interaction, moderation, panel, regression, time invariant
    • Replies: 1
    • Views: 1,502
    07-22-2015, 08:26 AM Go to last post
  50. Using residuals as predictors to adjust for effects of covariate in regression

    I was wondering if this is appropriate: I have two predictors that are highly correlated and collinear, x1 and x2, and are both associated with Y....

    Started by Disvengeance‎, 07-21-2015 02:14 PM
    • Replies: 4
    • Views: 1,393
    07-21-2015, 03:50 PM Go to last post
  51. Panel probit model (RE) -- inclusion of time invariant variables

    Hello forum members! Consider a panel probit model to be estimated (say, in Stata code): -xtprobit y x1 x2 x3 x4, re- where, y is binary...

    Started by kiton‎, 07-20-2015 06:07 PM
    • Replies: 0
    • Views: 736
    07-20-2015, 06:07 PM Go to last post
  52. Principal Component Analysis - global R2

    Hi, I've extracted the principal components from a set of k studentized variables. I can compute the cumulative R2.i.e the percentage of...

    Started by vm294‎, 07-20-2015 04:53 AM
    pca
    • Replies: 1
    • Views: 695
    07-20-2015, 10:49 AM Go to last post
  53. Reviewer questioning my regression in my article, need advice on how/what to respond

    Hi guys. Iíve submitted my first article and a reviewer is questioning my stats. I never had this problem before and I need your help! Quick...

    Started by nightale‎, 07-16-2015 03:57 PM
    • Replies: 13
    • Views: 1,303
    07-20-2015, 10:46 AM Go to last post
  54. Selecting Variables in Regression Analysis

    Hello, I am working on generating a regression analysis, but I am not sure if my setup is accurate. I would like to predict how long it will take...

    Started by mjgarrin‎, 07-17-2015 01:57 PM
    • Replies: 3
    • Views: 1,291
    07-20-2015, 07:55 AM Go to last post
  55. (SPSS) Linear Mixed Model?

    Dear all, I would appreciate any advice on the correct use of a Linear Mixed Model (in SPSS) A short description of the research Iím doing: In...

    Started by JdH‎, 07-18-2015 07:27 AM
    • Replies: 0
    • Views: 892
    07-18-2015, 07:27 AM Go to last post
  56. Finding Significant Difference between Linear Regressions

    Hello. I have a scatterplot with two different sets of data plotted. Each individual set has its own linear regression formula and R-squared...

    Started by danhageman‎, 07-16-2015 11:31 PM
    outlier detection, p-value, regression analysis, scatter plot, significance
    • Replies: 0
    • Views: 637
    07-16-2015, 11:31 PM Go to last post
  57. Exclamation How to use Likert Scale data in regression analysis?

    My knowledge about statistics is elementary and I would really appreciate some help or suggestions in solving my current problem. I am doing a...

    Started by irtiza104‎, 07-14-2015 03:40 PM
    • Replies: 9
    • Views: 2,586
    07-16-2015, 07:57 PM Go to last post
  58. Simple question : Understanding an interaction - Gender as a moderator

    I wanted to see if gender has a moderating effect on the interaction between the age at divorce and trust in relationships. I centered the age at...

    Started by Charlotte_‎, 07-12-2015 04:01 AM
    • Replies: 3
    • Views: 938
    07-15-2015, 03:57 PM Go to last post
  59. 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: 1,134
    07-15-2015, 03:37 PM Go to last post
  60. Simple question - regression, order effects, experiment

    Hi there, I did a simple experiment whereby people in counterbalanced order received a measurement scale measuring their emotions and then...

    Started by Portland‎, 07-08-2015 01:52 PM
    • Replies: 2
    • Views: 1,203
    07-10-2015, 07:42 AM Go to last post

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