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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Beta regression 1 and 0 values

Hi there, I am trying to carry out beta regression but some of the realitzationsof my response varaible are 0 and 1 values and hennce I cannot...

• Replies: 5
• Views: 3,384
05-28-2012, 08:47 AM
2. ### CARs from small sample(26): Which Regression is the best to perform?

Dear All, I am new to this forum, but I am trying to become more and more specified in statistics for my Master Thesis (Erasmus University...

• Replies: 5
• Views: 3,381
07-23-2012, 02:13 PM
3. ### Can I use mediation with my data?

Thanks for taking the time to read this in advance it is quite detailed, but I'm currently working on my psychology honours dissertation, and due to...

• Replies: 2
• Views: 3,379
09-13-2009, 01:27 AM
4. ### Regression and metric space

Hi, I have two independent variables X and Y and one dependent variable Z. X alone explains 45 percent of the variation in Z (Rsquare) and Y...

• Replies: 0
• Views: 3,378
10-29-2007, 03:40 PM
5. ### difference between 2x2-table and binary logistic regression

Hello, I have to find out what is the (conceptual) difference between the tests. I don't really know what my means. I know they ARE different, but...

• Replies: 4
• Views: 3,376
01-27-2012, 01:54 PM
6. ### Mediation Output with Process

Hi, I am investigating a variable for its effect as a mediator with SPSS and Process but I have problems interpreting the output. First I...

• Replies: 0
• Views: 3,374
01-10-2017, 08:08 AM
7. ### linear regression Johnson Transformation

If two predictor variables transformed by the Johnson Transformation (see Minitab or Johnson 1949) are used in separate linear regressions (assuming...

• Replies: 1
• Views: 3,367
01-02-2013, 10:59 AM
8. ### what test should be used to tell if two regression lines are significantly different

I have two lines in a x-y plot 1. observed migration distance (y) and predicted migration distance (x) (Y=0.95X+0.31, the slope coefficient and the...

• Replies: 4
• Views: 3,361
04-29-2013, 02:26 PM
9. ### Linear Regression - Theory

Hi Guys, I have some theoretical questions about regression models, I need an answer or true or false for the next few phrases.... 1. Leverage...

• Replies: 3
• Views: 3,359
03-16-2011, 03:16 AM
10. ### Poisson Rate Regression: Offset?

Hi! I'm comparing two groups on the # of hospitalizations they have in a 5 year period. Length of hospitalization stay is highly variable. For...

• Replies: 3
• Views: 3,351
06-21-2012, 07:11 AM
11. ### How to derive the r squared of an interaction term within a model

Hi there, I am using Hayes' (2013) PROCESS macro to run a simple moderation, and I have the R-sq for the entire model. (M moderates the...

• Replies: 4
• Views: 3,349
03-03-2014, 03:18 PM
12. ### 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: 3,344
11-19-2011, 04:14 PM
13. ### Is it a sensible practice to collapse categories of a predictor?

I used logistic regression to run a model. An explanatory variable called 'region' has 3 levels (1, 2, 3). Level 3 is the reference group. The...

• Replies: 2
• Views: 3,342
09-07-2011, 10:07 AM
14. ### non-linear regression time response model

Hi I need to choose a non linear regression model for, protein phosphorylation over time response, for this kind of data Is not like enzyme...

• Replies: 5
• Views: 3,340
05-19-2012, 09:05 AM
15. ### Reading Binary Logistic Regression results

Hi! Need some help on Binary Logistic Regression results interpretation. 1) On Block 0: Begining Block i have overall percentage of 76%, but...

• Replies: 4
• Views: 3,339
09-13-2013, 08:10 PM
16. ### Multiple logistic regression intercept

Hello guys and gals, I'm having a me***own trying to understand exactly what the intercept of a multiple logistic regression is telling me/ or if...

• Replies: 3
• Views: 3,338
03-13-2012, 12:29 AM
17. ### Interaction Between Quadratic Variables in Logistic Regression

Hi, I got some questions about assumption and interpretation of conditional logistic regression. It seems that two of my variables (let says N and...

• Replies: 0
• Views: 3,336
STG
04-18-2011, 07:42 AM
18. ### multiple comparisons with multiple regressions?

Hi there, I'm hoping that someone can answer my query or point me in the direction of a reliable source to find out more. My question is - Is the...

• Replies: 3
• Views: 3,334
05-27-2008, 08:36 AM
19. ### Dependent variable kurtosis

How important is it for the Dependent Variable in a multiple regression to show normal distribution? I have read apparently contradictory...

• Replies: 2
• Views: 3,334
05-03-2009, 06:01 PM
20. ### regression, interactions and centering how does it work?

Hello everyone! So yesterday our prof explained to us that one of the reasons of why you "center" (meaning you substract the mean) from your...

• Replies: 11
• Views: 3,334
04-19-2013, 07:46 PM
21. ### Poisson GLM with identity link function

Hi, I'm trying to understand GLM, and was wondering why one should want to use an identity link function (for example with Poisson regression)....

• Replies: 0
• Views: 3,332
08-26-2012, 06:43 AM
22. ### Prediction Limits

Morning everyone. First thread, so take it easy on me. I am using a holt-winters times series to predict future call and transactional volume. ...

• Replies: 0
• Views: 3,330
09-03-2008, 06:48 AM
23. ### Post Hoc or Contrasts ?

Hi Guys, I have a theoretical question... Someone asked me today what's better to perform while using Analysis of variance: a prior analysis...

• Replies: 1
• Views: 3,327
03-13-2011, 03:59 AM
24. ### My GRS statistic value is coming out to be weird.

I am calculating GRS F-statistic on excel. Howeve rthe value is coming out to be either veyr big in trillions or too small. I guess the problem...

• Replies: 0
• Views: 3,327
09-21-2011, 06:48 AM
25. ### Relative regression analysis?

Hi, I am a new member of this thread. I need help with my hypothesis testing. Simply put, my hypothesis is " As A goes up, B and C go up but B...

• Replies: 7
• Views: 3,327
05-06-2013, 01:29 PM
26. ### Do my data meet the assumptions for multiple linear regression?

~ There are no outliers in the standard residuals ~ Multicollinearity is not a concern ~ Independent errors are met (Durbin-Watson = 1.95) ~...

• Replies: 7
• Views: 3,317
01-23-2014, 08:12 AM
27. ### Can RSS be decreased to 0 when dimension increases?

Let's consider a simple example: I have two attributes X1 and X2, each has n values; response variable is Y. Using the two attributes together to...

• Replies: 7
• Views: 3,309
12-11-2011, 01:07 AM
28. ### WLS Regression Weights

I am working on a problem for which I need to do a multiple regression that involves a dependent variable and two independent variables. The...

• Replies: 0
• Views: 3,306
06-16-2012, 02:08 PM
29. ### GJR GARCH in Stata

Hello, I am doing a research paper on finding the asymmetric volatility 14 stock indexes from around the world, and for this I am using EGARCH...

• Replies: 0
• Views: 3,304
08-28-2012, 12:36 AM
30. ### Make predictions with standardized coefficients

Hello, I've been struggling with a problem since a while, hopefully someone here could help me out. The problem: I want to use the...

• Replies: 4
• Views: 3,298
08-21-2012, 08:05 PM
31. ### Crossing point

Dear all, My question is How to find out the crossing point of two curve in a graph by using r software? Mr.S.Sivarajah

• Replies: 2
• Views: 3,298
08-21-2013, 09:11 AM
32. ### Relative impact of regressors on Y.

A question I get asked a lot is, if we have these three predictors of Y, which of the 3 has the most, next most and least impact. I have tried...

• Replies: 12
• Views: 3,298
08-07-2017, 07:31 PM
33. ### Independence of irrelevant alternatives test

Hi, I'm looking for to test to see if my logistic regression model violates the independence of irrelevant alternatives assumption. The most often...

• Replies: 0
• Views: 3,291
09-15-2011, 10:47 AM
34. ### Using Weight Of Evidence (WOE) in scoring

Hi, I'm a newcomer to scorecards and I am trying to build one by performing univariate analysis to test for predictive strength of each of my...

• Replies: 0
• Views: 3,289
06-12-2012, 07:04 AM
35. ### Hausman test VS Mundlak model; choosing between fixed-effects and random-effects

I am using panel data and I have to choose between fixed-effect and random-effect models. I run the Hausman test, the H0 (i.e., the difference in...

• Replies: 0
• Views: 3,289
04-09-2014, 10:05 AM
36. ### regression, pairs of random variables

with observations of an x variable, and a y variable whose expected values lie on a straight line, and whose residual errors are normally...

• Replies: 0
• Views: 3,287
08-06-2006, 12:25 PM
37. ### Testing arbitrary contrasts based on summary statistics

Following the discussion in this recent thread (Getting F statistic from multiple t-statistics?) and spunky's request therein, here is a neat trick...

• Replies: 3
• Views: 3,287
07-24-2012, 07:55 PM

Hey everyone, Does anyone know the steps that minitab or any other stats software does to eliminate variables when doing forward selection,...

• Replies: 0
• Views: 3,285
04-01-2011, 05:37 PM
39. ### Interpreting interaction between dummy IV and continuous moderator with log DV

Hello Community, I urgently need your help to read the results of my regression analysis for my master thesis, which I need to hand in next week....

• Replies: 13
• Views: 3,285
08-02-2013, 09:18 AM
40. ### Mediation Analysis with Dichotomous Outcomes - Effect Size for Indirect Effect

Hello, I would like to run a mediation analysis where my predictor (X) is continuous, my mediator (M) is continuous, but my outcome variable (Y)...

• Replies: 0
• Views: 3,284
04-14-2014, 02:39 PM
41. ### regression and correlation

Hello, correlation between two variables is positive (and significant) and then when I put it in regression analysis it becomes negative predictor...

• Replies: 1
• Views: 3,283
04-08-2011, 05:15 AM
42. ### compare Spearman's correlations

Dear all, I performed several Spearman's correlation tests between the same independent variable and different dependent ones. All the...

• Replies: 2
• Views: 3,283
12-06-2011, 05:07 AM
43. ### Regression sample size

Members, Please let me know if i can do a regression analysis for a sample size 40 with 8 predictor variables?

• Replies: 5
• Views: 3,282
01-24-2013, 05:24 AM
44. ### Obtain the least squares estimator b1 of B1.

Given the regression model Yi=B1Xi + ei for i=1,2,...,n. Is the estimator unbiased? So this represents the simple model with B0=0, but I'm not...

• Replies: 6
• Views: 3,281
09-23-2013, 04:32 AM
45. ### Logistic regression: how to get ORs and CIs for non-included variables

I'm working on a modeling project using logistic regression with forward selection. I would like to be able to determine the odds ratios and...

• Replies: 8
• Views: 3,279
12-01-2013, 09:18 PM
46. ### 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: 3,277
10-30-2011, 11:36 AM
47. ### normality assumption in regression: THE FINAL ANSWER!!!

ok, maybe it's not *the* final answer, but here's a theory of where this may be coming from. ever since noetsi started asking this question about...

• Replies: 11
• Views: 3,276
07-02-2013, 09:48 AM
48. ### Generalized Cross Validation

Hello Guys, I'm runing MATLAB code on SVD with roughness penalties. When I use GCV to choose the parameter, I have a question regarding the...

• Replies: 0
• Views: 3,273
04-05-2011, 08:04 AM
49. ### Partialling out covariates

Hi, I have a situation where I have Y_it = a_i + dT_it + X'_itB + e_it T is multi-valued and exogenous. It is correlated with some of the...

• Replies: 1
• Views: 3,272
12-20-2011, 05:18 PM
50. ### Variance of error

With the equation yi = B0 + B1xi + ei Does anyone know what the variance of ei_hat is suppose to equal? So far I have tried to split it the ei...

• Replies: 0
• Views: 3,267
08-08-2011, 01:15 AM
51. ### Linear Model Prediction

I'm working on a linear model that looks like: Price = B0 + B1(Gender) + B2(Age) + B3(Credit Type) + B4(Home) ... The predictior is price, and...

• Replies: 13
• Views: 3,266
12-21-2011, 11:06 AM
52. ### What test if no linearity

Dear forum members, I am currently struggling with my research about boardmembers and their influence on the strategy. From other articles I...

• Replies: 20
• Views: 3,265
11-18-2013, 04:15 PM

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