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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Regression Possibility?

I've got some real data (from a real experiment), and I'm having trouble finding a way to carry out a regression. The independent variable is...

• Replies: 2
• Views: 2,194
BGM
03-04-2011, 04:03 AM
2. ### Unique vs. Shared Variance Multiple Regression

Hi all, I am having trouble with interpreting the explained variance of my multiple regression model. I ran a hierarchical model with nine...

• Replies: 1
• Views: 1,291
03-31-2017, 06:41 PM
3. ### Process Model and Covariates

Hi all, I am having difficulty with Andrew Hayes' Process tool and my mediation model. Is it acceptable to run a mediation analysis with a...

• Replies: 6
• Views: 2,097
03-05-2017, 02:59 PM
4. ### Expert Help Required - Multiple Regression with Nominal and Scale Variables

Hi all, I'm having huge issues with the assumptions of multiple regression and determining whether I am running my analysis correctly. First of...

• Replies: 4
• Views: 2,069
02-27-2017, 01:25 PM
5. ### Reporting Dummy Variables and Determining Significance

Hi all, I was just wondering, how does a person determine the significance of a categorical variable in a hierarchical regression model if one...

• Replies: 1
• Views: 394
06-27-2017, 12:46 PM
6. ### 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...

• Replies: 1
• Views: 1,489
08-25-2015, 10:13 AM
7. ### quick question

Can someone tell me the difference between Model I and Model II regression? I have some data that I'd like to plot in JMP but I'm not sure which...

• Replies: 0
• Views: 2,871
11-09-2010, 04:43 AM
8. ### Problem with results in ordinal regression...

Hello and thanks in advance for any response... I have 60 likert-type questions (5 items) (and their responses of course...) and age. Age as raw...

• Replies: 3
• Views: 1,079
05-22-2017, 08:44 PM
9. ### Surface Response Metodolgy: What model should i use for a 2 factor design

I made a SRM for a chemistry experiment. The factors analyzed were 2 an i had 5 responses. For the model can i use a cubic model or should i use a...

• Replies: 0
• Views: 2,215
07-11-2011, 02:11 PM
10. ### External validation of a log reg model using Nagelkerkes R2 w/ fixed parameters

I have a dataset containing a point score (an integer between 0-41) and mortality (0/1) for a sample. I have performed a logistic regression...

• Replies: 0
• Views: 382
03-30-2017, 08:05 AM
11. ### Standard errors in IV and 2SLS

Hi guys, I'm running an instrumental variable regression and the same two stage least squares regression in R. I get the same coefficient...

• Replies: 1
• Views: 3,597
05-21-2011, 06:47 AM
12. ### Rescaling Variables

hi guys, I'm trying to rescale variables so that I don't get such small coefficients. How should I go about this? Multiply independent by a...

• Replies: 1
• Views: 3,376
05-29-2011, 07:01 PM
13. ### Model fit vs. Prediction

When it comes to regression, a lot of people are obsessed (as they should be) with how well a model fits. But what about how well the model can...

• Replies: 6
• Views: 2,826
01-18-2013, 04:53 PM
14. ### Repeated measures, random effects, or both?

Hi, I have the following situation and I do not know if it is a case that calls for repeated measures or individual-specific random effects. We...

• Replies: 6
• Views: 1,139
agp
05-18-2016, 08:08 AM
15. ### Normality assumption for Regression

I have an outcome variable that is composed of one item on a 3 point scale to assess participation (none-1, member of 1 program-2, member of both...

• Replies: 6
• Views: 2,059
02-05-2013, 04:04 PM
16. ### Control variable correlated with binary treatment variable

This question regards a social program evaluation which involves participants receiving a binary treatment that they self-select into. Some of these...

• Replies: 0
• Views: 2,002
12-24-2011, 12:16 AM
17. ### Log-linear model with negative values

I would like to estimate a log-linear model which contains negative values in the dependant variable. The only advice I've seen is to add a constant...

• Replies: 0
• Views: 1,105
11-09-2013, 02:57 AM
18. ### what method to use for modeling flue motality rate

Here is the flu mortality graph from CDC. http://www.cdc.gov/flu/weekly/weeklyarchives2010-2011/images/picurve22.gif Mortality rate(red line) is...

• Replies: 1
• Views: 2,561
06-12-2011, 09:32 PM
19. ### GJR GARCH in Stata

Hello, I am doing a research paper on finding the asymmetric volatility 14 stock indexes from around the world, and for this I am using EGARCH...

• Replies: 0
• Views: 3,300
08-28-2012, 12:36 AM
20. ### 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...

• Replies: 1
• Views: 1,004
10-11-2016, 11:48 AM
21. ### Logistic regression- categories

I am very new into Spss and spent a few hours to understand logistic regression. :shakehead I could not understand the relationship between 0...

• Replies: 2
• Views: 1,848
06-04-2014, 05:48 AM
22. ### How to Handle Blank Fields in Multiple Linear Regression

I am building a regression with 45 samples across 20+ independent variables. I am randomly selecting subsets of the variables and running many...

• Replies: 2
• Views: 1,311
07-02-2015, 01:32 PM
23. ### Multiple Linear Regression in Environmental Justice Analysis

Hi, I have 982 data points (census block groups) for which I have information on % minority and low income, and levels of air pollution. I did MLR...

• Replies: 3
• Views: 3,115
08-18-2011, 04:50 PM
24. ### Aggregating or Pooling Multinomial Logistic Regression Coefficients

I'm trying to recreate the MNL analysis like this paper or this one. In Excel I have a sheet with my choice column which contains the market share...

• Replies: 1
• Views: 1,614
10-31-2013, 05:35 PM
25. ### SAS GLIMMIX subject specific estimates

I am trying to analyze a dataset where each subject has 12 repeated measures (quarterly, over 3 years). I want to extract subject specific estimates...

• Replies: 3
• Views: 997
07-08-2015, 01:41 PM
26. ### Newbie Logistic regression/weighted regression

Greetings I have been reading this article http://vassarstats.net/logreg1.html and trying to understand it but I am getting confused at how they...

• Replies: 6
• Views: 2,324
07-31-2012, 05:03 PM
27. ### Calculate Intercept for multiple regression

I have been using a simple Logistic Regression method with Log odds and it works very well for me This is an example X yes no total Prob Odds Log...

• Replies: 0
• Views: 2,507
10-31-2012, 09:21 AM
28. ### 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...

• Replies: 0
• Views: 2,953
aix
06-01-2010, 02:48 PM
29. ### Multiple Regression

Hi, I am trying to do my analysis for my work but getting very confused. I am using multiple regression and have my dependent variable, which...

• Replies: 1
• Views: 1,866
08-11-2010, 11:30 PM
30. ### Multiple Regression, Analysing Attachment Dimensions

Hi, I am trying to do my analysis for my work but getting very confused. I am using multiple regression (SPSS version 17) and have my...

• Replies: 1
• Views: 3,699
08-11-2010, 09:58 AM
31. ### Linear Regression Models

I am being asksed if an equation is linear in the paramenters or variables and I am a bit lost. I understand that for something to be linear it cant...

• Replies: 1
• Views: 2,792
02-01-2009, 10:04 AM
32. ### Question: Sample size and regression

I have a question regarding sample size and regression. First, the following is a general overview of my study: Purpose of Study: To examine the...

• Replies: 0
• Views: 3,135
07-14-2011, 10:20 PM
33. ### Interpretaing the coefficients of polynomial regression and multiple regression.

How do i interpret the coefficients of the 2nd degree polynomial regression model: (crop yield)=1.22+2.1(Nitrogen doses)+3.1(Nitrogen doses)^2 ...

• Replies: 4
• Views: 1,397
10-12-2013, 08:00 AM
34. ### Robust regression

Hi, I am trying to use robust regression instead of ordinary least squares since my data set has a lot of outliers but I don't know if I have...

• Replies: 0
• Views: 4,110
03-28-2011, 09:18 PM
35. ### Linear Regression and Box-Cox transformation

Hi, I have a model which predicts the number of defects in a class which takes into account few standard independent variables like CK metrics....

• Replies: 0
• Views: 1,809
10-02-2013, 08:46 AM
36. ### Interpreting odds ratios

Deleted post

• Replies: 0
• Views: 1,267
08-13-2012, 05:07 PM
37. ### Doubt regarding Multiple Regression

Hi, I have some doubt in Multiple regression. I have Y as the dependent variable (mutual fund returns) I have many independent variables...

• Replies: 2
• Views: 3,011
04-24-2008, 01:13 PM
38. ### Comparing coefficients with different input dependent variables, but the same model.

I have the following problem. I have the following model I use per sector (for example: Industrial, telecom, tech etc.): cccountry = a +...

• Replies: 0
• Views: 1,579
06-10-2011, 11:12 AM
39. ### Linear Regression Model Help

Hi, I don't really understand how I go about this problem. I understand regression but I need a little help here. Question: Reaction time to a...

• Replies: 2
• Views: 2,520
04-29-2009, 09:36 PM
40. ### Linear regression: multiple independents?

Hello all you nice people! It's been such a long time since I used SPSS, but I now I have to analyse my data and I have very little time so I'm a...

• Replies: 0
• Views: 1,528
06-16-2012, 07:26 AM
41. ### Can AIC values be combined?

Hello! I have hunted far and wide on the net in an attempt to answer this. Essentially, I'm trying to combine two AIC scores from different parts...

• Replies: 1
• Views: 2,101
01-26-2016, 04:10 AM
42. ### Linear regression model - collinearity.

Hello everyone, I'm have a problem with my linear regression model, I really don't know what to do so I've decided to ask you for help. The...

• Replies: 1
• Views: 1,382
01-11-2014, 06:49 PM
43. ### Normality of residuals in regression: is it mandatory?

Hi everyone, as I said in a previous post I'm new to this forum, but I have basic concepts of statistics (I mean, I'm not a stat guru but I can deal...

• Replies: 3
• Views: 1,516
03-19-2014, 10:48 AM
44. ### Help with "nominal" variables and dummy coding

Hi. First of all, I'm sorry for not writing 100% correct as this is not my everyday language :) My quetion I'm working with linear...

• Replies: 3
• Views: 2,820
04-21-2012, 03:07 AM
45. ### beta coefficient for a logistic regression

I consider a simple model with binary variable Y (diseased vs non-diseased), variable X normally distributed among diseased and non-diseased with...

• Replies: 7
• Views: 1,559
03-01-2017, 04:57 PM
46. ### 2SLS - endogeneity issue

I am running a regression on the relationship between aid inflows and investment levels in developing countries. One obvious other explanatory...

• Replies: 1
• Views: 3,463
05-06-2006, 01:40 PM
47. ### Implement Young's Information Criterion in Matlab for analyzing recursive arx models

Hey For an assignment we want to implement the YIC instead of Aikake's information criterion because it's more suitable to fit our data. We have...

• Replies: 0
• Views: 1,579
11-20-2015, 04:24 AM
48. ### Anyone familiar with this statistical paradox?

I have discovered an interesting statistical paradox. If you familiar with it, please, let me know about its conventional name (or author's name) and...

• Replies: 0
• Views: 1,229
01-20-2015, 04:25 AM
49. ### What means "1/X weighted multiple regression"

What means 1/X weighted multiple regression? Is it just WLS with weights = "1/X" or I'm missing smth? :confused:

• Replies: 1
• Views: 4,601
12-12-2009, 01:42 PM
50. ### non-nested models in multilevel analysis

Hi, I have a question on multilevel analysis. I'm reading a book by Kreft & de Leeuw (Introducing Multilevel Analysis). They give an example for a...

• Replies: 1
• Views: 3,745
03-31-2011, 10:37 AM
51. ### Insignificant regression explanation-HELP!!!

Hi, As part of my dissertation I am doing a regression analysis in which I am examining if gender, age, Internet use, education and occupational...

• Replies: 5
• Views: 25,012
01-16-2011, 01:24 PM
52. ### Collinearity

Hi, Is there any possibility that if colinearity exists between two or more DV variables in a regression analysis, the regression analysis to be...

• Replies: 3
• Views: 5,892
01-17-2011, 08:00 AM
53. ### linear regression without intercept with dummy variables

Hello, i run simple linear with one dummy variables and no intercept. i would like to understand the meaning of this. for example, my beta1=1.2,...

• Replies: 1
• Views: 1,788
08-20-2016, 06:13 AM
54. ### Polynomial Regression

Hi, I have done a polynomial regression to some nonlinear (u-shaped) data by adding a squared term. Now, my R-squared 1.0 but my tolerance has...

• Replies: 1
• Views: 1,459
04-27-2013, 04:31 PM

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