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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### How exactly does MLR hold other things constant?

Hi all, I have just signed up to the forum and I am quite inspired by the discussions. I have an intermediate level experience in statistics...

• Replies: 2
• Views: 2,982
09-17-2013, 09:46 AM
2. ### SVAR parameter standard errors

Hi everyone, How to calculate the standard errors of SVAR parameters. I know how to estimate it for contemporaneous parameter. I want to know how...

• Replies: 2
• Views: 2,978
11-18-2014, 09:27 AM
3. ### Interaction term

Hi, I'm running linear regressions (1) Y = a + b and (2) Y = a + b + axb The coefficients for a and b in (1) have positive signs which are...

• Replies: 3
• Views: 2,976
dou
05-23-2011, 04:49 AM
4. ### Stupid Q: Interpretation of slope in OLS

Hi ppl I'm running a bunch of regressions on a series of stock returns (decimal values). One of the models is: r_t = a0 + b1*rm_t + e ...

• Replies: 4
• Views: 2,975
10-07-2011, 12:02 PM
5. ### Logistic Regression predicted probability is either 1 or 0 (or literally 2.2204E-16)

I am doing a test logistic regression to predict whether employees will stay in the company for more than 3 years. After the model is trained, the...

• Replies: 11
• Views: 2,975
01-03-2016, 01:28 PM
6. ### Multinomial hierarchical logistic regression

Hi everyone! I am wondering if anyone could help me to understand multinomial logistic regression. I am trying to do similar hierarchical...

• Replies: 1
• Views: 2,974
09-05-2011, 05:42 AM
7. ### Regression & Predictions

I have a problem to work out involving forecasting/predicting: Given multiple data sets (variables), I need to evaluate which set is the best...

• Replies: 1
• Views: 2,972
11-26-2007, 04:10 AM
8. ### Principal component analysis before regression anallysis

Hi this is my first post and i've searched for this answer in vain. I have 50 participants in an experiment i conducted and i want to use a...

• Replies: 3
• Views: 2,972
03-31-2012, 10:22 AM
9. ### Generalised Least Squares VS Multilevel Modeling...

hello guys! i've been trying to wrap my head around this question for a while... if i understand things correctly, generalised least squares (GLS) is...

• Replies: 3
• Views: 2,971
05-18-2011, 09:18 PM
10. ### Split sample regression vs Regression with interaction term

Hi, I need some advice on using split sample regression versus regression with interaction term. My objective is to tell the difference, if any,...

• Replies: 0
• Views: 2,969
12-12-2014, 12:08 PM
11. ### Review Methodology

Hello, I'm about to embark on some mutivariate regression analysis for my company but it's been a while since I've used these methods. The outputs...

• Replies: 3
• Views: 2,968
08-18-2010, 04:39 PM
12. ### SPSS multiple regression????

I want to do a multiple regression , correlating offspring produced on mating one with offspring produced on mating two also with male age at the...

• Replies: 0
• Views: 2,967
04-01-2009, 07:24 AM
13. ### Reference for max vars in a model

I used 7 predictor variables in a regression model with a sample size of 103. Someone who reviewed my manuscript said that was too many predictors. ...

• Replies: 2
• Views: 2,967
01-11-2011, 02:07 AM
14. ### how to draw a logistic curve in word, excel etc

Hello, I am working on a binary logistic regression and would like to insert the logistic sigmoid curve. do you know how to draw such a curve in...

• Replies: 0
• Views: 2,967
02-14-2015, 08:32 PM

Hi all, I've never really understood the concept of "link functions". Is anyone able to point me in the right direction of something that could...

• Replies: 1
• Views: 2,964
04-12-2011, 05:51 AM
16. ### Interpreting mean centered polynomial regression

Hi, I'm running a simple OLS regression and want to examine non-linear effects. Therefore I have included a square term of the independent...

• Replies: 0
• Views: 2,964
02-21-2012, 02:56 PM
17. ### What test can I use to find out which bivariate regression is *significantly* better?

I have three variables: y, x1 and x2 (n=130). I want to know whether one of the x variables is a significantly better bivariate predictor than the...

• Replies: 3
• Views: 2,960
02-16-2011, 01:49 PM
18. ### Combining linear regressions

I have two variables, x and y, and I am using linear regression to predict y from x over a large set of subjects. There are multiple observations per...

• Replies: 0
• Views: 2,957
aix
06-01-2010, 02:48 PM
19. ### What econometric method for macroeconomic trade data?

Hello, I am working with a data set with trade data of one specific good of 173 countries from 1990 to 2010 in STATA. For every year and a pair of...

• Replies: 3
• Views: 2,955
10-01-2013, 08:57 AM
20. ### Time series or just repeated measures?

Hi All, I have data on 7 clusters (ie, sites). The date are monthly counts (there is no zero inflation in most of the outcomes of interest...most...

• Replies: 0
• Views: 2,954
04-14-2011, 09:14 PM
21. ### Linear regression- If you ever wanted a chance to save somebody's life...this is it!

Hi guys, I will be forever grateful for some help with SPSS and linear regression. Here is my data set: -I have questionnaire data from...

• Replies: 1
• Views: 2,952
04-02-2010, 06:10 PM
22. ### Regression Variable (Only Applicable to Certain Cases)

Hi, I'm doing a multiple linear regression. One of the variables I am using is a continuous numerical variable, however, it only applies to about...

• Replies: 1
• Views: 2,949
03-27-2011, 08:47 PM
23. ### Very basic questions on some terms.

I apologize if this is a little too basic for you, but I'm an RN taking statistics ovr the summer and my brain just doesn't work like this. My...

• Replies: 6
• Views: 2,948
07-13-2008, 07:25 PM
24. ### Weightings Problem

I have been given an EXCEL model and my assigned task is (only) to fix it for problems that I might call "unintended consequences" of the underlying...

• Replies: 4
• Views: 2,947
07-19-2007, 02:33 PM
25. ### Should I transform my scores?

I am using correlation scores as the dependent variable in a multiple regression e.g. I am looking at which personality factors predict how well...

• Replies: 0
• Views: 2,946
02-01-2010, 06:29 AM
26. ### P-value for a regression where expected slope is 1:1

Hi, I am comparing two values for vegetation cover from two time periods. The expected value is y=x for the slope. I am curious how to calculate a...

• Replies: 6
• Views: 2,945
11-26-2016, 09:40 AM
27. ### Regression Analysis Help

Hi All, first post here, glad to be part of this forum. After surveying my population, I am currently experimenting what factors (about 10...

• Replies: 4
• Views: 2,944
09-04-2010, 04:36 PM
28. ### Output of Cox regression in SPSS

Hi! When i ran cox regression model with categorical variables having more than 2 classess what does the first sig. value mean? For ex. ...

• Replies: 0
• Views: 2,943
09-02-2013, 04:55 AM
29. ### Comparing Regression Slopes Across 3 Groups - SPSS

I am running a simple regression with one dependent variable and one independent variable but splitting the results by group (3 groups). So, I am...

• Replies: 4
• Views: 2,942
01-04-2014, 05:47 PM
30. ### Standard Regression Analysis / urgent help for stats beginner.

Hi Guys! I'm fairly new to statistics and am conducting a standard regression analysis with 1 predictor variable ( following from a pearsons...

• Replies: 5
• Views: 2,942
11-22-2016, 12:57 PM
31. ### Need your help with AIC and model selection

Hello. If someone could help me with this problem, I would really appreciate it!! I am working on multiple Mantel tests (like multiple regression)....

• Replies: 1
• Views: 2,941
12-06-2007, 02:14 PM
32. ### 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: 2,940
10-28-2011, 01:20 AM
33. ### Random Regression Analysis

I posted this in the R forum, which was the incorrect place to put this I think. I have a set of data that includes: 15 repeated measures for...

• Replies: 0
• Views: 2,939
02-06-2012, 02:09 PM
34. ### Error Propagation in Multivariable Regression

I've spent all day reading Matlab tutorials and can't seem to find anything about propagating error in regression analysis. I have a set of x and y...

• Replies: 0
• Views: 2,937
04-20-2011, 05:41 PM
35. ### choosing β0 and β1 to minimize the residual sum of squares

I'm reading a book called , and I have a question in regards to the material inside. I understand that we can find the residual sum of squares by...

• Replies: 0
• Views: 2,937
07-26-2014, 11:53 PM
36. ### Logistic Regression - Predicted Probabilities with unknown variables

Hi all, I'm wondering about how to calculate predicted probabilities using a binary logistic regression model when one or more of the variables in...

• Replies: 2
• Views: 2,936
12-07-2016, 10:11 AM
37. ### Is this possible?

I have found some scientific papers in which a spline regression is performed with a categorical dependent (death) and a continuous predictor. In the...

• Replies: 2
• Views: 2,935
08-14-2010, 11:28 AM
38. ### Regression or LSD for discrete quantitative factor?

I have a 2-factor factorial experiment where Factor A is quantitative and continuous with 2 levels (100 and 200). Factor B is quantitative, but...

• Replies: 0
• Views: 2,934
12-28-2009, 12:55 PM
39. ### Std deviation of correlation coefficient?

Hi I've run a VAR model to find the correlation coefficient between two stock markets. Now I need to find the standard deviation of this...

• Replies: 1
• Views: 2,934
07-27-2011, 07:29 PM
40. ### multilevel modelling: predicting random effects for new clusters

Hi: I have a query I'm hoping someone may be able to help with. I've chatted to a few people and looked at texts and the literature but haven't...

• Replies: 9
• Views: 2,934
04-28-2015, 11:13 AM
41. ### How to approach model selection

Hi, This is my first formal attempt at a regression analysis that we hope to write up and submit. Basically we're wanting to investigate the effect...

• Replies: 4
• Views: 2,931
05-21-2011, 02:07 AM
42. ### Hypothesis Testing in Regression

I have fit a multilinear regression with response Y and predictors x1, x2, x3, x4 and x5. I have constructed a hypothesis i wish to test. The null is...

• Replies: 5
• Views: 2,931
05-07-2013, 11:58 PM
43. ### Regression involving likert scale response

Hi, I am trying to carry out regression analysis. I would like my dependent variable to be a Yes/No type, and my independent variables to be...

• Replies: 8
• Views: 2,926
10-09-2013, 08:57 PM
44. ### pearson correlation with linear regression scenario please!

I was wondering if anyone could give me an example of a pearson correlation with linear regression scenario?

• Replies: 1
• Views: 2,924
07-27-2011, 05:22 PM
45. ### Interpretation of Marginal effects in Tobit model

hi ,,,, i have estimated censored regression model and also estimated the marginal effects after log transformation of dependent variable. guide...

• Replies: 0
• Views: 2,923
12-14-2013, 10:27 AM
46. ### Spanning test with short sales constraints - how does it works?

Dear all, I need to perform a spanning test with short sales constraint to assess the diversification potential of microfinancial assets. I red...

• Replies: 0
• Views: 2,921
03-21-2011, 01:55 PM
47. ### multiple comparison issue in linear regression

I am puzzled by the following question: If you have a 3-level categorical predictor in a linear regression model, you will get 2 estimated...

• Replies: 0
• Views: 2,920
11-05-2008, 04:41 PM
48. ### GEE and sample size

Hello, I'd like to know how to correct for small sample size in GEE.

• Replies: 1
• Views: 2,920
12-07-2011, 03:44 PM
49. ### Type 1 error in regression with entire populations

I have read that you are not supposed to keep choosing different levels of the categorical variable to be the reference level, because this can cause...

• Replies: 14
• Views: 2,915
10-15-2016, 10:50 AM
50. ### 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: 2,913
BGM
07-13-2011, 04:20 AM
51. ### 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: 2,913
10-29-2011, 07:34 AM
52. ### Assessing the relationship between a continuous variable and categorical variables

Hello! I have a problem for which I have trouble finding a solution. I would like to assess the relationship between a continuous dependent...

• Replies: 2
• Views: 2,913
09-09-2013, 12:20 PM

Currently, I'm trying to create a regression equation that can help my boss predict employee hours for the upcoming month. Basically, if we already...

• Replies: 3
• Views: 2,912
06-25-2010, 01:54 PM
54. ### robust regression estimators

Hi everyone. I have studied the robust regression a few weeks ago and I want to have a lot of insight about it. After reading some sources, I know...

• Replies: 2
• Views: 2,912
01-30-2017, 11:00 AM
55. ### Multi linear regression

Hello everyone, I am new here (and to stats in general). Anyway I am working on a project where I want to predict the value of an outcome and I...

• Replies: 7
• Views: 2,911
01-26-2012, 12:57 PM

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