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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. Problem with replicating a paper

I'm having some trouble at replicating this paper (text here: http://www.michiganjb.org/issues/52/text52c.pdf) The paper wants to assess the economic...

• Replies: 0
• Views: 769
04-28-2016, 04:29 AM
2. Writing down firth logistic regression equation

Hi, This is a really simple question that I'm sort of embarrassed I can't answer - how would you write down a firth logistic regression? Now to...

• Replies: 6
• Views: 1,581
04-27-2016, 12:59 PM
3. GLS (Generalized least Squares) STATA

generalized least squares (GLS) is a technique for estimating the unknown parameters in a linear regression model. GLS (Generalized least Squares)...

• Replies: 0
• Views: 1,803
04-27-2016, 05:16 AM
4. Regression with stratified data: What to do?

Hi, I want to model a bird population in a country via regression analysis (Poisson regression due to count data). In order to optimize the...

• Replies: 0
• Views: 1,304
04-27-2016, 03:39 AM
5. Minimum number of cases for the reference level

Before I ask this I have the true population so I am not sure this issue even applies :p Is there a minimum number of cases the reference level...

• Replies: 7
• Views: 1,512
04-26-2016, 03:59 PM
6. Regression to compare mean differences?

Hi everyone, I am doing a project with two different groups (clinical and control). I want to compare their scores on a couple of variables (ex:...

• Replies: 1
• Views: 1,426
04-26-2016, 06:23 AM
7. Multiple, hierarchal regression - division of p-value?

Hey everybody! I am pretty new to this forum and also to statistics. In these days I try to analyze the data for my Bachelor thesis. I study...

• Replies: 0
• Views: 962
04-26-2016, 01:34 AM
8. zero value of the regression parameter

Hello. I would like to ask if anyone knows a website with the theme: regression testing parameter. I need only theory on the topic (to school). Just...

• Replies: 5
• Views: 1,309
04-25-2016, 09:33 PM
9. Cochrane Orcutt Eviews 9

Cochrane Orcutt estimation is a procedure in econometrics, which adjusts a linear model for serial correlation in the error term. It is named after...

• Replies: 0
• Views: 2,585
04-24-2016, 09:57 PM
10. Multiple Regression with Ratio as Independent Variable

I am doing a multiple regression and want to use a ratio (number of support staff to number of students) as an independent variable. Does dividing...

• Replies: 0
• Views: 897
04-24-2016, 09:48 PM
11. Positive Pearson Correlation but negative coefficient

Dear All I am trying to create a regression model for estimating electricity demand. The independent variables considered are population and GDP....

• Replies: 0
• Views: 1,376
04-24-2016, 07:39 PM
12. Newbie in trouble (is regression the right way to go here?)

Hi there! (background, skip if wanted) New member here. Finance student with an exciting area to write a paper about but I have not taken any...

• Replies: 0
• Views: 1,520
04-21-2016, 04:36 AM
13. Likert Scale as dependent variable

Hi all, I have a question regarding the analysis of my survey data. I have created one variable of seven likert scale variables after conducting...

• Replies: 9
• Views: 2,785
04-20-2016, 04:11 PM
14. Linear regression with all categorical variables SPSS

Hello, I am running a multivariate regression analysis on the presence of an organism in an infection (dependent variable), and certain risk factors...

• Replies: 4
• Views: 854
04-20-2016, 12:49 PM
15. Regression Misconceptions

Dear all, Just wanted to clear some misconceptions I have about regression analysis. Your help would be highly appreciated :) 1) One of the...

• Replies: 1
• Views: 1,134
04-19-2016, 03:17 PM
16. Factor scores as independent variables in multiple regression

I'm checking that I have understood this right. Factor scores must be achieved via oblique rotation, because factor scores must be allowed to...

• Replies: 0
• Views: 786
zxc
04-19-2016, 11:25 AM
17. Can covariates be random variables? (logit)

Hi Everyone. I have been discussing a project at work. My colleague said that he is going to estimate a logit model and include as a covariates...

• Replies: 5
• Views: 1,820
04-18-2016, 05:32 PM
18. Confounder confounds at only one level of polytomous variable

Hello! I have looked for a post on this but have been unsuccessful. It would be great if you could help. I am using logistic regression in SAS. ...

• Replies: 0
• Views: 929
rkw
04-16-2016, 06:35 PM
19. Question about dummy variables

Hi Guys, So I am doing a project for a class, and had a question on how to interpret something on my SPSS. I am designing a multivariate regression...

• Replies: 0
• Views: 1,118
04-16-2016, 10:47 AM
20. Using weights in regression

I don't really understand this argument. I thought you had to use weights in regression always when you were not randomly sampling. But this argues...

• Replies: 2
• Views: 1,650
04-15-2016, 02:12 PM
21. Is correction for attenuation in my regression analysis necessary?

Hi everyone, I'd like to know if I should consider a correction for attenuation in a multiple regression I'd like to run on my data. Here's...

• Replies: 7
• Views: 2,050
04-15-2016, 04:39 AM
22. Relative impact of predictors in linear regression

I want to rank variables from most to least important, in terms of impact on the DV. My predictors are either interval or dummy. My DV is interval. I...

• Replies: 8
• Views: 2,491
04-14-2016, 09:02 AM
23. Generating random estimates

I have 5 years worth of actual monthly data. I want to "predict" (examine really) possible values 12 months into the future. I don't want to be...

• Replies: 0
• Views: 1,052
04-13-2016, 03:55 PM
24. Seemingly unrelated regression in R with many variables

Hey! I'm sitting here with a data frame with over 100 variables and I'm supposed to model my 8 dependent variables with seemingly unrelated...

• Replies: 0
• Views: 1,276
04-13-2016, 07:08 AM
25. A purely conceptual question

Assume a logisitc regression model includes a continuous variable like age and a categorical variable like gender and an interaction term for these. ...

• Replies: 0
• Views: 1,038
04-12-2016, 05:30 PM
26. Comparison of regression coefficients between (nested) geographic regions

Hi All, I would like to compare the effect of an explanatory variable (say X1) on a response variable (Say Y) between two geographic regions in...

• Replies: 0
• Views: 1,426
04-11-2016, 08:54 PM
27. Is this a sensible approach for a 3x3 factorial experiment?

Hi all I'm hoping that someone can let me know whether this is a suitable approach for analysing a dataset. I have a 3x3 factorial design, so 2...

• Replies: 0
• Views: 1,638
04-08-2016, 04:07 AM
28. Effect Size in Poisson Reg with a Binary Predictor

Well, I don't regularly come across count variables as dependent variables. What is the best effect size to report for a Poisson reg model with a...

• Replies: 2
• Views: 1,445
04-07-2016, 01:26 PM
29. Help with a simple linear regression with a huge backlog of data

Hi there. I am trying to run a regression that will help me predict Y from X. While this is pretty simple and I have done it already, I have many...

• Replies: 1
• Views: 713
04-07-2016, 07:16 AM
30. Compare coefficients of two regression models

Hi, I have a little problem I hope someone can help me with. I run 2 multiple regression models with the same independent variables but...

• Replies: 1
• Views: 745
04-07-2016, 07:10 AM
31. low frequency independent variable in logistic regression

I'm running a logistic regression and I think there's a variable that I'm not treating properly. I'm modeling traffic accidents (1) vs. no...

• Replies: 6
• Views: 1,804
04-06-2016, 07:06 AM
32. Confused about my Logistic Regression output (SPSS)

Hi Guys, I've conducted a binary logistic regression using 2 categorical predictors (Static-moving and moving-static) and an outcome variable...

• Replies: 4
• Views: 1,219
04-06-2016, 04:44 AM
33. Information Criterion to compare different linear models

Dear Community, In order to perform a price forecast, I built four linear models:1-3 have one independent variable, 4 has two independent...

• Replies: 1
• Views: 1,130
04-05-2016, 07:25 AM
34. Log-Linear

Hi all, I have a sample data of Mortality vs GDP. I need to make a Log-linear regression analysis. I transformed the data to log scale and then...

• Replies: 0
• Views: 833
04-03-2016, 07:08 AM
35. Multiple Regression

I'm supposed to analyze data to see if an implementation fee was followed by a change in passenger volumes over a 4 year period. I've started to...

• Replies: 0
• Views: 1,601
04-02-2016, 11:41 AM
36. Robust regression, bootstrapping and indirect effect

Hi there, I am currently learning to do mediation analysis using bias-corrected accelerated bootstrap confidence intervals, similar to the...

• Replies: 4
• Views: 1,563
Tux
04-01-2016, 07:55 PM
37. SOS: Linear Regression

Hi guys, it's a first time I am doing regressions for my dissertation and really need your help. I haven't been studying econometrics before, so I ...

• Replies: 0
• Views: 1,078
04-01-2016, 07:10 AM
38. How to minimize volatility in dataset?

Hi guys, We are currently struggling with a bit of an issue with regards to multiple regression. It concerns how to deal with substantial...

• Replies: 2
• Views: 853
03-31-2016, 12:31 PM
39. Multiple regression with interaction - and dummy variables?

Hi guys! So, here's the deal. I'm in a bit of a pickle here :shakehead I'm currently struggling with a take-home exam where I'm having trouble...

• Replies: 9
• Views: 1,644
03-31-2016, 09:07 AM
40. Chi Square and Regression

Hi all, First time post so please go easy on me :p I have a bunch of categorical variables that I am thinking of using as predictor variables...

• Replies: 3
• Views: 1,776
03-30-2016, 12:18 PM
41. Comparing betas with log transformation of independent variable

Hi all, I would like to compare the results of three studies. All use linear regression with continuous independent and dependent variables. The...

• Replies: 0
• Views: 1,770
03-30-2016, 06:35 AM
42. Anova find significant diferrences

Hi all, I have made an one-way anova in order to test if three populations have the same means. My result is to reject the null hypothesis. So,...

• Replies: 4
• Views: 1,331
03-30-2016, 01:17 AM
43. How to report a non-significant regression?

Hi guys, For my final year research project, I have a few regression models with non-significant results. I was just wondering what the...

• Replies: 4
• Views: 6,148
03-29-2016, 03:45 AM
44. Ordinal or Multinomial Regression

Hi, If I have a variable called time spend following politics with the following possible responses: No time under half an hour a day...

• Replies: 5
• Views: 1,330
03-28-2016, 06:16 PM
45. Logistic regression interpretation

Can anyone please interpret these results for me i will be highly obliged. Thank you B S.E. Wald Sig. Do you know the doses of every pesticide...

• Replies: 3
• Views: 1,295
03-28-2016, 02:35 PM
46. Basic regressionquestion

Hi, I am currently learning ML algorithms and implementing in R. I have a some basic questions. 1.)I know that linear regression an statistical...

• Replies: 2
• Views: 1,339
03-28-2016, 10:59 AM
47. How to calculate the percentage contribution in full factorial and RSM models

Hi, My question might seem quiet straight forward but here it goes: How can I calculate the percentage contribution of each input parameter in...

• Replies: 0
• Views: 1,911
03-25-2016, 08:04 PM
48. Proper Interpretation of odds ratio less than 1 for my study

Hello everyone, This is for a PhD, research in psycholinguistics. I have done logistic regression analyses where some chosen predictor...

• Replies: 18
• Views: 31,689
03-25-2016, 03:55 PM
49. Bidirectional relationship with longitudinal data: what's the best model?

N=1000+. I have about 3-4 repetitive measures of a few numerical variables and categorical variables. How do I test the hypothesis that x...

• Replies: 3
• Views: 2,118
03-23-2016, 09:29 PM
50. Low-prevalence covariates in multiple linear regression analysis

Is there any problem adding low-prevalence covariates to standard multiple linear regression (spontaneous entry)? For example, I have 1000+...

• Replies: 2
• Views: 959
03-23-2016, 07:59 PM
51. Regression individual and group-level data

Hi all, I'm testing whether observing behavior leads to copying behavior (monkey see, monkey do) in a team setting. I've collected data from...

• Replies: 3
• Views: 1,318
03-23-2016, 07:40 PM
52. Compare Correlation Coefficients

Hi everyone, I currently have to do an empirical work in Stata and need some help. I have a regression in this form and want to compare the...

• Replies: 0
• Views: 760
03-22-2016, 11:31 AM
53. Both categorical and continuous predictors?

I'm sure this is very simple but I just want to be sure. I have actually been searching the web for a while now and can't seem to find a clear...

• Replies: 5
• Views: 1,893
03-21-2016, 04:35 PM

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