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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### continuous dep variable with several indip dicotomic variables: which statistic?

Hello there! I have to analyze these results: my dependent variable is continuous (blood levels of a substance) I have several indipendent...

• Replies: 5
• Views: 2,454
09-04-2013, 08:30 AM
2. ### Reporting Beta + unstandardized CIs?

Hello, I did a multiple regression analysis and for now always only reported the standardized effect sized (Beta). Since I heard that it would be...

• Replies: 2
• Views: 2,328
09-04-2013, 07:15 AM
3. ### Noob question about predictive modeling

I'm trying to understand some concepts related to predictive modeling. So let's say that I have the following data sample and am trying to regress...

• Replies: 2
• Views: 1,614
09-04-2013, 03:46 AM
4. ### Which forecasting method is most appropriate?

Hi everyone, This question may be a bit tough but here goes! I want to forecast purchases for a two-day sale. I have historical data from a...

• Replies: 1
• Views: 1,425
09-03-2013, 10:28 AM
5. ### help on interpreting result

Hello, I have 2 (economic) var. the regress. on % changes shows an R2 close to 0. If I regress the (actual) values, instead of their % changes,...

• Replies: 0
• Views: 1,261
09-03-2013, 04:13 AM
6. ### Multivariate normality

I know various methods of determing if the bivariate relationship of two variables are normal. But, as Dason has drilled into me, its multivariate...

• Replies: 50
• Views: 9,979
09-02-2013, 10:04 PM
7. ### 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: 2,939
09-02-2013, 04:55 AM
8. ### Which type of ANOVA is appropriate?

I have two independent variables and one dependent variable. The same subjects were used (because of the limited number I had) to measure the...

• Replies: 2
• Views: 1,202
09-02-2013, 04:03 AM
9. ### When to use Instrumental Variables

Suppose I am jointly estimating two equations, and I suspect that there may be correlation between the error terms in the two equations, can I use an...

• Replies: 1
• Views: 1,338
09-01-2013, 09:32 AM
10. ### Help on how to analyse data

Hi All, My name is Sergio and this is my first post to this community. I'm analysing an algorithm for my master's (bioinformatics)...

• Replies: 0
• Views: 1,194
08-31-2013, 08:22 AM
11. ### Model selection for logistic regression, comparing p-value approach, BIC and CV.

Hi, I need to write a discussion on three approaches of model selection; p-value, Bayes factors (using BIC) and leave-one-out cross validation. ...

• Replies: 1
• Views: 1,242
08-30-2013, 09:36 AM
12. ### Multiple Regression

Hey everyone, I am a graduate student working on my thesis project and I have very minimal background in biostatistics. After talking to several...

• Replies: 2
• Views: 1,382
08-29-2013, 09:11 PM
13. ### Running time-series regressions on discontinuous datasets: is it legitimate?

I would like to run a simple time-series regression, to estimate the sensitivity of my dependent variable to a set of explanatory variables. ...

• Replies: 1
• Views: 1,342
08-29-2013, 09:56 AM
14. ### Stepwise and Hierarchical regression - can these 2 be combined?

Hi all, I have run both hierarchical and stepwise methods on my data with 34 IVs (categorized under 7 groups of variables), using SPSS. The...

• Replies: 3
• Views: 2,608
08-29-2013, 09:45 AM
15. ### Selecting Variables for Multiple Regression (Univariate Significance Levels)

Hi All! I really hope someone can answer my question. I am building multiple linear regressions and I am testing salient variables one by one at...

• Replies: 9
• Views: 3,729
08-28-2013, 07:35 PM
16. ### Is it ok to have coefficients in exponents?

Hi all, Pardon me for being so naive, but is it ok to have coefficient in exponents figure. actually I ran a regression model in stata by xtreg...

• Replies: 12
• Views: 2,164
08-28-2013, 03:54 PM
17. ### How to do Curve fit for data

I am not able to fit curve for the data I have, and need some help. I removed metal from water and obtained the following results: days Removal...

• Replies: 5
• Views: 1,727
08-28-2013, 10:56 AM
18. ### Mixed effects logistic Regression

I have what I believe is a mixed effects logistic regression. My outcome is injury (y/n) and I have subject level (age, gender, smoking) and Class...

• Replies: 3
• Views: 5,747
08-28-2013, 07:06 AM
19. ### Logistic Regression with Mixed effects

I have a logistic regression setup: Outcome = injury (y/n); predictors that are subject specific are gender, age, smoking, and predictors that are...

• Replies: 0
• Views: 969
08-27-2013, 12:28 PM
20. ### How to use LASSO with common shocks

I am trying to use LASSO for variable selection, on a balanced panel. I have a total of 14 predictors, and would like to reduce this variable space....

• Replies: 4
• Views: 1,522
08-27-2013, 10:50 AM
21. ### negative binomial regression coefficients and exp(b)

Thank you so much anyone... I have the results of a negative binomial where the DV is the log count of meals obtained. I have continuous predictors...

• Replies: 4
• Views: 5,124
08-27-2013, 09:28 AM
22. ### Partial Linear Regression

I have an S shaped (sigmoid) curve with moderate noise and I need to estimate the slope of the straight line segment around the hypothetical...

• Replies: 10
• Views: 2,411
08-27-2013, 06:06 AM
23. ### Regression with multiple type of independent and likert scale

Hi guys, I just discovered this forum and would appreciate any help because I have little background in stats! My research is about interruption...

• Replies: 12
• Views: 2,150
08-26-2013, 10:06 PM
24. ### Confusion over the F-ratio in a hierarchical multiple regression

Hey all, I'm not used to work with multiple regression analysis, so I would be glad if anyone could help me interpreting this result: I...

• Replies: 1
• Views: 7,525
08-26-2013, 09:33 AM
25. ### Composite score as predictor in MLR

Hello there, I want to conduct a stepwise multiple linear regression analysis with continuous independent variables, in which one of the IV's is a...

• Replies: 0
• Views: 1,888
08-26-2013, 08:25 AM
26. ### Lag Lengths and R-squared vs Significance levels

I am running a basic multiple variable regression with only 2 independent variables, one of which I am lagging. In particular, I'm trying to...

• Replies: 0
• Views: 1,291
08-25-2013, 06:12 AM
27. ### Histogram PDF fitting- Bin Variance Poisson or not

So my basic query is just because you've binned and counted the data into a histogram are the error bars on the bins necessarily the Poisson sqrt(N)?...

• Replies: 0
• Views: 1,319
08-24-2013, 06:41 PM
28. ### Preprocessing Variables before Regression

I have variables x1,x2,x3 and result y. I have a problem that multiple tuples of variables are matched with a single y. For example x1 x2 x3 ...

• Replies: 4
• Views: 1,865
08-24-2013, 12:11 PM
29. ### how to delete observations alternatively?

working on binary logistic regression model. The dependent variable is the status of an observation. Each observation is in one of the following...

• Replies: 2
• Views: 1,422
08-24-2013, 10:10 AM
30. ### comparing regression coefficients between different models to see if they are similar

Hi all; This is a very elementary problem; but unfortunately, my strengths do not like in statistics: I am trying to describe plant growth over...

• Replies: 8
• Views: 1,435
08-23-2013, 09:23 AM
31. ### panel data

does anyone know how to generate a new variable in a panel data set using stata?

• Replies: 1
• Views: 1,400
08-23-2013, 06:37 AM
32. ### panel regression vs cross-section

Hi, I'm running the following regression: y=A+Bx+...+year_dummy for the years 2002-2005 and get that B is statistically significant. However, when...

• Replies: 1
• Views: 1,973
08-23-2013, 06:30 AM
33. ### Rsquared vs Adjusted Rsquared

Hello, I have a question regarding to rsquare. I have a model with 1 independent variable which I measure with Rsquare and I have a model with 3...

• Replies: 9
• Views: 2,251
08-23-2013, 03:58 AM
34. ### Forward stepwise regression procedure: application to panel data

I am in the process of evaluating the importance of some factors in predicting stock returns. In this context, I would like to implement the forward...

• Replies: 0
• Views: 2,278
08-22-2013, 10:30 AM
35. ### GLS simulation: Power of certain effects

Hi all, I have three models that use the same response variable (let's call it Y) and is testing for the effect of three predictor variables...

• Replies: 0
• Views: 1,244
08-21-2013, 05:01 PM
36. ### First difference regression - how to interpret coefficients?

Hi there, I am planning to apply first difference regression in order to account for time (2 time points). I was wondering what will be the...

• Replies: 3
• Views: 13,564
08-21-2013, 03:38 PM
37. ### Time series regression books

Hi, I am interested in Time series regression and I would like to find 1-2 good books that explain Time series with examples using SAS. Does...

• Replies: 4
• Views: 4,452
08-21-2013, 09:37 AM
38. ### 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: 3,295
08-21-2013, 09:11 AM
39. ### backward stepwise regression: all variables eliminated

Hello everyone, Initially I perfomed a standard logistic regression (forced enter method in spss) on my data (small sample): n= 85 and 8...

• Replies: 2
• Views: 5,080
08-21-2013, 08:38 AM
40. ### Rank regression --> help!

I am trying to do a multiple linear regression for a dependent variable Y,with different independent variables X1, X2, X3, etc. I need to use...

• Replies: 0
• Views: 2,070
08-21-2013, 05:10 AM
41. ### ANOVA/MANOVA for a complex data matrix

Hi friends, I've got a data matrix with 140 rows and 5 columns. Each row represents a unique characteristic of the 5 different plant species. Idea...

• Replies: 4
• Views: 2,062
08-21-2013, 02:20 AM
42. ### One population, two sampling methods, how many logistic regression models?

I have 400 randomly selected urban households. I have 400 rural households selected from 15 villages census style. Food insecurity (dichotomous) is...

• Replies: 7
• Views: 1,532
08-20-2013, 01:14 PM
43. ### How to test for Multi-collinearity among dummy explanatory variables

Hello, Almost all the explanatory variables in my data are dummy variables and I would like to test for multi-collinearity among them. Does it...

• Replies: 6
• Views: 2,835
08-19-2013, 04:37 PM
44. ### Pre-processing inputs for a Logistic Regression

Hi everyone, I recently learned about logistic regressions on my own and wanted to create a credit card default model. My question (perhaps...

• Replies: 1
• Views: 2,097
08-17-2013, 05:06 AM
45. ### Using regression slopes as dependent variable

Hi, I am in the process of designing a model and wish to ask if my model is appropriate. Currently, I have a panel data with 30 years'...

• Replies: 0
• Views: 1,199
08-15-2013, 01:47 PM
46. ### no r-squared calculation for models without the constant

hi, I ran a multiple regression in Minitab and tried the model without the constant. It worked well but Minitab did not give me the r-squared value....

• Replies: 6
• Views: 2,706
08-15-2013, 04:57 AM
47. ### regression models on different samples (consulting question)?

hey peeps. today i was asked to consult on the analysis of some data and just wanted to hear your thoughts on whether what i said was reasonable or...

• Replies: 1
• Views: 1,373
08-14-2013, 10:21 PM
48. ### Likert Scale Regression Analysis

I want to perform a regression on some likert scale data. Basically its a scale which measures propensity for participative management. The rationale...

• Replies: 7
• Views: 14,157
08-13-2013, 04:09 PM
49. ### Doing a stepwise mutiple regression

Hi everyone, I've got two continuous DVs (N = 48, so not a huge sample) and three inter-correlated, continuous IVs. I'm interested in finding out...

• Replies: 8
• Views: 2,285
08-13-2013, 11:05 AM
50. ### Multiple Regression in Matlab

Good afternoon, I have a little problem in matlab using the regstats function. I have four matrices with information. Let's name them A, B, C and...

• Replies: 0
• Views: 3,442
08-13-2013, 10:50 AM
51. ### Can I use regression with this type and amount of data?

Greetings all. First time poster here and I hope I can find some help. I have looked around this site and on Google for an answer to my questions but...

• Replies: 1
• Views: 1,418
08-13-2013, 10:07 AM
52. ### Ranking/sorting of variables after 'ordinance regression'

I have run regression and came up with 5 out of the 9 varibles are having an impacat on the final output (0,1,2). I want to see the order in which...

• Replies: 2
• Views: 1,215
08-13-2013, 06:54 AM
53. ### Likert scale regression

I have done a likert type survey ( with 5 point scale) and I am facing problems in analysing the data. following is the situation: Both DV and IV...

• Replies: 10
• Views: 2,314
08-13-2013, 02:53 AM
54. ### [SPSS] Multivariable logistic regression - how to transform to achieve linearity?

Hi, I am doing a project to identify variables that can predict rehospitalisations. There are a few categorical and continuous variables that I...

• Replies: 15
• Views: 14,585
08-12-2013, 07:05 PM
55. ### Explaining cross-sectional variation of betas (PANEL DATA)

Hi, I am a economics master student and have an upcoming research project. Whilst designing a model for my research, I realized that my...

• Replies: 0
• Views: 1,469
08-12-2013, 10:51 AM

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