1. 10-14-2010
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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### How to find Significant difference in R2

Hi My study requires comparing the regression square got from accounting policy 1 and from accounting policy 2. Same set of samples are used in...

• Replies: 0
• Views: 502
04-02-2015, 03:23 AM
2. ### Fisher r to z transform / significance test for two different values of r^2

Short version: I have two values of r^2 from Pearson's correlation, one from a control group (.713) and one for an experimental (.527), and I would...

• Replies: 1
• Views: 999
04-01-2015, 09:10 AM
3. ### Does rate of change in proportion variable depend on ranked independent variable?

I am doing an analysis on the prevalence of a drug resistance mutation in a particular country and how prevalence changed over time. Samples were...

• Replies: 0
• Views: 395
03-31-2015, 08:38 PM
4. ### Interaction terms with non-signficant main effects

I am using a logit model to do the analysis on my dissertation data. 2 of the variables interact, so I have an interaction term. My question is 2...

• Replies: 2
• Views: 588
03-31-2015, 02:35 PM
5. ### Timeseries: Evaluating Var models

I have build some var models with different types of variables and now I want to try to evaluate them and see wich one is the best But when I look...

• Replies: 0
• Views: 455
03-30-2015, 02:10 PM
6. ### Logistic Regression model: a significant predicting variable with low sensitivity?

Hi fellow forum members! Thank you in advance for your time! I used binary logistics regression (SPSS) to determine the relationship between...

• Replies: 1
• Views: 717
03-30-2015, 04:38 AM
7. ### Which test to use (f or t) to test the validity of Okun's Law

Hello, I'm doing a simple linear regression on Okun's law and I need to do a statistical test on the validity of my model. I have two variables;...

• Replies: 0
• Views: 338
03-30-2015, 12:59 AM
8. ### How to compare 2 ORs from different regression models.

I created a logistic regression model to predict an outcome of depression vs. no depression. There are several variables in the model including...

• Replies: 2
• Views: 720
03-29-2015, 09:32 PM
9. ### Panel data ??

Hi, I want to knwo if an historic of 8 years is good enough for using the panel data model with 25 country ?

• Replies: 0
• Views: 489
03-29-2015, 04:48 PM
10. ### Tolerable Serial Correlation/ Auto-Correlation by a Regression Analysis

Hi, is there a similar rule for the tolerable serial correlation/ auto-correlation by a regression analysis like the maximum-minimum quotient...

• Replies: 0
• Views: 438
03-29-2015, 03:31 PM
11. ### Tolerable Heteroskedasticity/ Variance Inhomogenity

Hello, a long time ago I have read somewhere, that a regression can overcome heteroskedasticity/ variance inhomogenity up to certain amount. It...

• Replies: 2
• Views: 553
03-29-2015, 03:23 PM
12. ### p value of the constant, can I ignore it?

I'm analysing the influence of various factors on hare harvests in a specific are. E.g. How do the hare harvests change when the fox harvests...

• Replies: 1
• Views: 486
03-29-2015, 11:31 AM
13. ### Discretization of a continuous variable

He guys, I'm analyzing a research regarding patients and their risk factors for developing a certain side effect. If i enter age as a continous...

• Replies: 14
• Views: 1,615
03-28-2015, 10:53 AM
14. ### Confidence for pooled within group slope

In SPSS simple linear regression one can get the confidence limits either side of the linear regression slope simply by ticking the "prediction...

• Replies: 2
• Views: 559
03-28-2015, 04:18 AM
15. ### Regression with several mediators

Hello there :) Although this is connected to SPSS; I think this is the more appropriate place. Im making a linear regression and have several...

• Replies: 0
• Views: 418
03-25-2015, 09:24 AM
16. ### Approaches for multivariate nonlinear parametric regression?

I have some data that is nonlinear, but is curvilinear. It is two factors and a dependent variable. Each factor has a pretty good fit when applying a...

• Replies: 1
• Views: 541
03-24-2015, 07:45 PM
17. ### Logistic regression using dummies with dependent "holes"

Hi, I'm trying to do do a logistic regression using R. I want to regress using binary dependent variable Y as granted or not grated (1 or 0)...

• Replies: 0
• Views: 397
03-24-2015, 07:15 PM
18. ### Controlling mediation effect in a binary logistic regression

Hi everbody, It's my first post and I hope I posted in the right forum. In my master thesis I use binary logistic regression: a dichotomous...

• Replies: 2
• Views: 799
03-24-2015, 04:14 PM
19. ### Generalized Linear Mixed Models without mixed effects. A meaningless question?

Hi there, I know what fixed and random effects in linear models or GLM are. I am using Generalized Linear Mixed Models (GLMM) to handle this. So...

• Replies: 3
• Views: 585
03-23-2015, 10:02 PM
20. ### relation within Gauss-Newton method for minimization

If we study model fit on a nonlinear regression model Y_i=f(z_i,\theta)+\epsilon_i, i=1,...,n, and in the Gauss-Newton method, the update on...

• Replies: 0
• Views: 392
03-23-2015, 01:02 PM
21. ### Panel Data Model. Problem !

Hi everyone, First, Ihave to mention that I am newbie in statistic so I may have some evident questions ! Actually, I am working on a...

• Replies: 2
• Views: 488
03-23-2015, 12:51 PM
22. ### Multiple regression: one of my significant factors has outliers, what should I do?

So I ran a multiple regression and found two factors that explained one of my dependent variables quite well. The problem is that one of the two...

• Replies: 2
• Views: 763
03-22-2015, 08:29 AM
23. ### [Log.reg.] Can I include confounder that does not have all categories of exposure?

Hello. I am working on a thesis in public health science, and am stuck until this current problem i solved. Your help will be highly appreciated! ...

• Replies: 0
• Views: 496
03-21-2015, 05:51 AM
24. ### Weighted Regression

I have a few questions in regards to setting up and running my weighted regression: Firstly, some background. I am comparing point of subjective...

• Replies: 1
• Views: 747
03-17-2015, 11:36 PM
25. ### Hierarchical regression in SPSS (how to enter interactions when you have a quadratic)

Hello there! I want to confirm if I am entering my variables in the proper way in SPSS for multiple regression. I have four variables: 1) student...

• Replies: 3
• Views: 907
03-17-2015, 04:32 PM
26. ### How do I select a method of regression analysis - Allometry - Animal Growth - Gnu

I am analysing the growth of the wildebeest or gnu. To do this I am comparing the changes in A: Body length (L), B: Girth (G) and C: Shoulder height...

• Replies: 2
• Views: 733
Gnu
03-17-2015, 02:04 AM
27. ### Centering Variables in Interaction with Lagged Dependent Variable

I have to run this regression: Y (t) = a + b1 X (t-1) + b2 Y (t-1) + b3 X (t-1)*Y (t-1) Y at time "t" is regressed using as IVs X at time t-1,...

• Replies: 1
• Views: 621
03-16-2015, 06:04 PM
28. ### pooled OLS regression - industry dummy coefficients higher than the rest

Please delete this thread. I did not find the button to delete it. Thanks a lot Best Mat

• Replies: 0
• Views: 497
03-15-2015, 04:15 AM
29. ### Difference between two regression coefficients

Hi All: This is the context. I have three x variables with following relationship: x1 + x2 = x3. Now, I run these two equations: y = a1 + b1x1...

• Replies: 1
• Views: 607
03-13-2015, 09:18 AM
30. ### Correct statistical test to use for my data (correlation/regression)

Hello everyone, Potentially a silly question (but I am new to all of this): I have collected data from a focal animal study on Naked mole-rats....

• Replies: 0
• Views: 472
03-13-2015, 07:13 AM
31. ### Interpreting coefficients from GLM output

Hi, I'm trying to educate myself further on using GLM and to do so I figured it'd be easiest to conduct a simple experiment where I knew the...

• Replies: 9
• Views: 1,324
03-12-2015, 01:54 AM
32. ### Multi-Level Model

Why in multi-level models can you get away with fewer observations per predictors? I know that I have heard and seen this before, but I am not...

• Replies: 9
• Views: 1,227
03-11-2015, 12:56 PM
33. ### Variance of parts equal to variance of whole?

Good morning, I ran a hierarchical regression to test if variables A and B (established in the literature) are mediated by variable C (my research...

• Replies: 0
• Views: 626
03-09-2015, 07:37 PM
34. ### Multiple logistic regression - need for interaction checking?

Hello, and thank you for reading this post. I am a medical doctor with limited statistical knowledge, so bare with me... I am trying to answer...

• Replies: 3
• Views: 792
03-07-2015, 08:07 AM
35. ### unit price of total pris?

Hi, I am a first year economic student and are having some fun with regressions. I am doing a a regression analyse of some example data I have...

• Replies: 0
• Views: 525
03-05-2015, 05:05 AM
36. ### Which multilevel approach is the right one? Help needed choosing a method.

Hi everyone, I have a data set with a very specific structure and I am looking for a suitable way to analyze it. To be more precise, I am...

• Replies: 0
• Views: 592
03-04-2015, 06:47 PM
37. ### Help with interaction terms

Hi, I have two categorical variables (race and field of study) as a part of my model to predict degree completion. In addition to the original model,...

• Replies: 1
• Views: 619
03-04-2015, 03:58 PM
38. ### Help with interactions in regression

Hi I would really appreciate if anyone could please help me with this. I am doing a regression analysis, looking at the effect of 2 drugs (A or B)...

• Replies: 3
• Views: 627
03-04-2015, 08:19 AM
39. ### Binary Logistic Regression- SPSS Output

Dear TalkStats Forum, I am currently looking into a data-set which measures previous cyber-crime victimization as well as whether the participants...

• Replies: 1
• Views: 457
03-03-2015, 03:58 PM
40. ### Interpreting Coefficients in Mediation Analysis with Logged Variables

Hello out there. I really hope u can help me because i've tried to find a solution to my problem for ages now.. im performing a mediation analysis...

• Replies: 0
• Views: 608
03-03-2015, 05:22 AM
41. ### transform probit into logit

Hi everyone, is there a way to transform results obtained from a probit regression into results obtained from a logit regression? I am looking for...

• Replies: 1
• Views: 644
03-02-2015, 04:21 AM

Hi,please help me. I'm working on a thesis to determine the effect of independent variables(four independent variables, denoted by X1,X2,X3 and X4)...

• Replies: 0
• Views: 692
03-01-2015, 09:26 PM
43. ### statistical tool/program for obtaining stiffness properties by force-deflection data

I am performing flexural testing of composite honeycomb sandwich panels as per D7250,desired deliverables(stiffness values G,U and D) are obtained...

• Replies: 0
• Views: 658
03-01-2015, 11:42 AM
44. ### Dependent variable is function of itself

I have a model: qty=a.price+....(other IVs) Price is calculated as sales_amount/qty. Hence for a customer, if we aggregate data of a certain...

• Replies: 2
• Views: 810
02-27-2015, 08:55 PM
45. ### R-Squared Change - Multivariate Multiple Regression

Hello everyone, I've been asked to conduct a multivariate multiple regression with multiple DVs (3 measures of a dependence construct) predicted...

• Replies: 0
• Views: 729
02-25-2015, 07:34 PM
46. ### Non-linearity in OLS-Models, Multinominal Logit-Regression

Hey there, I have a question connected to the Ols-Model in case of nonlinearity between parameters. What should be done if the assummption of...

• Replies: 2
• Views: 646
02-25-2015, 12:49 PM
47. ### Hot to analyze data at various levels (company and employee)?

I have a data set with data at two different levels. I want to analyze the perceptions of employees of a specific management practice. The data...

• Replies: 1
• Views: 658
02-25-2015, 12:45 PM
48. ### meta analysis of many regression studies

Ive searched the forum for answers to this but no joy yet so please help if you can. I have about 30 published studies looking at the dependence...

• Replies: 9
• Views: 1,695
02-25-2015, 05:31 AM
49. ### Discrepancy between Geogrebra, Excel, Desmos, and TI-83 PLUS...what's the deal?

As my title implies, there is a discrepancy between Geogebra, Excel, Desmos, and TI-83 Plus. Let me explain myself I have created a fifth and...

• Replies: 3
• Views: 988
02-21-2015, 08:09 PM
50. ### Checking homoscedasticity in repeated measures

Hello, When checking the assumption of constant variance for repeated measures data, am I correct in thinking that the variance of residuals...

• Replies: 0
• Views: 668
02-18-2015, 11:36 AM
51. ### Conditional logistic regression- effect of modifiers

Hi everybody, I am new here in this forum. I am studying the effect of air pollution (PM) on health outcomes, and the characteristics that might...

• Replies: 0
• Views: 532
02-18-2015, 03:18 AM
52. ### Multiple regression where only part of the sample completed the follow up survey

Hi, For my dissertation I trying to determine whether several emotions predict behavioural intention and behaviour. Participants were asked to...

• Replies: 0
• Views: 494
02-16-2015, 03:33 PM
53. ### Interaction between binary and continuous variable in OLS

I am trying to examine the association between maternal education and child school test scores using the following equation. TestScore = β0 + β1...

• Replies: 3
• Views: 931
02-16-2015, 08:09 AM

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