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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Seasonality and dummy variables

Hey, I've got this econometric problem I could use some help with. I'm looking for day of the week effects in a certain index. I'm using a regression...

• Replies: 11
• Views: 8,539
11-23-2011, 05:30 AM
2. ### Beginner question

When I do a regression using monthly returns to get a beta using the CAPM, are the alpha and beta values also monthly? Thanks!

• Replies: 1
• Views: 1,871
11-23-2011, 04:06 AM

Hi all, for my master thesis I would like to investigate the human impact on behavior of sea lions. I have 3 different defined response variables...

• Replies: 10
• Views: 3,163
11-22-2011, 02:03 PM
4. ### binary logistic regression output

Hi there, running up against a brick wall with this. Please help! Using binary logistic regression in SPSS. For my dependent variable I have 200...

• Replies: 2
• Views: 2,002
11-22-2011, 11:20 AM
5. ### Testing the significance of the variance component of an itneraction effect...

hello peeps. so this is a question that i think anyone who works with R fitting mixed-effects linear models will find useful... i dont work around...

• Replies: 0
• Views: 2,355
11-20-2011, 03:52 PM
6. ### Moderated Multiple Regression versus Factorial ANOVA.

I am analyzing an interaction effect between two continuous independent variables (Z and X) on a continuous dependent variable (Y). I have...

• Replies: 4
• Views: 4,624
11-20-2011, 07:23 AM
7. ### Categorical variables and interaction in MLR

Would it be correct, to add in multiple linear regrression interaction between two categorical variables (i transformed them - dummy variavles) with...

• Replies: 9
• Views: 3,366
11-19-2011, 04:14 PM
8. ### Cross sectional Regression Analysis

Hi, I am a currently doing my coursework on the factors impacting on the dividend policy in the financial sector in Mauritius. The problem is that...

• Replies: 1
• Views: 2,453
11-19-2011, 01:23 PM
9. ### Regression prediction question

My question is how do we get the 16, the one I have circled.

• Replies: 2
• Views: 2,559
11-18-2011, 05:18 PM
10. ### multigroup regression and interaction effects

Goal: Cross cultural research to validate the EAS measurement tool (see below). Two tools: EAS with 7 descriptive dimensions, each dimension...

• Replies: 1
• Views: 1,943
11-17-2011, 10:51 PM
11. ### How to credibly downweight imputed values?

Hi All, First post here. I've googled all around trying to find an answer to my question, but I can't seem to find one, and pencil and paper isn't...

• Replies: 1
• Views: 2,571
11-17-2011, 10:38 PM
12. ### Question about coefficient change

Hi guys, I'm completely stuck with my statistical analysis so I was hoping you guys could help me out. This is the case: I did a research...

• Replies: 2
• Views: 2,288
11-17-2011, 10:33 PM
13. ### how to calculate the significance of an R2 increase (based only on results in paper)

Recently I have come across several articles that report OLS results of models with increasing numbers of variables. In the articles the R2 and...

• Replies: 19
• Views: 21,769
11-17-2011, 09:27 AM
14. ### Logistic Regression: model selection and interpretation

Good Day!! Hi I am working for the first time with logistic regressions and I have some doubts about the model selection and the result that is...

• Replies: 3
• Views: 5,442
11-16-2011, 03:17 PM
15. ### Regression equation

my question is where did 105.9 and 13.1 come from??? and Where did the R 0.814 come from??

• Replies: 1
• Views: 2,423
11-14-2011, 10:43 PM
16. ### Regression suitability question

Hello, Could anyone help me out with some pointers please? I'm looking to use some statistics to help predict student % school absence rates...

• Replies: 4
• Views: 3,912
11-13-2011, 06:00 PM
17. ### 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...

• Replies: 7
• Views: 2,704
11-13-2011, 05:22 PM
18. ### 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....

• Replies: 6
• Views: 2,883
11-12-2011, 12:44 PM
19. ### Simple Linear Regression- need help!

Ok I am trying to look at the relationship of sales

• Replies: 1
• Views: 1,634
11-10-2011, 07:47 PM
20. ### Data Question

Ok I am trying to look at the relationship of sales

• Replies: 5
• Views: 1,958
11-10-2011, 04:02 PM
21. ### Multiple Regression Question

This is my data: Bars

• Replies: 8
• Views: 3,244
11-10-2011, 02:17 PM
22. ### 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...

• Replies: 2
• Views: 9,086
11-10-2011, 12:52 PM
23. ### 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...

• Replies: 2
• Views: 3,958
11-09-2011, 04:44 AM
24. ### 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...

• Replies: 2
• Views: 1,791
11-08-2011, 04:00 PM
25. ### 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...

• Replies: 0
• Views: 3,021
11-08-2011, 09:02 AM
26. ### 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...

• Replies: 1
• Views: 2,567
11-07-2011, 08:03 PM
27. ### 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...

• Replies: 4
• Views: 9,562
11-07-2011, 04:32 PM
28. ### 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...

• Replies: 0
• Views: 1,941
11-07-2011, 03:48 PM
29. ### How do I test linearity of binomial data??

- deleted double post -

• Replies: 0
• Views: 1,875
11-07-2011, 12:53 PM
30. ### 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 =...

• Replies: 0
• Views: 1,497
11-07-2011, 09:09 AM
31. ### 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...

• Replies: 2
• Views: 2,378
11-07-2011, 07:19 AM
32. ### 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...

• Replies: 0
• Views: 1,792
c2q
11-04-2011, 10:29 PM
33. ### Logistic Regression

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

• Replies: 2
• Views: 2,073
11-04-2011, 04:14 PM
34. ### 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...

• Replies: 1
• Views: 1,929
BGM
11-04-2011, 07:15 AM
35. ### Regression Interpratation

..........

• Replies: 1
• Views: 2,104
11-03-2011, 03:00 PM
36. ### 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...

• Replies: 1
• Views: 2,389
11-03-2011, 03:09 AM
37. ### 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...

• Replies: 6
• Views: 2,836
11-03-2011, 12:46 AM
38. ### 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: 3,447
11-02-2011, 01:36 PM
39. ### 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 =...

• Replies: 0
• Views: 1,848
11-01-2011, 07:06 PM
40. ### 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...

• Replies: 0
• Views: 3,954
11-01-2011, 05:56 PM
41. ### 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...

• Replies: 3
• Views: 3,106
11-01-2011, 09:46 AM
42. ### 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...

• Replies: 0
• Views: 1,892
11-01-2011, 03:56 AM
43. ### 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...

• Replies: 2
• Views: 4,626
10-31-2011, 08:10 AM
44. ### 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 ...

• Replies: 4
• Views: 5,113
10-31-2011, 06:30 AM
45. ### 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...

• Replies: 0
• Views: 3,315
10-30-2011, 11:36 AM
46. ### Dynamic Regression

Can we determine dominant factors using dynamic regression model?

• Replies: 0
• Views: 1,566
10-29-2011, 10:36 PM
47. ### Autocorrelation/Regression

Post deleted

• Replies: 4
• Views: 3,028
10-29-2011, 09:58 AM
48. ### 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...

• Replies: 1
• Views: 1,493
10-29-2011, 07:42 AM
49. ### 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...

• Replies: 2
• Views: 1,575
10-29-2011, 07:38 AM
50. ### 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...

• Replies: 0
• Views: 2,927
10-29-2011, 07:34 AM
51. ### 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...

• Replies: 2
• Views: 2,991
10-28-2011, 01:20 AM
52. ### 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:...

• Replies: 2
• Views: 4,007
10-27-2011, 08:06 AM
53. ### 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...

• Replies: 0
• Views: 1,577
10-27-2011, 07:28 AM
54. ### 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,...

• Replies: 3
• Views: 1,952
10-26-2011, 05:51 PM
55. ### 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...

• Replies: 1
• Views: 2,315
10-26-2011, 02:41 PM
56. ### 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...

• Replies: 9
• Views: 4,307
10-26-2011, 01:08 PM
57. ### 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....

• Replies: 4
• Views: 5,093
10-25-2011, 10:09 AM
58. ### 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...

• Replies: 9
• Views: 2,545
10-24-2011, 03:49 PM
59. ### 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...

• Replies: 2
• Views: 1,957
10-24-2011, 03:24 PM
60. ### 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 =

• Replies: 3
• Views: 3,632
BGM
10-24-2011, 12:55 PM

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