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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...

    Started by konherr‎, 07-25-2011 10:21 AM
    • Replies: 0
    • Views: 2,325
    07-25-2011, 10:21 AM Go to last post
  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...

    Started by Andre Fernandez‎, 07-24-2011 07:12 AM
    linear regression, matlab, mixed effects models
    • Replies: 0
    • Views: 1,474
    07-24-2011, 07:12 AM Go to last post
  3. standardised coefficients

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

    Started by Sylviastat‎, 07-23-2011 03:44 PM
    • Replies: 7
    • Views: 3,738
    07-23-2011, 04:51 PM Go to last post
  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...

    Started by sfspitfire23‎, 07-22-2011 01:14 PM
    • Replies: 0
    • Views: 3,263
    07-22-2011, 01:14 PM Go to last post
  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...

    Started by aarong‎, 07-21-2011 09:15 AM
    • Replies: 6
    • Views: 3,445
    07-21-2011, 03:32 PM Go to last post
  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...

    Started by eis‎, 07-20-2011 01:43 PM
    comparison, geomorphology, linear, power law
    • Replies: 0
    • Views: 3,243
    07-20-2011, 01:43 PM Go to last post
  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...

    Started by gadus‎, 07-19-2011 01:09 PM
    • Replies: 1
    • Views: 6,422
    07-19-2011, 08:13 PM Go to last post
  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...

    Started by katep‎, 07-19-2011 04:15 PM
    • Replies: 0
    • Views: 2,102
    07-19-2011, 04:15 PM Go to last post
  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...

    Started by chrisquinze‎, 07-19-2011 06:09 AM
    • Replies: 1
    • Views: 3,029
    07-19-2011, 08:27 AM Go to last post
  10. Testing for tau equivalence in a simple CFA model, based on correlation matrix

    For an assignment we are provided with only a (polychoric) correlation matrix. One of the questions concerns the different measurement models that...

    Started by mhermans‎, 07-19-2011 07:28 AM
    • Replies: 0
    • Views: 4,063
    07-19-2011, 07:28 AM Go to last post
  11. 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.

    Started by Tzu Chjeh Wu‎, 07-19-2011 01:07 AM
    • Replies: 1
    • Views: 1,869
    07-19-2011, 01:27 AM Go to last post
  12. 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...

    Started by Rosie‎, 07-18-2011 03:18 PM
    gretl, panel, probit, regression, time series
    • Replies: 1
    • Views: 5,323
    07-18-2011, 05:35 PM Go to last post
  13. 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...

    Started by copyfriend‎, 07-18-2011 01:11 PM
    • Replies: 4
    • Views: 2,357
    07-18-2011, 02:02 PM Go to last post
  14. '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...

    Started by StaisticallyAmateur‎, 07-18-2011 08:28 AM
    • Replies: 0
    • Views: 1,994
    07-18-2011, 08:28 AM Go to last post
  15. 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)....

    Started by JRadinger‎, 07-17-2011 12:48 PM
    • Replies: 2
    • Views: 1,830
    07-18-2011, 03:40 AM Go to last post
  16. Please help - all pi values are high!

    Hi there, I was about to prove my argument how different variables affect water availibility in different countries. Unfortunately, I ran the...

    Started by Sylviastat‎, 07-16-2011 06:34 AM
    • Replies: 11
    • Views: 2,963
    07-17-2011, 07:17 PM Go to last post
  17. 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...

    Started by CĂ©line Stas‎, 07-17-2011 08:33 AM
    • Replies: 1
    • Views: 2,365
    07-17-2011, 10:52 AM Go to last post
  18. Multicollinearity

    Hi, I am trying to detect multi-collinearity in my regression model.I ran the Belsley, Kuh, Welsch Variance-decomposition and i saw that for k=607...

    Started by 12345678‎, 07-16-2011 04:39 AM
    • Replies: 0
    • Views: 1,941
    07-16-2011, 04:39 AM Go to last post
  19. 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...

    Started by cyrus‎, 07-15-2011 01:10 AM
    • Replies: 0
    • Views: 2,056
    07-15-2011, 01:10 AM Go to last post
  20. 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...

    Started by akak‎, 07-14-2011 10:20 PM
    • Replies: 0
    • Views: 3,148
    07-14-2011, 10:20 PM Go to last post
  21. 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...

    Started by Wolf_2011‎, 07-14-2011 04:15 AM
    • Replies: 0
    • Views: 3,907
    07-14-2011, 04:15 AM Go to last post
  22. 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)....

    Started by cassandra010666‎, 07-13-2011 08:46 PM
    • Replies: 1
    • Views: 6,897
    07-13-2011, 09:16 PM Go to last post
  23. 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...

    Started by anujg‎, 07-13-2011 03:57 AM
    chi square, discrete random variables, goodness of fit, large data sets, poisson distribution
    • Replies: 1
    • Views: 2,920
    07-13-2011, 04:20 AM Go to last post
  24. 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...

    Started by cglinn‎, 07-12-2011 09:31 AM
    • Replies: 9
    • Views: 4,269
    07-12-2011, 04:34 PM Go to last post
  25. 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...

    Started by gilisegall‎, 07-11-2011 01:51 PM
    • Replies: 6
    • Views: 16,303
    07-12-2011, 09:00 AM Go to last post
  26. 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...

    Started by sapiensgladio‎, 07-11-2011 01:37 PM
    conversion, regression
    • Replies: 3
    • Views: 3,094
    07-11-2011, 08:21 PM Go to last post
  27. 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...

    Started by afsechem‎, 07-11-2011 02:11 PM
    optimization, srm
    • Replies: 0
    • Views: 2,218
    07-11-2011, 02:11 PM Go to last post
  28. 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...

    Started by trinker‎, 07-11-2011 11:25 AM
    • Replies: 1
    • Views: 1,831
    07-11-2011, 11:40 AM Go to last post
  29. 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...

    Started by l3a9k‎, 06-14-2011 02:40 PM
    • Replies: 12
    • Views: 15,115
    07-09-2011, 11:57 AM Go to last post
  30. 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...

    Started by choulcc‎, 07-08-2011 10:08 PM
    • Replies: 0
    • Views: 1,962
    07-08-2011, 10:08 PM Go to last post
  31. 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...

    Started by Ancalagon The Black‎, 07-06-2011 01:49 PM
    gamma regression, glm, regression
    • Replies: 0
    • Views: 3,485
    07-06-2011, 01:49 PM Go to last post
  32. 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...

    Started by l3a9k‎, 07-06-2011 01:43 PM
    • Replies: 0
    • Views: 2,873
    07-06-2011, 01:43 PM Go to last post
  33. 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...

    Started by Pachy‎, 07-05-2011 05:14 PM
    • Replies: 1
    • Views: 2,037
    07-05-2011, 06:35 PM Go to last post
  34. 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...

    Started by NN_STAT‎, 07-05-2011 12:53 AM
    • Replies: 3
    • Views: 1,846
    07-05-2011, 01:46 AM Go to last post
  35. 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,...

    Started by NN_STAT‎, 07-03-2011 04:02 AM
    • Replies: 0
    • Views: 1,476
    07-03-2011, 04:02 AM Go to last post
  36. 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...

    Started by Sencer Corlu‎, 07-02-2011 05:48 AM
    • Replies: 0
    • Views: 3,458
    07-02-2011, 05:48 AM Go to last post
  37. 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...

    Started by Sciarada‎, 06-30-2011 08:48 PM
    interaction effect, likelihood ratio test, logistic regression
    • Replies: 10
    • Views: 5,270
    07-01-2011, 08:03 PM Go to last post
  38. Curve estimation command in SPSS to help determine type of regression?

    Hi everyone, will the curve estimation command in SPSS help me in determining the type of regression? For example, I am doing regression between...

    Started by graphicsgriffin‎, 07-01-2011 04:33 PM
    • Replies: 0
    • Views: 7,315
    07-01-2011, 04:33 PM Go to last post
  39. Is this method to compare F value correct?

    Hi. I am getting this result for my regression showing the F value. I used this website to calculate the critical-F value and compared it to...

    Started by graphicsgriffin‎, 06-30-2011 01:57 PM
    • Replies: 4
    • Views: 5,050
    07-01-2011, 04:19 PM Go to last post
  40. 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....

    Started by plotz‎, 06-29-2011 10:59 AM
    • Replies: 0
    • Views: 3,558
    06-29-2011, 10:59 AM Go to last post
  41. Question 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...

    Started by Pooven‎, 06-28-2011 05:05 PM
    r squared
    • Replies: 2
    • Views: 4,042
    06-29-2011, 06:14 AM Go to last post
  42. 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...

    Started by mishery‎, 10-25-2005 11:56 AM
    • Replies: 5
    • Views: 5,862
    06-28-2011, 07:51 AM Go to last post
  43. Question 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...

    Started by heystar‎, 06-27-2011 11:06 PM
    regression, stratified sampling, weights
    • Replies: 0
    • Views: 60,965
    06-27-2011, 11:06 PM Go to last post
  44. 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.

    Started by graphicsgriffin‎, 06-27-2011 04:30 PM
    • Replies: 1
    • Views: 2,988
    06-27-2011, 04:43 PM Go to last post
  45. R squared value and type of regression

    Hi. I am doing regression in Excel between two factors. I am getting r squared value as follows: 0.435 when choosing linear 0.443 when choosing...

    Started by graphicsgriffin‎, 06-22-2011 03:23 PM
    • Replies: 6
    • Views: 7,368
    06-27-2011, 10:46 AM Go to last post
  46. 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

    Started by graphicsgriffin‎, 06-27-2011 10:39 AM
    • Replies: 0
    • Views: 6,232
    06-27-2011, 10:39 AM Go to last post
  47. 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...

    Started by meyzy‎, 06-25-2011 02:30 AM
    • Replies: 0
    • Views: 2,835
    06-25-2011, 02:30 AM Go to last post
  48. 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...

    Started by sloppy‎, 06-25-2011 01:14 AM
    • Replies: 0
    • Views: 2,236
    06-25-2011, 01:14 AM Go to last post
  49. about control variable

    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...

    Started by wohu‎, 06-08-2011 01:06 AM
    • Replies: 2
    • Views: 2,304
    06-24-2011, 02:04 PM Go to last post
  50. 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...

    Started by jamesmartinn‎, 06-24-2011 11:40 AM
    • Replies: 3
    • Views: 2,685
    06-24-2011, 11:59 AM Go to last post
  51. 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...

    Started by mikeme‎, 06-23-2011 01:50 PM
    • Replies: 2
    • Views: 3,601
    06-23-2011, 02:38 PM Go to last post
  52. 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...

    Started by raviepic3‎, 06-23-2011 01:09 PM
    check answer, regression equation
    • Replies: 0
    • Views: 1,705
    06-23-2011, 01:09 PM Go to last post
  53. 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,...

    Started by Rosario Martorana‎, 06-23-2011 03:20 AM
    • Replies: 0
    • Views: 2,622
    06-23-2011, 03:20 AM Go to last post
  54. 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...

    Started by ardur‎, 06-22-2011 06:42 PM
    • Replies: 0
    • Views: 1,683
    06-22-2011, 06:42 PM Go to last post
  55. 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...

    Started by steffdov‎, 06-14-2011 08:40 AM
    • Replies: 1
    • Views: 2,108
    06-22-2011, 01:46 PM Go to last post
  56. 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...

    Started by paddyg‎, 06-15-2011 04:32 AM
    • Replies: 6
    • Views: 11,246
    06-22-2011, 01:33 PM Go to last post
  57. 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...

    Started by srabeah‎, 06-22-2011 03:45 AM
    • Replies: 0
    • Views: 2,236
    06-22-2011, 03:45 AM Go to last post
  58. 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...

    Started by najmehjami‎, 06-21-2011 09:51 AM
    • Replies: 0
    • Views: 2,574
    06-21-2011, 09:51 AM Go to last post
  59. 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 ...

    Started by Mariana Ramos‎, 06-21-2011 05:00 AM
    effect size, power, quadratic effect, regression
    • Replies: 0
    • Views: 1,581
    06-21-2011, 05:00 AM Go to last post
  60. 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...

    Started by tiggerkate‎, 06-19-2011 06:36 AM
    • Replies: 2
    • Views: 2,632
    06-21-2011, 02:41 AM Go to last post

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