1. Announcement:
05-10-2017
Views:
1,194
Page 12 of 72 First 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 62 ... Last
Threads 661 to 720 of 4283

# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### What does intercept mean in regression analysis?

I have searched it on the web but I just cant understand it. To better understand it I did one example my self. Can somebody explain me this? >...

• Replies: 3
• Views: 1,424
12-12-2015, 11:59 AM
2. ### Multi variable Regression

Dear Regression Experts, I am new in this field, I have set of data of about 1 lac entries having a total of 10 variables of which 9 are input...

• Replies: 4
• Views: 1,120
12-12-2015, 01:34 AM
3. ### Calculate estimated median survival time (by hand)

So I have some SAS code: proc lifereg data=surv_data; model event_time * censor(1) = var1 var2 var3 / distribution=weibull; output...

• Replies: 5
• Views: 1,095
12-11-2015, 01:05 PM
4. ### Tutorial Tobit Eviews 9

The tobit models, Also called a censored regression models (Tutorial Tobit Eviews 9) (Guide Tobit Eviews 9) (Regression Tobit Eview 9), is designed...

• Replies: 0
• Views: 2,618
12-11-2015, 12:53 AM
5. ### Eviews 9 Tutorial Two Stage Least Squares

Two-stage least squares (TSLS) is a special case of instrumental variables regression. As the name Suggests, there are two distinct stages in the...

• Replies: 0
• Views: 1,846
12-09-2015, 08:46 PM
6. ### Ordered Logistic Regression - proportional odds

Hey, for a homework paper I have analyze some data. Its about how social networks are related to health. My depended var is an ordinal variable...

• Replies: 0
• Views: 916
12-07-2015, 07:42 AM
7. ### Regression analysis with multicollinearity

I am using jmp software for analysis... I am looking at prognostic factors that influence survival of patients with a specific type of cancer. ...

• Replies: 1
• Views: 710
12-06-2015, 06:05 PM
8. ### Interpretation of the squared term coefficient in the presence of interaction

Hello dear form members, Please consider the following regression model: y = a + b1x1 + b2x1^2 + b3x2 + b4x1*x2 + e, Note that x1 is (1)...

• Replies: 6
• Views: 1,316
12-06-2015, 11:03 AM
9. ### Rare suppressor effect?

Hey, I recently discovered a somewhat surprising result in a hierarchical regression: I have three predictors (C M N) and one outcome (D). ...

• Replies: 2
• Views: 1,034
12-06-2015, 06:45 AM
10. ### Applying multiple regression results to new data SPSS

My study involves testing infants at multiple time points using a number of behavioural tests. I used a multiple regression to establish which...

• Replies: 3
• Views: 1,192
12-06-2015, 04:17 AM
11. ### Integrating a continuous predictor in multiple logistic regression?

Hi everyone, I was wondering if you could help tell me if this would be possible. I'm doing a health research project were I am using a lot of...

• Replies: 1
• Views: 582
12-06-2015, 03:50 AM
12. ### Estimate a Logistic Regression Model

Hi guys, I want to estimate a logistic regression model's equation based on observed data and get the coefficients to extrapolate further. I have...

• Replies: 6
• Views: 1,600
12-04-2015, 01:18 AM
13. ### Specifying the correct model in Oxmetrics

I have an equation: Y = c + b1X1 + b2X2 + b3X3 Y = Cryptographic ability (scaled 0-200) X1 = Pattern recognition skills (scaled 0-20) X2 =...

• Replies: 0
• Views: 589
12-03-2015, 12:43 AM
14. ### statistical robustness analysis in minitab

Hello! I was asked to comment on statistical robustness analysis in minitab, but honestly I don't know much about it. Can anyone help me...

• Replies: 0
• Views: 894
11-29-2015, 04:11 PM
15. ### Logit:why aren't my exponentiated coefficients equaling my odds ratio (for nominal x)

I'm running logit in JMP. My understanding is that if you exponentiate the coefficients, you get the change in odds ratios from a 1 unit change in X....

• Replies: 3
• Views: 1,202
11-28-2015, 10:18 PM
16. ### cross-validated AUC

Hello All, I hope the thread's title makes sense to you. I need to perform internal Cross-Validation using k-fold CV (needless to say, to assess how...

• Replies: 10
• Views: 1,522
11-27-2015, 03:32 PM
17. ### [Logistic regression: Stepwise] Why does the model keep a non-significant predictor?

Hello there, I'm running a logistic regression with four independent variables. I use the Stepwise: Backwards LR method for the regression. ...

• Replies: 2
• Views: 968
11-27-2015, 03:56 AM
18. ### Comparing AIC between OLS and Quantile regression

Hello all, Is it acceptable to compare the AIC of an OLS linear model to the AIC of a quantile linear model to see which is the better fit? I...

• Replies: 0
• Views: 614
11-26-2015, 12:10 PM
19. ### Variable Analysis

I'm new to using regression and was curious how most of you go about creating a tightly fit model. I've always tried to get all my variables under a...

• Replies: 1
• Views: 706
11-24-2015, 07:34 AM
20. ### ANCOVA - can I delete a very significant variable from a model's equation?

Hi all, I undertook a sensitivity analysis to study the contribution of explanatory variables to soil organic carbon variations. Here, the...

• Replies: 5
• Views: 892
11-24-2015, 07:30 AM
21. ### Multiple linear regression using moderators

Hi guys, first post here! First some background information: I am doing a study that examines whether patents and trademarks (2 independent...

• Replies: 0
• Views: 893
11-23-2015, 11:40 AM
22. ### Instrumental variable approach to a model with squared and interaction terms

• Replies: 0
• Views: 531
11-22-2015, 04:50 PM
23. ### Degree of Freedom in extra sum of squares

Give the degrees of freedom associated with a)SSR(X_1|X_2) b)SSR(X_2|X_1,X_3) c)SSR(X_1,X_2|X_3,X_4) d)SSR(X_1,X_2,X_3|X_4,X_5)

• Replies: 0
• Views: 739
11-21-2015, 12:29 PM
24. ### [Logistic Regression] - Is it possible to compare the outcomes?

Dear all, First time poster here. I'm currently working on my thesis and i'm stuck with a complex matter which i hope you guys can help me with. I...

• Replies: 1
• Views: 933
11-21-2015, 02:55 AM
25. ### Implement Young's Information Criterion in Matlab for analyzing recursive arx models

Hey For an assignment we want to implement the YIC instead of Aikake's information criterion because it's more suitable to fit our data. We have...

• Replies: 0
• Views: 974
11-20-2015, 04:24 AM
26. ### regression on age groups

Dear All, I have the following question: Estimate a simple regression model of ‘libertarian-authoritarian’ attitude as a function of age groups...

• Replies: 5
• Views: 2,801
11-17-2015, 06:37 PM
27. ### Will Cochrane-Orcutt process remedy heteroskedasticity? Using GRETL

I tried searching for this in the forums but cant seem to find anything. I'm probably just wording it wrong. I'm working on a research project for...

• Replies: 1
• Views: 671
11-17-2015, 05:44 AM
28. ### Model to use, fractions as independent and dependent variables

Hi, I have some background on doing regression analysis, however never on fractional variables. My question is related to model selection on...

• Replies: 1
• Views: 1,193
11-14-2015, 04:36 PM
29. ### Which R-Package / function is appropriate? fixed variance, random coefficients and AR

Hi, I have time-dependent data which show an inreasing variance with a certain covariate X (which can be modelled using a fixed cariance...

• Replies: 0
• Views: 660
11-14-2015, 03:20 AM
30. ### Regression with Differential equations (ODEs / PDEs)

Hi, in the field of mathematical modelling of biological or physical processes, most of them cannot be described by simple (linear or nonlinear)...

• Replies: 0
• Views: 644
11-12-2015, 07:18 AM
31. ### A coefficient to determine Variance

Hi I am working on a system where temperature stabilises with distance but also increases/ decreases based on month/ hour. Is there a way to...

• Replies: 1
• Views: 1,503
11-09-2015, 12:41 PM
32. ### Increasing variables decreases DFs?

I'm sorry if this is a total noob question, but I cannot figure it out. When I'm adding variables into my regression into STATA, the degrees of...

• Replies: 2
• Views: 896
11-08-2015, 09:46 AM
33. ### GEE: best model by comparing residuals (SPSS)

Hello there, I am doing a study on vigilance research by comparing different EEG methods (ERP, FFT and ERD) regarding their predictive power of...

• Replies: 0
• Views: 889
11-07-2015, 08:33 AM
34. ### regression analysis for research

hi there, working on a project in which we compare eye contrast among mammals at various points. We collected data (luminance value) for parts...

• Replies: 0
• Views: 787
11-06-2015, 08:20 PM
35. ### Can you help me identify the right test for my data?

I’m trying to identify the right statistical method to use. Here’s a case analogous to mine: Let’s say I’m interested in whether basketball team...

• Replies: 0
• Views: 765
11-06-2015, 06:19 PM
36. ### Adding main effects when main effects model is insignificant

Hi, I have a linear model where both main effects are insignificant, and an overall insignificant model. Should I stop just stop there, or can I...

• Replies: 1
• Views: 603
11-05-2015, 07:31 PM
37. ### Factor scores or mean values?

Dear all, I hope I am in the correct forum and you can help me. At the moment I pursue a survey study. In the survey I obtain items that shall...

• Replies: 0
• Views: 573
11-05-2015, 05:42 AM
38. ### Question related to Generalized Linear Mixed Model

I'm working with a dataset containing the following: Fixed variables: Age, Body Size, Antler Size, Average Age Random variable: Animal ID...

• Replies: 2
• Views: 864
11-04-2015, 10:55 PM
39. ### R Squared and dummy variables

Hey, If you changed your model from one variable to a number of dummy variables, would the R^2 increase considerably, supposing that the dummy...

• Replies: 5
• Views: 1,749
11-03-2015, 02:11 PM
40. ### Country-level Clustering

Hi All, I have a database on firms that went bankrupt/not bankrupt from 1999-2011 across 30+ countries. I have included year fixed effects in my...

• Replies: 1
• Views: 663
10-29-2015, 02:34 AM
41. ### Help with Hat Matrix

considering the model Yi=β0+β1Xi+ϵi, i=1,2,3,…,n how can i calculate the hat matrix and what would element hij be ? thanks

• Replies: 0
• Views: 797
10-28-2015, 07:39 PM
42. ### Partial Correlation question help

Hi, I was wondering if you could help me. I've been set the problem below. I know how to work out the Partial Correlation and I could do it for A1 or...

• Replies: 0
• Views: 686
10-28-2015, 03:45 PM
43. ### Interpreting a IV variable whose values have been changed

Hello all, I'd just like to get advice on the following: I've got a few independent variables which had values ranging from -2.5 to 2.5. I...

• Replies: 1
• Views: 697
10-27-2015, 01:32 PM
44. ### Interaction/moderation in probit/logit

Dear all, in my studies some (maybe trivial...?) questions on interaction/moderation in probit/logit regression came up. Imagine the following...

• Replies: 2
• Views: 1,281
10-26-2015, 12:49 PM
45. ### correlation in multi-level model

In a multi-livel model where level 1 is within-person and level 2 is between-person, can level 1 be a simple correlation between two within-person...

• Replies: 2
• Views: 717
10-23-2015, 01:40 PM
46. ### Testing the equality of the Residual Sum of Squares of two linear models

I have two models of a dependent variable: Y = a1 + b1X1 and Y = a2 + b2X2 The variances around the lines of least error are important...

• Replies: 2
• Views: 656
10-22-2015, 09:19 AM
47. ### Need help with parallel mediated quadratic regression

Dear friends, currently I am stuck with a problem I can't solve on my own - I hope some of you might have a bright idea :) I am looking for...

• Replies: 1
• Views: 758
10-22-2015, 06:18 AM
48. ### Redesigning a questionnaire (a bit long...)

A quick background: I am trying to evaluate a questionnaire used to asses patients. It is used around the world to establish whether a patients...

• Replies: 0
• Views: 591
10-19-2015, 04:59 AM
49. ### Durbin-Watson bound dU>2.0

Hello. I was wondering, how to interpret bounds of Durbin-Watson test (dU, dL) if dU is greater than 2.0. I know that it is an extreme case, but just...

• Replies: 0
• Views: 1,050
10-17-2015, 09:40 AM
50. ### regression for ordinal data?

Hi All, I am looking at data showing injury to intervertebral discs. Injuries are graded on a 4 point scale with 0 being no damage and 3 being...

• Replies: 3
• Views: 1,527
10-17-2015, 06:19 AM

Page 12 of 72 First 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 62 ... Last

Use this control to limit the display of threads to those newer than the specified time frame.

Allows you to choose the data by which the thread list will be sorted.

Note: when sorting by date, 'descending order' will show the newest results first.