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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Defining relation of a fold over design

Dear All, I am reading the book DC Montgomery on my own. The book says that the defining relation for a foldover design will have L + U - 1 words...

• Replies: 0
• Views: 463
10-18-2016, 01:50 PM
2. ### Heteroscedastcty with large number of cases

I ignore here that I have populations commonly :p I have heard that heteroscedastcity is not an issue when you have large sample sizes (I have ten...

• Replies: 10
• Views: 1,152
10-17-2016, 01:21 PM
3. ### Multiple Regression study

delete this

• Replies: 0
• Views: 465
10-17-2016, 02:52 AM
4. ### Multicollinearity problem in binary logistic regression

I'd like to ask for some help with a binary logistic regression. In SPSS I am trying to build a binary logistic regression with 4 independent...

• Replies: 2
• Views: 701
10-16-2016, 01:52 AM

I have a very weird question which I guess is not replicated hopefully I can get an answer. when using the multiple regression analysis in excel via...

• Replies: 1
• Views: 440
10-15-2016, 09:42 PM
6. ### 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: 1,622
10-15-2016, 10:50 AM
7. ### Many predictors relative to cases, want to identify interesting ones

I've been helping a colleague with his research project. He is looking at the trustworthiness of profile texts. He is analyzing text entries using...

• Replies: 2
• Views: 510
10-14-2016, 02:31 PM
8. ### Interaction Terms in Linear regression

In R I used the linear regression call for three variables: y, x, and c Y and X are numeric where C is a dichotomous {0,1}. X and C are the...

• Replies: 1
• Views: 503
10-12-2016, 08:48 PM
9. ### Linear Regression coeffiecients used in Exponential Regression

I have a decay curve (y) with values 1, 0.75,0.64,0.54,0.46. The x values are 1,2,3,4,5. First a simple linear regression was performed (y =mx + b)....

• Replies: 0
• Views: 524
10-12-2016, 11:36 AM
10. ### Controlling for a variable in multiple regression creates significance of another var

I have continuous variables A, B and C. A/B correlates with C significantly. Neither A, B or A*B correlates significantly with C. In multiple...

• Replies: 1
• Views: 430
10-12-2016, 08:12 AM
11. ### Static & Dynamic variables in one model

Hello! My name is Valentina and I am a Master student, currently working on my MSc thesis. I am examining the effect of Politicians on the board...

• Replies: 0
• Views: 461
10-12-2016, 03:03 AM
12. ### Multivariate ''binary'' logistic regression...???

Hello all, My name is Nick. I am a doctor and i would appreciate any of your help in the above problem. Recently, on purpose to delineate/propose a...

• Replies: 3
• Views: 725
nok
10-11-2016, 01:55 PM
13. ### Regression Lines

Can someone please explain this to me In a random sample of 40 students, the mean number of hours spent studying is 7.5 with a standard deviation...

• Replies: 1
• Views: 434
10-11-2016, 11:48 AM
14. ### Country Variable

Hi Stata Experts, I have a question concerning an idea for my thesis. I have firm-specific data (assets, sales, income etc.) for different firms...

• Replies: 0
• Views: 441
10-11-2016, 08:27 AM
15. ### Regression after multiple imputation

Hello every one. I want to perform simple binary logistic regression after multiple imputation but I constantly get this message and the execution of...

• Replies: 5
• Views: 708
10-10-2016, 07:45 PM
16. ### Approximating the probability of an event occuring from the output of a Poisson GLM

Hi all, I have some data that includes the output of a Poisson Log Link model, that aims to predict how many times an event will occur over the...

• Replies: 2
• Views: 687
10-10-2016, 11:15 AM
17. ### Spearman's Correlation and Wilcoxon Signed Rank Test

Hey guys! I have an urgent question for my master thesis. In my thesis, I'm comparing 4 performance metrics. My data consists of 100 funds and...

• Replies: 0
• Views: 731
10-10-2016, 11:13 AM
18. ### Regression with additive and multiplicative predictors

Hi, we are analyzing pollutants in mussels with regression models. Let's say we have only the two predictors (1) "year" and (2) "month". However,...

• Replies: 8
• Views: 860
10-10-2016, 07:50 AM
19. ### OLS Regression w/ longitudinal data

I have a longitudinal data set with two waves. Several variables exist in both waves. I want to examine the following question with and OLS...

• Replies: 0
• Views: 598
10-07-2016, 03:33 PM
20. ### Postive correlation but negative coefficient in regression??

Im a little confused by some results I have..... I have two predictor variables and an outcome variable. The first predictor is positively...

• Replies: 23
• Views: 45,673
10-07-2016, 04:31 AM
21. ### Stationary data first after the 2-order/3-order difference on LN(variable)

I want to make an Linear Regression. Dependent variable: GDP Independent variables: Net exports and Debt and some control variables All variables...

• Replies: 0
• Views: 1,401
APA
10-06-2016, 08:33 AM
22. ### What information can we get from the table of deviance residual (regression)?

Hello, I was wondering what's the importance and substantive interpretation of the table of deviance residual in the context of (logistic)...

• Replies: 0
• Views: 410
10-05-2016, 09:01 AM
23. ### Large odds ratio in binary logistic regression/big scale difference of variables

I'd like to ask for some help with a binary logistic regression. In SPSS I am building a binary logistic regression with 4 independent continuous...

• Replies: 3
• Views: 603
10-02-2016, 05:53 AM
24. ### calculation of the average leverage when predictor(s) is categorical

Hello, I was reading different resources about regression diagnostic, in particular for Logistic Regression. As for leverage, the sources suggest...

• Replies: 3
• Views: 562
09-30-2016, 02:41 PM
25. ### Poisson regression for Count data

Hello Every one, I'am working in Toxicological lab, Where we deal with animal data. I have to perform Poisson Regression for count data but i...

• Replies: 9
• Views: 1,467
09-28-2016, 06:38 PM
26. ### Correlation VS linear regression using proportional data

Hi, I was hoping someone may be able to assist. I have discussed this with two people who understand a great deal about stats, although I read...

• Replies: 0
• Views: 1,536
09-28-2016, 11:52 AM
27. ### Dealing with missing values

I am analyzing the data of a cohort study.There are three sets of paired data (same measures on same subjects in 3 different point of time). The...

• Replies: 2
• Views: 648
09-27-2016, 06:54 AM
28. ### Generalized Least Squares (and ANOVA type III)

Dear all, I ran a type III ANOVA on a model of this kind: gls(y~x1+x2+x3). I found that both x2 and x3 are significant. However, if I drop x3 from...

• Replies: 5
• Views: 525
09-22-2016, 01:07 PM
29. ### Eviews 9 Tutorial Fixed Effects And Random Effects Two Stage Least Squares

https://www.youtube.com/watch?v=M8OuLQYHDrM Fixed Effects And Random Effects Two Stage Least Squares (2SLS) regression analysis is a statistical...

• Replies: 0
• Views: 772
09-18-2016, 11:44 PM
30. ### Time series or not?

I am working with three series of 33 yearly observations each. My goal is to understand causality and the long run relationships between them; one of...

• Replies: 3
• Views: 1,641
09-17-2016, 12:10 PM
31. ### Multivariate models - standard error help

I have 2 multivariate models created in R concerning nutrition Model 1 = -11.5±1.68 + 0.56±0.562 Intake + 16.6±0.165 Potassium concentration ...

• Replies: 0
• Views: 506
09-16-2016, 06:14 AM
32. ### Logistic Regression of Weekly NFL Data

This guy uses a type of regression to predict NFL games: http://trevorbischoff.com/amos-2016-nfl-predictor/

• Replies: 1
• Views: 684
09-14-2016, 09:38 AM
33. ### Regression analysis and reflective vs. formative scales

Hey there, I am using multiple regression analysis to analyse the data of an empirical study in the behavioural science. One of the scales I'm...

• Replies: 0
• Views: 464
09-11-2016, 08:19 AM
34. ### Same variable on both sides - how to resolve this?

I have a regression which is supposed to capture the effect of R&&D expenditures on stock returns, given some controllers X1, X2 and volatility, i.e....

• Replies: 1
• Views: 797
09-11-2016, 07:42 AM
35. ### What Kind of Regression Do I Need for This?

I have a data like this. I need to find 7 predictors' coefficients for the best model to predict dependent. It can only be 1 and 0. A B ...

• Replies: 6
• Views: 604
09-09-2016, 03:09 PM
36. ### Forecasting with Google Trends

Hi Guys, I try to investigate wether Google Search data can improve a forecasting model for the German housing market regarding prices and...

• Replies: 0
• Views: 465
09-09-2016, 05:52 AM
37. ### Research Help_Regression Analysis_Log Transformation for Better Fits

Dear All, I'm doing a research on the estimation of "Tunnel Cost" for which I carried out some regression analysis based on data of 30 tunnel...

• Replies: 2
• Views: 652
09-07-2016, 02:26 PM
38. ### Categorical multiple linear regression analysis - what would you do?

Noob here. I'm doing a project to determine how different factors (race, insurance status) are related to distance from pediatric urologists. I'm...

• Replies: 4
• Views: 682
09-05-2016, 07:16 PM
39. ### VIF issues

Good afternoon, I ran a hierarchical regression model, (main effects in step 1, two-way in step 2 and three-way in step 3). My VIF in step 1 are...

• Replies: 5
• Views: 1,073
09-05-2016, 09:16 AM
40. ### Binary Logistic Regression Assumptions Testing

Hi there, I am having difficulties testing some of the assumptions while conducting a binary logistic regression for an exploratory study. 1....

• Replies: 9
• Views: 861
09-03-2016, 03:05 AM
41. ### Need some ideas

I need to present something, anything and if anyone has any idea what I can do with this data and how I can pitch it, it would be appreciated. ...

• Replies: 1
• Views: 364
09-02-2016, 04:39 PM
42. ### Cave Temperature Analysis, Real life management issues.

Hi, I've taken math course's up to Calc III and Diff Eq, but never a statistics course. So I was hoping this forum could help me. I am working...

• Replies: 0
• Views: 459
09-02-2016, 12:13 PM
43. ### Model conception

Hello! I have a basic stats question: I want to model a phenomenon, and estimate parameters. How many observations would I need, to be as...

• Replies: 0
• Views: 422
09-01-2016, 04:44 AM
44. ### Multivariate responses

Hey guys, Needed some help on this. Say there is a question what would you spend on : 1) Car 2) House 3) Wedding 4) *** 5) ***

• Replies: 1
• Views: 519
08-31-2016, 10:17 PM
45. ### Interaction between categorical and scale variables?

Hi, I'm supposed to conduct a regression analysis between two variables, controlling for a third. My issue is that all of the output I'm getting in...

• Replies: 2
• Views: 536
08-31-2016, 06:17 AM
46. ### Comparing fit of GLM to OLS regression

Hello talkstat. First post in this magnificent forum! In my master thesis I'm estimating health care expenses to patients, who has experienced...

• Replies: 8
• Views: 891
08-29-2016, 06:28 AM
47. ### Mixed Logit Regression Problem with AIC / BIC

Hi, I am new to this forum and have trouble with my mixed logit regression model. I have conducted an experiment with 169 participants who each...

• Replies: 0
• Views: 750
08-29-2016, 06:22 AM
48. ### Why do you divide by n-1 to find sample variance? Linear regression

Okay I have very limited knowledge on statistics but I'm wondering why the hell you divide the numerator in the sample variance formula by n-1. I've...

• Replies: 2
• Views: 1,370
08-28-2016, 03:31 PM
49. ### R-squared and Standard Error of weights focuses too much on centre of distribution

Hello, I got slides from A.Pelsser presentation about replicating portfolios and there was a claim that R-squared na Standard Error of Weights...

• Replies: 0
• Views: 729
08-28-2016, 04:42 AM
50. ### Regression Analysis thoughts - Could I model my data this particular way?

Hello, Looking for a guidng hand with a regression problem that I have managed to create. Apologies for my lack of statistical knowledge, but if...

• Replies: 1
• Views: 528
08-26-2016, 01:20 PM
51. ### Necessary to rank transform ANCOVA?

Hi all, I'm hoping you can shed some light. My data are non-parametric, so I thought I'd have to use ranks in order to do ANCOVA, but then I read...

• Replies: 17
• Views: 1,634
08-25-2016, 01:10 AM
52. ### Variance of single element of random effects in linear mixed model

Hi there, I have recently been working a bit with linear mixed model and in order to enhance my understanding of those, I would like to know the...

• Replies: 4
• Views: 695
08-24-2016, 10:38 AM
53. ### Regression analysis : with ranking data

In my survey I have independent variables of age , sex and length of membership I have then have a question where I ask participants to rank 5...

• Replies: 2
• Views: 603
Epy
08-24-2016, 04:21 AM
54. ### Lag Lenght

Hi guys. I am making research and I am faced with some problem. I have VAR model and try to conduct ADF test. I use Schwarz criteria for defining lag...

• Replies: 0
• Views: 419
08-24-2016, 04:00 AM
55. ### Interpreting an interaction effect

Hi All, Last year I ran an experiment where I measured the behaviour of a songbird (how long it took them to approach a speaker playing their...

• Replies: 6
• Views: 990
08-23-2016, 04:57 AM

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