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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Help creating my first logistic Regression model

Hi everyone, I`m new here, and new in the stats world, and i have several questions and need for help on how to proceed. First, what i`m doing...

• Replies: 8
• Views: 3,230
07-06-2015, 03:21 PM
2. ### Testing heteroscedasticity statistically

Hi everyone, I conducted a Breush-Pagantest and it is unsignificant, so there is no heteroscedasticity. My residual plot however looks pretty...

• Replies: 2
• Views: 2,022
07-06-2015, 04:05 AM
3. ### How to Handle Blank Fields in Multiple Linear Regression

I am building a regression with 45 samples across 20+ independent variables. I am randomly selecting subsets of the variables and running many...

• Replies: 2
• Views: 1,315
07-02-2015, 01:32 PM
4. ### multivariate regression ?

Hello everyone, I would like to check whether gross margin% is different in different segments. With segments I mean f.e. quantity, weight,...

• Replies: 3
• Views: 1,713
06-30-2015, 07:07 AM
5. ### Time series regression

I am trying to learn how to conduct regression with time series data . I intend to use ARDL which is time series with autoregressive error with the...

• Replies: 0
• Views: 1,147
06-29-2015, 03:51 PM
6. ### Determining the weight of variables

I am trying to determine if one of the numbers in regression summary provide the weight of the important of each variable? Here is an example: ...

• Replies: 4
• Views: 1,245
06-29-2015, 07:06 AM
7. ### Log

Dear all, Im am doing an OLS regression. My dependent variable has large negative values, many zeros and large positive values. How can I...

• Replies: 4
• Views: 1,396
06-29-2015, 02:45 AM
8. ### general mediation question

Hi guys Probably the easiest question ever but I can't really wrap my head around it. The setup of the research is as follow: X and M =...

• Replies: 1
• Views: 1,290
06-27-2015, 04:22 PM
9. ### "Lumping" multiple data sets into one for regression

Closed - moved sub-forums

• Replies: 0
• Views: 1,629
06-26-2015, 01:25 PM
10. ### Error term in log-level models?

I am running a decomposition of log wages for two time periods and want to explain the variance of the error term. My question is: If there is a...

• Replies: 0
• Views: 841
06-26-2015, 11:18 AM
11. ### Chi-quare and logistic regression with three level independent variable

Dear Friends, I am currently working on my master's Dissertation and have some problems in finding out how I should do my chi-square-test and...

• Replies: 2
• Views: 1,366
06-26-2015, 08:56 AM
12. ### Repeated measure regression

I have always heard that ANOVA and linear Regression are essentially the same method and that what one would do the other would as well. I am familar...

• Replies: 0
• Views: 1,111
06-25-2015, 02:33 PM

Hi everyone, Currently I'm writing my thesis on the effects of divorce on children. It's a complex design so I guess I'll be posting more...

• Replies: 2
• Views: 1,303
06-25-2015, 07:50 AM
14. ### What is the proper name for such kind of regression models - 2-stage or 2-step?

Dear community experts, I've faced an interesting situation, which is out of my area of expertise, so I need an advice here from someone more...

• Replies: 7
• Views: 1,432
06-24-2015, 04:21 PM
15. ### Regression analysis(?) for multiple independent variables

Hello all, Apologies for posting an elementary query, but my stats is very rusty. Not looking for an explicit solution, necessarily, just a...

• Replies: 2
• Views: 1,559
06-24-2015, 11:59 AM
16. ### Regression analysis on grouped data

What type of regression model do I use, if I have one dependent variable and five independent variables, but each observation was gathered in groups?...

• Replies: 0
• Views: 949
06-24-2015, 10:38 AM
17. ### WLS Confidence interval

Guys can anyone assist? I've googled and read lots on the matter of WLS (mainly lecture notes from asorted university courses google finds)....

• Replies: 3
• Views: 2,637
06-24-2015, 02:09 AM
18. ### Power analysis for Cox regression...a twist?

Hello, I am planning prospective trial using secondary data. My sample size is 480. I am using an artificial grouping based on an experimental...

• Replies: 0
• Views: 1,192
06-23-2015, 09:27 PM
19. ### Reverse engineering investment performance correlations to apply to a new investment

Hello, I've been given some data for the relationship between investor characteristics and investment performance: KPI | Standard coefficient...

• Replies: 0
• Views: 1,005
06-23-2015, 06:51 AM
20. ### help with non-normality issue!

• Replies: 3
• Views: 1,099
06-23-2015, 06:37 AM
21. ### The probability of being born a male baby?

Thank you! :)

• Replies: 2
• Views: 1,468
06-22-2015, 08:17 AM
22. ### Negative Binomial Regression Coefficient Interpretation

Hello, the results of my negative binomial regression show me a .03 coefficient. Does it mean when I increase my IV by one unit the DV increases...

• Replies: 3
• Views: 1,674
06-17-2015, 05:54 AM
23. ### Mixed model for empty cell design

Hi everybody, I would like to do a mixed effects regression that is like this: ISI ~ Location + Stage + Stage*Location + 1|Patient/Chan ...

• Replies: 0
• Views: 1,237
06-15-2015, 03:30 PM
24. ### hausman test

Dear community, I analyse purchase decisions on different products j over a duration of t days. I would like to include random or fixed effects. When...

• Replies: 1
• Views: 1,589
06-14-2015, 10:12 AM
25. ### ex post regression analysis

So I have 500 different store locations 125 locations are from w brand 200 are from xbrand 100 are from y brand 75 are from z brand each...

• Replies: 0
• Views: 1,053
06-14-2015, 06:16 AM
26. ### minimum adequate model dropped variables

Once ive found my final minimum adequate model, what other options could i use to ensure that all of the variables dropped during the...

• Replies: 0
• Views: 1,754
06-14-2015, 06:05 AM
27. ### Interaction significant but simple slopes not significant?

I have run a forum search and an internet search, and tried posting this question on other forums, but have been unable to find an answer to my...

• Replies: 2
• Views: 4,636
06-10-2015, 09:32 AM
28. ### Do I need to refer goodness of fit indices when I am only interested in estimates?

Hello all, I am intersted in the relationship b/w 3 variables (A,B, and C). Then I constructed a path model as A->B->C. My only interest is how big...

• Replies: 8
• Views: 2,072
06-09-2015, 11:38 AM
29. ### Panel model with FE minimum number of observations per group

Hello dear forum members, I am estimating a panel model with fixed effects using yearly data from 2009 to 2013 (N=1848). Whereas 80% of the data...

• Replies: 3
• Views: 1,960
06-08-2015, 12:53 PM
30. ### Null hypothesis at the 5% level of significance

H0: β1 = β2 = β3 = 0 H1: At least one of the equalities does not hold If I have gotten the answer 5.518 from the formula F k, n- (k +1) = (RSS/...

• Replies: 1
• Views: 2,102
06-07-2015, 02:42 PM
31. ### Nonsignificant mediation analysis

Hello there, first post in this forum. I hope this is the correct subforum, as I have a question regarding psychology statistics, but I am using a...

• Replies: 10
• Views: 1,697
06-07-2015, 01:28 PM
32. ### What to do with non-stationary and not cointegrated panel data?

Hi, I've been trying to conduct a panel data analysis. I have 3 variables, all of them stationary at I(1). Then I employed both Westerlund and...

• Replies: 0
• Views: 1,748
06-07-2015, 05:42 AM
33. ### Replication in linear regression. General Estimating Equations (GEE) a good option?

or is it the only option? I've been collecting hosts in 3 different habitats, about 20 hosts every sampling trip. I've been recording prevalence...

• Replies: 3
• Views: 2,024
06-04-2015, 01:03 PM
34. ### Ordered Probit Model

I am using the ordered probit model in my regression, and I have some questions. 1. What are the basic assumptions? 2. which tests should be run?...

• Replies: 0
• Views: 1,477
06-03-2015, 07:29 PM
35. ### Interpretation of Cross validation (in Logistic Regression) results

Hello! I am faced again with Logistic Regression, and in particular binary LR, in a study that I am faced with trying to assess the impact of some...

• Replies: 0
• Views: 2,348
06-03-2015, 01:53 AM
36. ### Comparing coefficients in Logistic Regression

Hello ! I would like to have guidance on what follows. I was fitting a Logistic Regression model, and I got the coefficients for the model's...

• Replies: 14
• Views: 8,869
06-02-2015, 09:08 AM
37. ### Getting VIF from R

Hello! I was wondering how to get the VIF value for predictors in R (namely, in the context of Logistic Regression). I have read that there is a...

• Replies: 1
• Views: 2,335
06-02-2015, 08:38 AM
38. ### Find the Most Important Variables In Predictive Models

Hi, I have a target variable Y, and twenty predictors (input variables) X1,X2,...,X20. I can predict Y by its predictors X1,X2,...,X20....

• Replies: 1
• Views: 1,133
06-02-2015, 07:16 AM
39. ### Ordinal vs Multinomial

I am interested why predicted probabilities for ordinal and multinomial regressions differ? Can we explain this difference in terms of multinomial...

• Replies: 0
• Views: 1,112
05-31-2015, 05:25 PM
40. ### step wise regression and bootstrap method

anyone able to help me with an article i am critiquing? I wanted to do mediation model and I think the authors have used incorrect method but not...

• Replies: 1
• Views: 1,137
05-31-2015, 05:53 AM
41. ### Logistic Regression as Data Transform?

Hello everyone, new here, glad to be here! I have what might be an unorthodox question. I use the matlab function 'mnrfit' ...

• Replies: 1
• Views: 1,418
hcc
05-30-2015, 10:18 PM
42. ### Help with running two level binary logistic regression model

Hello everyone, It is my first time when I am performing quantitative research. My master thesis is about determining specialist level and...

• Replies: 1
• Views: 1,116
05-28-2015, 11:12 AM
43. ### Including cross-sectional variables in panel data analysis -- can I do that?

Hello dear forum members, I have a panel data set with a count outcome variable. As far as I understand, Yit is conditional on Xit in panel...

• Replies: 3
• Views: 1,207
05-27-2015, 02:26 PM
44. ### Is logistic regression appropriate for this study?

A study that compares 3 different categorical outcomes

• Replies: 1
• Views: 1,194
05-27-2015, 12:00 AM
45. ### Comando para correlacion contemporanea (modelo efectos aleatorios

Buenas noches compañeros, busco un comando para el software stata 13.1, para poder estimar la correlacion contemporanea, para el modelo de efectos...

• Replies: 2
• Views: 1,643
05-26-2015, 09:14 AM
46. ### Reporting logistic regression results

Hi, I have a study that aims to find out the association of a binary outcome (e.g. BP control-Y/N) with categorical independent variables e.g....

• Replies: 3
• Views: 2,606
05-25-2015, 10:29 PM
47. ### Significant effect disappears when separate analyses are conducted

Dear all I have conducted an experiment in which subjects concurrently perform two tasks. Task A stays always the same, while Task B has two...

• Replies: 0
• Views: 1,037
05-21-2015, 10:14 PM
48. ### Errors on fit parameters with no errors on data

Hi all Many, maybe all, statistical packages I know of (R, matlab, root, sas) will allow you to fit data with no associated errors, and give you...

• Replies: 0
• Views: 1,585
05-20-2015, 11:38 PM
49. ### Estimate of Variance

How does one obtain the best estimate of the variance of observations around the fitted model in SPSS? My thinking is that the best estimate of...

• Replies: 0
• Views: 1,464
05-19-2015, 06:36 PM
50. ### Hell Please. Linear Regression Model

Which of the following is NOT assumed to contribute to uncertainty in predicting y from x in a standard Model I linear regression. a. Uncertainty...

• Replies: 8
• Views: 1,612
05-19-2015, 09:42 AM
51. ### Residual variance of OLS regression from R-Squared?

Can residual variance of OLS regression be derived from R-Squared, and if so, how?

• Replies: 2
• Views: 1,723
05-17-2015, 11:51 AM
52. ### logistic regression for customer data

Hey guys, i'm supposed to build a logistic model, but i'm not quite sure how to begin. i have two data sets. One for the customers( all...

• Replies: 0
• Views: 1,071
05-16-2015, 09:16 AM
53. ### New with Stata - Changes in Beta event study question

Hello, I am trying to do an event study regarding beta and check if beta changes after stock splits dates. I am planning on checking if the...

• Replies: 0
• Views: 1,333
05-14-2015, 06:16 PM
54. ### Paired/Matched Sample with Hierarchical Moderated Regression Question

Hello Everyone, I would greatly appreciate some help with this question. I am trying to help a good friend with her dissertation and am now...

• Replies: 0
• Views: 1,157
05-14-2015, 05:14 PM

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