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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. P Values on the Intercept

    Hi, I have done a regressional analysis of a data set based on promotions to test the hypothesis that a specific qualification / specialisation...

    Started by wetdog‎, 09-28-2011 12:23 PM
    • Replies: 2
    • Views: 4,432
    10-11-2011, 01:38 PM Go to last post
  2. GLM help with interactions

    I have a regression model I am trying to build using GLM. I have a continuous response variable, a main variable of interest that is dichotomous and...

    Started by pjtatman‎, 10-11-2011 03:49 PM
    • Replies: 1
    • Views: 2,582
    10-11-2011, 04:47 PM Go to last post
  3. Ways of showing for bivariate data

    Hello, What are the ways of showing that the bivariate date fits the simple regression model? One of the ways is showing the correlation between...

    Started by hsian90‎, 10-13-2011 12:15 PM
    • Replies: 2
    • Views: 2,814
    10-13-2011, 01:40 PM Go to last post
  4. Least Square Estimators

    When we only have sample size of 2,can we still calculate the least squares estimators for alpha and beta? ?

    Started by hsian90‎, 10-13-2011 12:23 PM
    • Replies: 3
    • Views: 1,935
    10-13-2011, 06:43 PM Go to last post
  5. Smile Small question regarding linear mixed effect model

    Thanks so much for reading my post. I've listed key points below. Hopefully once completing reading my problem will become clear. X is an...

    Started by aaphill‎, 10-13-2011 10:49 PM
    • Replies: 0
    • Views: 1,866
    10-13-2011, 10:49 PM Go to last post
  6. Correlation Coefficient

    Suppose X is transformed to cX, and Y is transformed to dY where c and d are constant, what happens to the correlation coefficient?? Is it...

    Started by hsian90‎, 10-14-2011 04:50 AM
    • Replies: 0
    • Views: 1,707
    10-14-2011, 04:50 AM Go to last post
  7. Another Regression Question

    Hey everybody. I'm at it again with regression questions. If you have the time to help me with some questions I would appreciate it. Using...

    Started by USMstudent85‎, 10-14-2011 11:26 AM
    • Replies: 10
    • Views: 2,901
    10-14-2011, 01:37 PM Go to last post
  8. Drawing polynomial out of regression results table of a fixed effects regression

    Dear all, maby its a simple question but I could not find a compelling answer in books or papers: I run a fixed effects regression giving me a...

    Started by balae‎, 10-14-2011 09:29 PM
    • Replies: 3
    • Views: 2,818
    10-15-2011, 04:06 PM Go to last post
  9. Lightbulb Bootstrapping confidence intervals for prediction based on SE of the coefficients?

    Is it remotely legitimate to use the standard errors of the coefficients from linear regression in a Monte Carlo simulation to bootstrap 2.5%/97.5%...

    Started by bernoulli‎, 10-15-2011 08:35 PM
    bootstrap, confidence interval, regression
    • Replies: 0
    • Views: 1,578
    10-15-2011, 08:35 PM Go to last post
  10. How to run Multivariate regression model w/ lags in R

    Hello everyone, great resource here! I have done some googling and searching of forums, but I cant seem to find how to run a regression like the...

    Started by Raneff‎, 10-11-2011 07:17 PM
    • Replies: 1
    • Views: 3,084
    10-15-2011, 08:40 PM Go to last post
  11. Sum of Squares Model Proof

    I'm attempting the proof of the sum of squares model. I'm not exactly sure where to start but this is what I have to prove. sumYhati^2 = nYbar^2...

    Started by tk4210‎, 10-16-2011 01:26 AM
    • Replies: 1
    • Views: 5,194
    10-16-2011, 06:35 PM Go to last post
  12. Regression questions

    Hey everybody. I want to start out by saying Thank You for taking the time to look at my thread. I have completed my Stats course and now I am on to...

    Started by USMstudent85‎, 10-12-2011 11:13 AM
    2 Pages
    1 2
    • Replies: 28
    • Views: 6,818
    10-18-2011, 10:31 AM Go to last post
  13. Centered simple betas should be =?

    I'm reading Aiken and West Multiple Regression: Testing and Interpenetrating Interactions (p. 33-34) Assume CENTERED means: X_i-\bar{X}_i They...

    Started by trinker‎, 10-18-2011 06:50 PM
    • Replies: 2
    • Views: 2,329
    10-18-2011, 08:09 PM Go to last post
  14. Asymmetric confidence bands in nonlinear regression

    Hi, I would like to know the formula for asymmetric confidence bands in nonlinear regression. Figure 6 on this webpage is exactly what I'm looking...

    Started by craigsooman‎, 10-19-2011 02:43 PM
    • Replies: 0
    • Views: 2,564
    10-19-2011, 02:43 PM Go to last post
  15. Interpreting regression coefficients (transformed)

    Hello, I ran a GLM (poisson) analysis and have a list of my coefficients with their SEs. I need help interpreting the betas because the predictor...

    Started by Ochotona‎, 01-11-2010 10:16 PM
    • Replies: 14
    • Views: 22,132
    10-20-2011, 01:33 AM Go to last post
  16. logistic regression question

    Hi everyone, If you please advise me why in logitic regression if we have one dependent (binary) and 4 continuous variables, the r value is +ve...

    Started by Wael‎, 10-22-2011 02:08 PM
    • Replies: 2
    • Views: 2,800
    10-22-2011, 05:10 PM Go to last post
  17. Orthogonal projection onto linear span.

    Hi there. I was hoping someone could give me a starting point on this problem because I'm clueless. given y = x1 =

    Started by c2q‎, 10-23-2011 08:45 PM
    • Replies: 3
    • Views: 3,646
    10-24-2011, 12:55 PM Go to last post
  18. Need Help - Valuing Coefficients

    Hi guys (and gals), new to the forums. I work for a grocery store, and we're trying to determine the sales lift associated with a free sample...

    Started by Jonathan‎, 10-24-2011 01:56 PM
    • Replies: 2
    • Views: 1,967
    10-24-2011, 03:24 PM Go to last post
  19. What regression methods to study?

    I am currently putting in a proposal for an independent study course in the summer in regression. Part of it is which regression methods and...

    Started by noetsi‎, 10-24-2011 11:31 AM
    • Replies: 9
    • Views: 2,553
    10-24-2011, 03:49 PM Go to last post
  20. change in significance level (univariate vs multivariate)

    I have 3 independent variables, X, Y and Z when I do univariate regression on each of them, the t-statistics are -4.7, 1.8 and 2.2, respectively....

    Started by espes‎, 10-24-2011 06:35 PM
    • Replies: 4
    • Views: 5,111
    10-25-2011, 10:09 AM Go to last post
  21. t-test for categorical predictors in regression WRONG!?

    hey people... so i am sitting in my theory of GLMs class... and the prof just said something i had never ever heard in my life... which is that, in...

    Started by spunky‎, 10-26-2011 12:16 PM
    • Replies: 9
    • Views: 4,313
    10-26-2011, 01:08 PM Go to last post
  22. Logit regression what does the output actually mean?

    HI I have conducted a logistic model regression in MATLAB for a set of explanatory variables against a dependant variable. The explanatory variables...

    Started by jan*‎, 10-26-2011 02:06 PM
    • Replies: 1
    • Views: 2,329
    10-26-2011, 02:41 PM Go to last post
  23. Help on a project!!!

    I am doing a school project and trying to find a relationship between government deficit/GDP (dependent variable) and inflation, interest rate,...

    Started by Hao Wang‎, 10-20-2011 12:28 PM
    model, regression, research
    • Replies: 3
    • Views: 1,968
    10-26-2011, 05:51 PM Go to last post
  24. Excel mutliple regression

    I have a made a double regression output in excel 2007 but I don't know how to explain those outputs. Can anyone tell me what does the Regression...

    Started by newbiestats‎, 10-27-2011 07:28 AM
    • Replies: 0
    • Views: 1,585
    10-27-2011, 07:28 AM Go to last post
  25. tandard errors of the parameter estimates in a quadratic fit

    How do I estimate the standard errors of the parameter estimates in a quadratic fit? This page list the estimate for a linear fit:...

    Started by Ivan David Haigh‎, 10-27-2011 07:52 AM
    regression analysis
    • Replies: 2
    • Views: 4,014
    10-27-2011, 08:06 AM Go to last post
  26. HELP with the concept of "percentile" (for regressions)

    Hello everybody. This is my first post and I hope someone can help me with a problem I have. I am a complete begineer in statistics, I studied them...

    Started by KansaiRobot‎, 10-25-2011 10:00 PM
    • Replies: 2
    • Views: 3,009
    10-28-2011, 01:20 AM Go to last post
  27. Overall effect size measure for categorical variable

    Dear forum, I am running logistic regressions with categorical predictors (nominal, several categories, dummy coded). I use a LRT to test...

    Started by Thomas‎, 10-29-2011 07:34 AM
    • Replies: 0
    • Views: 2,943
    10-29-2011, 07:34 AM Go to last post
  28. Can I derive a standard error from a regression table, and do I need to???

    I am not sure if this can be done, so I would appreciate any insight. I only have a regression table that has IVs with unstandardized and...

    Started by UCFstudent‎, 10-29-2011 05:39 AM
    • Replies: 2
    • Views: 1,581
    10-29-2011, 07:38 AM Go to last post
  29. Sequence of Doing

    Is it a good practice to estimate the least square estimators of alpha and beta first, then followed by a study of 2D-plot graph? Or better to do...

    Started by hsian90‎, 10-14-2011 05:24 AM
    • Replies: 1
    • Views: 1,501
    10-29-2011, 07:42 AM Go to last post
  30. Autocorrelation/Regression

    Post deleted

    Started by Carlyn‎, 10-29-2011 09:06 AM
    • Replies: 4
    • Views: 3,029
    10-29-2011, 09:58 AM Go to last post
  31. Dynamic Regression

    Can we determine dominant factors using dynamic regression model?

    Started by Carlyn‎, 10-29-2011 10:36 PM
    • Replies: 0
    • Views: 1,579
    10-29-2011, 10:36 PM Go to last post
  32. Ridge Regression Estimators' properties...

    Hi there I'm studying about Ridge Regression Estimator(RRE) and have a question. There are 3 properties of RRE. First, RRE can be derived by...

    Started by subspaces‎, 10-30-2011 11:36 AM
    • Replies: 0
    • Views: 3,336
    10-30-2011, 11:36 AM Go to last post
  33. Joint hypothesis testing

    Hi, I am working on a 'quick' study on whether ex-ante probabilities predict the actual realized outcomes of sporting events. My model is ...

    Started by rotanho‎, 10-27-2011 04:35 PM
    • Replies: 4
    • Views: 5,142
    10-31-2011, 06:30 AM Go to last post
  34. Negative value of the constant term..?

    Hi, My name is Roy Klaassen, currently writing my master thesis in the field of marketing management (Tilburg University, the Netherlands). My...

    Started by roybooy‎, 10-31-2011 07:28 AM
    • Replies: 2
    • Views: 4,647
    10-31-2011, 08:10 AM Go to last post
  35. Interpretation of coefficient

    Hello, I am trying to interpret the results of a coefficient in a log-linear specification. I am trying to investigate the relationship between...

    Started by Slfwui‎, 11-01-2011 03:56 AM
    • Replies: 0
    • Views: 1,907
    11-01-2011, 03:56 AM Go to last post
  36. GLM Interpretation - confused.com

    Hi Folks, This may seem pretty straight forward to many of you but I'm could really do with some help. I'm using the generalized linear model to...

    Started by railway‎, 10-21-2011 10:00 AM
    • Replies: 3
    • Views: 3,122
    11-01-2011, 09:46 AM Go to last post
  37. Cubic polynomial regression - Correlation coefficient

    How to compute the Correlation Coefficient of third degree polynomial regression? Using R and Statgraphics I only get R2, wich I believe that is...

    Started by Fernando Andreacci‎, 11-01-2011 05:56 PM
    • Replies: 0
    • Views: 3,973
    11-01-2011, 05:56 PM Go to last post
  38. Arrow Is it possible to compare significance levels using a test?

    Hi guys! I have got a question and was hoping some smart guy here could help me out; I ran two regressions: Yt = c + Xt + Xt-1 + Ct + Yt-1 Zt =...

    Started by Tomassi‎, 11-01-2011 07:06 PM
    • Replies: 0
    • Views: 1,856
    11-01-2011, 07:06 PM Go to last post
  39. 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...

    Started by Elham‎, 10-30-2011 02:49 PM
    • Replies: 13
    • Views: 3,454
    11-02-2011, 01:36 PM Go to last post
  40. Theoretical question from Mixed Effects Random Coefficents Multilevel Linear Models

    hello people! this is kind of a theoretical question from people who've seen mixed-effects/random-coefficients/multi-level models before or have a...

    Started by spunky‎, 11-01-2011 02:15 PM
    • Replies: 6
    • Views: 2,845
    11-03-2011, 12:46 AM Go to last post
  41. ANCOVA and geography help

    For a GIS class project, I'm doing some research based on Christopher Rumh's 2000 paper Are Recessions Good for your Health? In it, he analyzes...

    Started by bryangoodrich‎, 11-02-2011 03:44 PM
    • Replies: 1
    • Views: 2,398
    11-03-2011, 03:09 AM Go to last post
  42. Regression Interpratation

    ..........

    Started by UCFstudent‎, 11-03-2011 09:36 AM
    • Replies: 1
    • Views: 2,116
    11-03-2011, 03:00 PM Go to last post
  43. Linear regression

    Little help please: A golf club manufacturer is trying to determine how the price of a set of clubs affects the demand for clubs. Below contains...

    Started by xwantedx‎, 11-04-2011 06:50 AM
    nonlinear, regression
    • Replies: 1
    • Views: 1,942
    11-04-2011, 07:15 AM Go to last post
  44. Logistic Regression

    For a transportation project analyzing the main effects, blocking effects of -Driving condition(3), message type(2) -AgeRange(3), gender(2) ...

    Started by jmess03‎, 11-04-2011 01:39 PM
    • Replies: 2
    • Views: 2,081
    11-04-2011, 04:14 PM Go to last post
  45. Orthogonal projection in regression analysis.

    Can someone explain what exactly you are trying to find when using orthogonal projection in regression analysis. I don't quite understand it. You are...

    Started by c2q‎, 11-04-2011 10:29 PM
    • Replies: 0
    • Views: 1,796
    11-04-2011, 10:29 PM Go to last post
  46. Interpretation of multiple linear regression model

    I have a regression that includes three continuous and nine categorical independent variables. One of the categorical variables has 6 values while...

    Started by vykngs1‎, 11-05-2011 10:15 PM
    • Replies: 2
    • Views: 2,383
    11-07-2011, 07:19 AM Go to last post
  47. Uncertainty on covariate

    Hi guys, I'm working on the links between road traffic noise and mental health using multilevel modelling (level 1 = individuals - level 2 =...

    Started by pandin‎, 11-07-2011 09:09 AM
    logistic uncertainty
    • Replies: 0
    • Views: 1,501
    11-07-2011, 09:09 AM Go to last post
  48. How do I test linearity of binomial data??

    - deleted double post -

    Started by KathiF‎, 11-07-2011 12:53 PM
    • Replies: 0
    • Views: 1,880
    11-07-2011, 12:53 PM Go to last post
  49. Interaction results

    We have two diagnostic fields (a primary one for most important analysis and secondary one for less important one). Both fields have the same exact...

    Started by noetsi‎, 11-07-2011 03:48 PM
    • Replies: 0
    • Views: 1,949
    11-07-2011, 03:48 PM Go to last post
  50. Univariate vs Multivariate Analysis, Quick Question

    Hey guys, I have a very quick question! I'm presenting a medical research paper and it uses univariate and multivariate analysis. Sometimes a...

    Started by THX‎, 11-05-2011 01:08 PM
    • Replies: 4
    • Views: 9,587
    11-07-2011, 04:32 PM Go to last post
  51. Regression verses ANOVA models

    Suppose you run both an ANOVA and a linear regression model on the same data using the same dependent variable and set of independent variables. The...

    Started by DeAnne Hunt‎, 11-07-2011 07:34 PM
    • Replies: 1
    • Views: 2,576
    11-07-2011, 08:03 PM Go to last post
  52. Combining variables in SPSS

    I want to combine two variables that have the same level of measurement (5-point scale) in a third one to use it in my regression model, how can I do...

    Started by Elham‎, 11-08-2011 09:02 AM
    • Replies: 0
    • Views: 3,024
    11-08-2011, 09:02 AM Go to last post
  53. coefficient discrepancies

    I am running a regression with 1 cont. ind. var and 1 cat. ind. var. There are 3 levels to the cat var so I have the lowest level set as the dummy...

    Started by shanehall.m‎, 11-08-2011 10:38 AM
    interact
    • Replies: 2
    • Views: 1,794
    11-08-2011, 04:00 PM Go to last post
  54. same variable: Single regression not stats sig but multiple regression stats sig?

    Evening, IMy statistical query is that I am conducting a multiple regression ( step down - ommitting the non significant variables one by one). I...

    Started by cousmathematics‎, 11-08-2011 12:00 PM
    • Replies: 2
    • Views: 3,968
    11-09-2011, 04:44 AM Go to last post
  55. Sxx from ANOVA output?

    Hi everyone, I have an upcoming test in Stats class. The professor has posted review questions but isn't responding to my questions. Below is a...

    Started by Sheesh19‎, 11-10-2011 10:55 AM
    • Replies: 2
    • Views: 9,115
    11-10-2011, 12:52 PM Go to last post
  56. Multiple Regression Question

    This is my data: Bars

    Started by student865‎, 11-10-2011 09:54 AM
    • Replies: 8
    • Views: 3,250
    11-10-2011, 02:17 PM Go to last post
  57. Data Question

    Ok I am trying to look at the relationship of sales

    Started by student865‎, 11-10-2011 01:51 PM
    • Replies: 5
    • Views: 1,974
    11-10-2011, 04:02 PM Go to last post
  58. Simple Linear Regression- need help!

    Ok I am trying to look at the relationship of sales

    Started by student865‎, 11-10-2011 07:41 PM
    • Replies: 1
    • Views: 1,638
    11-10-2011, 07:47 PM Go to last post
  59. Help to control on the size effect between two groups (small vz. big)

    Hello All, I would like to have your help to solve the size effect. Specifically, I have two group of companies listed on different markets....

    Started by Stata_user‎, 11-11-2011 11:30 AM
    • Replies: 6
    • Views: 2,894
    11-12-2011, 12:44 PM Go to last post
  60. Model building question-Is the researcher right?

    I'm thinking about a researcher who made the following statement about a model(upon criticism of his interpretation of the data). "There is a...

    Started by leavesof3‎, 11-09-2011 06:30 PM
    baseball, regression, research
    • Replies: 7
    • Views: 2,718
    11-13-2011, 05:22 PM Go to last post

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