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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### what changes if I add an autoregressive AR(..) term?

Hello everyone! I'm working on a time series regression, which I want to keep linear. I have trouble with serial correlation, there is serious...

• Replies: 0
• Views: 2,325
07-25-2011, 10:21 AM
2. ### Mixed effects modelling

Hey all, Im building a linear mixed effects model of a variable, lets say the headway time maintained by drivers in car following situations. I...

• Replies: 0
• Views: 1,474
07-24-2011, 07:12 AM
3. ### standardised coefficients

Hi there, I have a basic question - SPSS output gives me unstandardized coefficients and standardized coefficient (the latter looking much nicer -...

• Replies: 7
• Views: 3,738
07-23-2011, 04:51 PM
4. ### Regression interpretation

Hey guys, I'm doing an OLS regression with an ending balance (econometrics class) as my dependent variable and the S&P 500 (among others) as my...

• Replies: 0
• Views: 3,263
07-22-2011, 01:14 PM
5. ### 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: 3,445
07-21-2011, 03:32 PM
6. ### Comparison of linear and power law regression models

I'm quite a newb at statistics, with only one college-level statistics course behind me. I apologize in advance if my terminology and/or...

• Replies: 0
• Views: 3,243
eis
07-20-2011, 01:43 PM
7. ### Comparison of non-linear regressions from two different samples

Hi at all! I got a big problem during my data analysis and I’m already looking for a solution a few days. I hope somebody here can help me. I...

• Replies: 1
• Views: 6,422
07-19-2011, 08:13 PM
8. ### Linear regression of autocorrelated time series

Hi everyone, I am doing an analysis of two time series using linear regression. Now I would like to now if the regression coefficient and...

• Replies: 0
• Views: 2,102
07-19-2011, 04:15 PM
9. ### Basic information on binary logistic regression

Can anyone point me in the direction of a webpage that provides an overview of the binary logistic regression technique and ideally instructions on...

• Replies: 1
• Views: 3,029
07-19-2011, 08:27 AM
10. ### New here, I have a question about checking if a set of numbers are regressive

Hi! I'm new here, I'd like to know how does one check if a set of data is regressive? Thanks.

• Replies: 1
• Views: 1,869
07-19-2011, 01:27 AM
11. ### Gretl - Pooled Time Series Cross Sectional Data

I've been working on a multiple regression analysis on bank failures using a probit model. I am currently using cross sectional data but I would...

• Replies: 1
• Views: 5,323
07-18-2011, 05:35 PM
12. ### An easy question about Generalized Linear Model

Hello everyone, I just started using GLM and was stuck by an easy question of GLM. If I already obtain the estimates of the parameters, let's...

• Replies: 4
• Views: 2,357
07-18-2011, 02:02 PM
13. ### 'Key Drivers of Satisfaction Analysis' - Help Please!

For a project I am undertaking, I have carried out an extensive survey of satisfaction. I have a list of criteria ranked with the level of customer...

• Replies: 0
• Views: 1,994
07-18-2011, 08:28 AM
14. ### Regression with "fuzzy" values

Hello Stats-People, I want to do a regression analysis. Therefore I have my dependent variable in a metric format (values ranging from 0.7-10000)....

• Replies: 2
• Views: 1,830
07-18-2011, 03:40 AM
15. ### How to choose the best predictors when b and beta indicate different predictors.

Hey everyone, for my thesis I'm investigating the relationship that can exist between the emotion of boredom and interest through the analysis of...

• Replies: 1
• Views: 2,365
07-17-2011, 10:52 AM
16. ### Log-linear Regression Models with only the cell mean, variance, and sample size

Hi, I am working on a project with a contingency table with provide only the mean, variance, and sample size, but don't have the exact count of...

• Replies: 0
• Views: 2,056
07-15-2011, 01:10 AM
17. ### 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: 3,148
07-14-2011, 10:20 PM
18. ### Moderated regression: correlation between moderator and predictor

Hi All, my data suggest a significant positive moderation that can be grounded on (somewhat ;)) strong theory. Everything looks fine...

• Replies: 0
• Views: 3,907
07-14-2011, 04:15 AM
19. ### Penalty Analysis

Hi, how do we interpret the result of penalty analysis having negative mean drop (which is sig) as well as negative penalties (which is also sig)....

• Replies: 1
• Views: 6,897
07-13-2011, 09:16 PM
20. ### Poisson distribution - goodness of fit

I want to test goodness of fit for poisson distribution for a very large data set (~millions of records). Can anybody suggest a method? All the...

• Replies: 1
• Views: 2,920
BGM
07-13-2011, 04:20 AM
21. ### Help with Regression Analysis

It's been a while since I've done a regression analysis. I'm trying to run a multivariate regression analysis in Excel to determine whether or not...

• Replies: 9
• Views: 4,269
07-12-2011, 04:34 PM
22. ### stepwise regression with dummy variables

Hello there, I want to do a stepwise regression in order to find relevant predicting variables, but one of the possible predicting variables is a...

• Replies: 6
• Views: 16,303
07-12-2011, 09:00 AM
23. ### Find the affect of introducing a variable into a Data Set

Good morning, Everyone! I apologize, but I must admit that it's been a few years since I've been engaged in any statistical analysis; that being...

• Replies: 3
• Views: 3,094
07-11-2011, 08:21 PM
24. ### 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: 2,218
07-11-2011, 02:11 PM
25. ### Proportional DV (Sounding Board)

I'm working through a qualitative study around reading strategies that may gain some benifit through quantitative analysis. Set up: 9 teachers...

• Replies: 1
• Views: 1,831
07-11-2011, 11:40 AM
26. ### Multicollinearity and AIC in stepwise regression

I am trying to run a stepwise regression with backward elimination on a set of water chemistry data in which there's a high degree of...

• Replies: 12
• Views: 15,115
Laz
07-09-2011, 11:57 AM
27. ### Poisson regression problem

I was doing a Poisson regression for my data. I got a bunch of 0 or 1 (response variable) data and I used GLM in R to fit the model. Then I found...

• Replies: 0
• Views: 1,962
07-08-2011, 10:08 PM
28. ### 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: 3,485
07-06-2011, 01:49 PM
29. ### All possible sub-sets regression in SPSS

Hi there, I’d like to do an “all possible sub-sets” regression analysis in SPSS with six parameters to model my dependent vbl, but am not very savvy...

• Replies: 0
• Views: 2,873
07-06-2011, 01:43 PM
30. ### Categorical predictors in multiple regression

Hi, I have a question my thesis advisor cant help with. I'm trying to test the hypothesis that ambivalence towards eating meat is moderated by...

• Replies: 1
• Views: 2,037
07-05-2011, 06:35 PM
31. ### Can I compare models like this ?

Hi, I was trying to fit a linear regression model (simple), for a set of data that shows a very strong linear relation between X and Y. Linearity...

• Replies: 3
• Views: 1,846
07-05-2011, 01:46 AM
32. ### which model to use ?

Hello Guys, I have a little problem that needs to be solved in statistical way. I have a sensor, that when comes in interaction with some gas,...

• Replies: 0
• Views: 1,476
07-03-2011, 04:02 AM
33. ### 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: 3,458
07-02-2011, 05:48 AM
34. ### interaction in logistic regression

Hi, I have run a moltinomial logistic regression and wanted to test for moderation effects of some variables so I tested the model with main effects...

• Replies: 10
• Views: 5,270
07-01-2011, 08:03 PM
35. ### Alternative to Hausman test? Fixed-/Random-Effects with robust SEs

Hi everyone! After reading loads and loads of material about tests, I have still not been able to come up with a satisfying solution to my probem....

• Replies: 0
• Views: 3,558
06-29-2011, 10:59 AM
36. ### Coefficient of Determination

Hi there, I'm using non-linear regression (specially I'm using neural networks for time series prediction) and I'm a bit unsure about the...

• Replies: 2
• Views: 4,042
06-29-2011, 06:14 AM
37. ### Collinearity help

I saw a suggestion on a web page for dealing with collinearity I had not seen before. http://www2.chass.ncsu.edu/garson/pa765/tacq.htm "Treat...

• Replies: 5
• Views: 5,862
06-28-2011, 07:51 AM
38. ### obtaining β(hat)s from weighted least square regression

I'm doing Regression analysis under stratified random sampling for my research since it's usually assumed in many textbooks that the data is simple...

• Replies: 0
• Views: 60,965
06-27-2011, 11:06 PM
39. ### I am getting very vey small p-values. Is it normal?

Hi. I am doing correlations and linear regressions and getting p-values as small as 2 E -40 Is it normal? and what does it mean? Thanks a lot.

• Replies: 1
• Views: 2,988
06-27-2011, 04:43 PM
40. ### Logarithmic regression in SPSS

Hi, does anyone know how to use non-linear logarithmic regression in SPSS? I have one DV and one IV. Thanks

• Replies: 0
• Views: 6,232
06-27-2011, 10:39 AM
41. ### Transform data to Ln

I have a research and I use regression to analyze my data. first I input my datumn in spss and analyze those with regression. the result is all of...

• Replies: 0
• Views: 2,835
06-25-2011, 02:30 AM
42. ### Interpreting hree way interactions

I'm trying to interpret two significant three-way interactions. I've used hierarchical regression to analyse my data, and I have come up with two...

• Replies: 0
• Views: 2,236
06-25-2011, 01:14 AM

Dear All, I have a question here. when I put control my variable in my multiple regression in spss, why the result is the same as that of no...

• Replies: 2
• Views: 2,304
06-24-2011, 02:04 PM
44. ### Sphericity

Hi! I'm Planning on running a simulation, and one of my conditions I'm varying is whether a set of variables Meet the sphericity assumption in a 1...

• Replies: 3
• Views: 2,685
06-24-2011, 11:59 AM
45. ### Sample Size Calculation for Multiple Regression

Hi Everyone, I would like to apologize in advance for the question below, but my level of knowledge in statistics is mediocre at best. I am...

• Replies: 2
• Views: 3,601
06-23-2011, 02:38 PM
46. ### Cross check the regression equation correctness

People, i have this problem From the following data obtain the two regression equations Sales 06 02 10 04 08 Purchase09 11 05 08 07 i...

• Replies: 0
• Views: 1,705
06-23-2011, 01:09 PM
47. ### Factorial design and regression

Hi All, I need some support on a regression needed for a factorial design. For sake of clarity I have to tell I am a dummy on statistical topic,...

• Replies: 0
• Views: 2,622
06-23-2011, 03:20 AM
48. ### A query related to Bayesian Regression

I had a query related to Bayesian Regression and I was wondering if someone had any ideas : So in the proper Bayesian case, we have the following...

• Replies: 0
• Views: 1,683
06-22-2011, 06:42 PM
49. ### Correlation between predictive variables in multiple regression

I have several response variables which are explained by many different explanatory variables. I have one value for each day for each variable, both...

• Replies: 1
• Views: 2,108
06-22-2011, 01:46 PM
50. ### Confusion over how to calculate regression coefficient

I'm trying to find the regression coefficient of one set of a data on another. There is a linear relationship between the two sets of data. After a...

• Replies: 6
• Views: 11,246
06-22-2011, 01:33 PM
51. ### Non-linear multiregression analysis

Dear experts, Is anyone knows about non-linear multiregression analysis? Can anyone explain it to me the methods or etc. Is there any reference or...

• Replies: 0
• Views: 2,236
06-22-2011, 03:45 AM
52. ### error structure

Could anyone please clarify what does "error structure distribution" in a regression model exactly refer to? I'm trying to relate "number of...

• Replies: 0
• Views: 2,574
06-21-2011, 09:51 AM
53. ### Power calculation in regression for curviliear effect

Hi! I performed a regresson analysis to test a curvilinear effect. I've followed Aiken & West procedures Center X, Squared centered X ...

• Replies: 0
• Views: 1,581
06-21-2011, 05:00 AM
54. ### Including beta coeffiicients in logistic regression

Dear all, I've posted the same query in the biostatistics section but as it is specific to logistic regression, I thought it a good idea to try...

• Replies: 2
• Views: 2,632
06-21-2011, 02:41 AM

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