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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### How do i create "nice" prediction hyperbola?

I would like to create a nice prediction hyperbola in my regression analysis, at this moment i am only getting some rather ugly ones and only where i...

• Replies: 3
• Views: 3,535
09-16-2010, 03:55 PM
2. ### 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...

• Replies: 8
• Views: 3,534
02-21-2013, 12:44 AM
3. ### What to do with very low Durbin-Watson?

For 100 companies, I have collected (i) `tweets` and (ii) corporate website `pageviews` for `148` days. The tweetvolume and pageviews per day are two...

• Replies: 0
• Views: 3,529
08-06-2012, 06:16 AM
4. ### Linear regression vs ancova - when to use which

Hi all, I have some data on species richness, latitude and temperature. In the past on this sort of data I have used multi-linear regression. But it...

• Replies: 1
• Views: 3,526
03-29-2012, 07:11 PM
5. ### How to find beta in a regression model?

Dear all, This might be a silly question, however I am a newbie when it comes to Stats. Im currently writing my thesis and for this I am analysing...

• Replies: 11
• Views: 3,525
01-28-2014, 01:07 PM
6. ### How to test INTERACTION

HI THERE, I have started recently using the multiple regression, I am runing now a model where I have 2 continous independent variables, and 4...

• Replies: 3
• Views: 3,520
05-15-2010, 09:22 PM
7. ### Growth Rates

I have a huge panel data set consisting of thousands of firms for a time period of 8 years. I would like to transform some of my variables. For...

• Replies: 2
• Views: 3,514
12-09-2010, 05:39 AM
8. ### xtlogit coefficient interpretations

I'm working on a project where I am using a logit model in the program Stata. I'm using the xtlogit command with panel data for city and years. My...

• Replies: 0
• Views: 3,511
03-17-2012, 01:46 PM
9. ### Regression more than two Y variables

Hi, sorry this is probably a very stupid question! I'm just trying to finish m thesis proposal and have just realised that my statistics are wrong. I...

• Replies: 5
• Views: 3,509
02-04-2013, 02:12 PM
10. ### What does R, R square , Adjusted R square, STD error of estimates helps for ?

Hello After I run out the regression analysis, can someone enlighten me what can I get from R, R square, STD Error estimates and the adjusted r...

• Replies: 9
• Views: 3,506
12-08-2014, 06:40 PM
11. ### How to interpret parameter estimates

Hi, I have some output here from R, it contains the parameter estimates, the standard deviation of these estimates, the z value, the...

• Replies: 1
• Views: 3,497
11-15-2012, 05:58 PM
12. ### Logistic Regression Problem - HELP!

A local health clinic sent fliers to its clients to encourage everyone, but especially older persons at high risk of complications, to get a flue...

• Replies: 6
• Views: 3,497
05-16-2013, 09:39 AM
13. ### Dealing with outliers

We have this discussion from time to time, but it has become more pertinant to me now... Before I begin I should note that I am not really interested...

• Replies: 7
• Views: 3,496
12-30-2014, 10:16 PM
14. ### In stepwise regression, can the number of predictors be >n?

Hi, I'm getting an error when I try to run a stepwise regression with backward elimination - it says there is not enough data in the columns. I...

• Replies: 7
• Views: 3,495
06-14-2011, 07:54 AM
15. ### Question on Finding the Design Matrix

For the above question, I was wondering if someone could help me find the design amtrix in question a) It seems like from the question tat there...

• Replies: 9
• Views: 3,495
09-18-2012, 10:49 AM
16. ### Panel: Interaction and centering

Hi guys, I have a panel where I want to run a fixed effects regression with an interaction term. The problem is that one factor of the term is...

• Replies: 0
• Views: 3,483
11-01-2010, 08:12 AM
17. ### Regression with arctan function

Hello, I am currently working on a prepayment model for mortgage loans. For this I'd like to use a modified version of the Richard & Roll model....

• Replies: 0
• Views: 3,482
03-28-2013, 05:01 AM
18. ### Co-efficient interpretation in Gamma Regression Model

Hi Guys, I am trying to fit a gamma regression model using a log link model. Now, I get a negative co-efficient for one of my IVs. What is the...

• Replies: 0
• Views: 3,477
07-06-2011, 01:49 PM
19. ### regression analysis with non normal residuals

I am a relative novice at stats so I would appreciate any help on this. Please let me know if I need to provide any more info to answer the question....

• Replies: 0
• Views: 3,476
03-04-2011, 09:55 AM
20. ### Report Interaction Term Coefficients, SE, t, p, as well as the interaction?

A bit of a basic question: I ran regression analyses to test moderating effects of gender and stress on anxiety. So, DV: Anxiety. IVs:...

• Replies: 4
• Views: 3,475
01-23-2012, 05:01 AM
21. ### Cook's distance for nonlinear regression

Cook's distance was used to detect outliers in a linear regression model. But is it ok to use it with non-linear regression model?

• Replies: 0
• Views: 3,470
02-17-2013, 06:58 PM
22. ### Time-series analysis with three variables

:wave:I have some time-series across three variables. I want to see the association of two variables while controlling for a third. I am using SPSS...

• Replies: 0
• Views: 3,469
10-13-2009, 08:26 AM
23. ### 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: 3,464
05-06-2006, 01:40 PM
24. ### Regression with only positive values

Hi, I'm new and I don't have much mathematical knowledge, just the basis. I have 13 independent variables, and I'm trying to know how much each of...

• Replies: 5
• Views: 3,457
01-08-2013, 05:07 PM

I am checking assumptions and outliers before running moderated regression analysis. I wonder if I should check normality, linearity, and equal...

• Replies: 3
• Views: 3,455
10-19-2013, 05:21 PM
26. ### How to Compare B Coefficients within and between models in R?

Hello people, I am new to this forum and it would be great if some experienced people could help met out. I would like to know what the...

• Replies: 1
• Views: 3,455
12-25-2016, 04:16 AM
27. ### Z-test in NB regression model

what is the null hypothesis of z-test in negative binomial regression?

• Replies: 4
• Views: 3,454
06-15-2011, 10:54 AM
28. ### Regression models with pre and post tests

I'd like to use a path analysis for N=37 with three exo. variables, i.e., R, M, S? I don't use a latent variable in my model, and wonder if the N>200...

• Replies: 0
• Views: 3,446
07-02-2011, 05:48 AM
29. ### Multiple Moderated Regression Help!

Hi folks, i need help regarding multiple moderated regresison analysis in SPSS. I have one independent variable (X), one Dependent variable (Y)...

• Replies: 3
• Views: 3,442
08-27-2011, 09:42 AM
30. ### Multiple Regression in Matlab

Good afternoon, I have a little problem in matlab using the regstats function. I have four matrices with information. Let's name them A, B, C and...

• Replies: 0
• Views: 3,442
08-13-2013, 10:50 AM
31. ### Multiple DVs

Hey all, I've been tasked with determining the "best" IV (various demographics) for predicting overall purchase behavior, as determined by...

• Replies: 1
• Views: 3,435
06-12-2010, 12:50 AM
32. ### how many time dummies in pooled regression?

Hi guys, I want to perform a cross sectional time series regression - fixed effects model. Am I correct that it is better to group time by time...

• Replies: 2
• Views: 3,434
02-26-2012, 06:43 PM
33. ### Moderating variable in Regression

I'm running a regression with a Moderating variable (M) and an independent variable (X). Its my understanding that I need to run the following...

• Replies: 1
• Views: 3,432
07-26-2010, 10:36 AM
34. ### Logistic regression

What does it mean when I have insignificant Wald test for all my predictor variables in the (Variables in the Equation) table, although the goodness...

• Replies: 13
• Views: 3,432
11-02-2011, 01:36 PM
35. ### Novice needs help with Maximum Likelihood Estimation of Logit Model

Hi all, I’d be grateful for some help. I realise this is perhaps elementary stuff for many but as someone without a formal statistics background, I...

• Replies: 3
• Views: 3,431
09-16-2011, 09:21 AM
36. ### Multiple regression and correlation matrix

Hi. I got some data I am about to present in a report. At first I created a correlation matrix, and there was no statistical significant...

• Replies: 2
• Views: 3,430
06-09-2012, 09:17 PM
37. ### Coefficients in linear regression

hi i am using spss 17.0 i am using linear regression to predict behaviours for the coefficent output does the constant and the indperpentant...

• Replies: 6
• Views: 3,423
07-21-2011, 03:32 PM
38. ### Transformation of Data - NO linearity!

PROBLEM >>>>>>>>> The savings rate (personal savings/disposible income) and per capita disposible income (DPI) are listed for the 50 countries...

• Replies: 2
• Views: 3,421
04-07-2011, 01:17 AM
39. ### help with interpretation of multiple regression results

Dear forum members, I am running multiple regressions with SPSS and I need help with possible interpretation of my results. Firm...

• Replies: 0
• Views: 3,418
09-03-2009, 02:19 AM
40. ### How to deal with the dependent predictors in the regression ?

My data have some high correlated predictors, so it fit worse in the linear regression. what regression methods are proposed to solve this...

• Replies: 4
• Views: 3,418
11-04-2010, 11:18 AM
41. ### Distribution of Residual Sum of Squares

We know that the residual sum of squares (RSS) has a  sigma^2 * Chi Square (n-p degrees of freedom) So if I want to simulate many...

• Replies: 3
• Views: 3,418
01-02-2014, 09:07 PM
42. ### Desperately Need Help with Regression Analysis..Please :)

hello :) I'm new here (and in doing statistics in general). I have to do a regression analysis on panel data (10 groups, 9 years - 90...

• Replies: 4
• Views: 3,417
01-20-2011, 11:17 AM
43. ### regression analysis with an infinite number of predictors....

so i was reading this article and kinda got me wondering... for standard, OLS multiple regression... can we have an infinite number of...

• Replies: 2
• Views: 3,417
03-16-2011, 03:30 PM
44. ### Multiple regression, removing very small coefficients

Hello, I did 'backwards method' multiple regression in SPSS to predict 'energy'. The R^2 value is 0.951. Here is the final output model of the...

• Replies: 1
• Views: 3,412
02-28-2012, 11:42 AM
45. ### What GLM should is use in this dataset?

Hi everyone and thank you! I'm not a student of statistics, i'm in a different but somehow related field. i'm doing this research, been reading...

• Replies: 1
• Views: 3,408
03-05-2011, 04:22 AM
46. ### Test Review HELP!!

this is a example for my test review and i dont know how to do b,c,d,e parts of it can someone tell me how to do it/the answer so i can better...

• Replies: 1
• Views: 3,408
04-23-2011, 11:18 AM
47. ### Regression in longitudinal survey data

Hello, I have some longitudinal survey data which measures change in depression from time 1 to time 2. I want to analyse what factors, such as...

• Replies: 0
• Views: 3,399
07-26-2012, 11:17 AM
48. ### 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...

• Replies: 8
• Views: 3,399
07-06-2016, 07:59 PM
49. ### Multi-Factors model - Linear regression on Market Size

Dear all, I'm working on a multi factors model analysis to come up with a formula to estimate market size of some countries based on several...

• Replies: 4
• Views: 3,393
05-22-2013, 12:46 PM
50. ### Assumption of Linearity not fulfilled - what to do?

Dear All, I want to conduct a moderated hierarchical regression. I have 3 IVs and one moderator. I started to test the underlying assumptions of...

• Replies: 1
• Views: 3,393
09-17-2014, 02:53 PM
51. ### weird difference between measures of Goodness-of-Fit ??

Dear stats friends I have run an ordinal regression in SPSS on 700 subjects I have data on an ordinal DV: heart disease score between 0 and 3. ...

• Replies: 2
• Views: 3,389
12-30-2016, 12:45 PM
52. ### Poisson regression

Hello, Is it possible to do a Poisson regression with only 6 observations? What is the minimum number of observations possible? Giovanna

• Replies: 0
• Views: 3,387
06-18-2009, 05:48 AM
53. ### Multiple vs univariate regression

Hi, I was wondering what are the pitfalls of fitting multiple univariate regression equations to a response instead of fitting all independent...

• Replies: 1
• Views: 3,386
09-03-2010, 05:47 PM
54. ### who can help me with multiple regression analysis???

I've calc correlation coefficients between several variables. The results are very promissing, since showing high correlation. The multiple...

• Replies: 1
• Views: 3,383
09-19-2005, 06:44 PM
55. ### 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: 3,380
05-29-2011, 07:01 PM

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