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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### When to specify an interaction effect

I have a model with about 20 variables in it (6 of them are dummies from a categorical variable with 7 levels). All of these are suggested by the...

• Replies: 4
• Views: 1,349
03-08-2016, 01:18 PM
2. ### Linear Regression - Influence of experience on wage

Hello Talk-Stats-Members, i am new to the forum and already have a (in my eyes) complex theoretical problem that i hope you can help me with. I...

• Replies: 4
• Views: 2,179
05-06-2015, 03:30 PM
3. ### 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: 1,250
06-29-2015, 07:06 AM
4. ### 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: 1,404
06-29-2015, 02:45 AM
5. ### Using residuals as predictors to adjust for effects of covariate in regression

I was wondering if this is appropriate: I have two predictors that are highly correlated and collinear, x1 and x2, and are both associated with Y....

• Replies: 4
• Views: 2,213
07-21-2015, 03:50 PM
6. ### What if you are not interested in a variable that has been found to matter in the lit

The article I am working for stresses the importance of a variable that my organization has no interest in at all. It is an important control, should...

• Replies: 4
• Views: 1,918
08-01-2015, 03:28 AM
7. ### Logistic Regression

Hello I am going to start building a Logistic Regression model based on medical data for the purpose of classification. My problem started with...

• Replies: 4
• Views: 2,223
08-16-2015, 01:37 PM
8. ### Dealing with multicollinearity

I have a following model: y=a+b1x1+b2x2+b3x1x2+b4x3+other terms \$ Let's say, I am only interested in coefficient b3. The magnitude of coefficient...

• Replies: 4
• Views: 1,662
09-03-2015, 10:19 AM
9. ### Binary predictor in regression analysis?

I have just had a lecture with a lecturer summarizing regression analysis, and showed us some examples. One of those examples included a regression...

• Replies: 4
• Views: 1,833
09-12-2015, 11:23 AM

Greetings everyone, I'm currently working on my Bachelor thesis relating to behavioral finance. My topic requires me to run a regression analysis...

• Replies: 4
• Views: 2,832
07-24-2016, 02:41 AM
11. ### The best formula to use in excel to forecast daily call volume?

I have used single and double exponential smoothing, but did not know if there is a more accurate approach to predict how many calls that can be...

• Replies: 4
• Views: 6,170
10-01-2015, 01:46 PM
12. ### How to treat missing IV cases in logistic regression?

Hey folks, quick question: I am analyzing consumers advertising click behavior (click/no-click =DV) and two IVs in this model are the location of...

• Replies: 4
• Views: 2,396
09-30-2015, 01:38 PM
13. ### Physics Teacher with a question of appropriate use of regression equaitons

Is it ever acceptable to replace discrete measured values with a continuous function if you are certain you have the right model? For the last...

• Replies: 4
• Views: 2,299
10-11-2015, 01:56 PM
14. ### 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: 1,725
12-12-2015, 01:34 AM
15. ### Tjur's pseuo R squared

Paul Allison recommends this now for logistic regression, but I have never run across it (it has not been formally named this, Tjur is the author who...

• Replies: 4
• Views: 2,927
12-15-2015, 09:05 PM
16. ### Logistic Regression

I am looking at a medical outcome (binary) and known risk factors. There are 10 established risk factors that I will test in my sample of 300...

• Replies: 4
• Views: 1,572
12-18-2015, 10:04 AM
17. ### Query: Using independent variables in regression.

1. When putting in independent variables in regression model, for example "income" and my outcome is health status. I can use income as categorical...

• Replies: 4
• Views: 1,643
12-29-2015, 02:07 PM
18. ### Comparing the outcome of two contingency tables

Hi all, I have a data set for two different days. The treatments and outcomes are same but the assays were performed on two different days. I...

• Replies: 4
• Views: 1,760
01-15-2016, 12:55 PM
19. ### Which test for cont DV, 1 nominal IV (2 cat) + 1 nominal IV (4 cat) + 1 cont IV

Hello, I am a bit struggling with choosing which test I should apply to my data. My dependent variable is continuous (participants could score...

• Replies: 4
• Views: 2,465
01-24-2016, 07:30 AM
20. ### Linear regression with all categorical variables SPSS

Hello, I am running a multivariate regression analysis on the presence of an organism in an infection (dependent variable), and certain risk factors...

• Replies: 4
• Views: 856
04-20-2016, 12:49 PM
21. ### Partial effect plot: Which options do I have?

Hi, I have a multiple regression model, and I would like to do an effect plot with confidence bands regarding one of the predictors. One solution...

• Replies: 4
• Views: 1,685
03-17-2016, 02:21 AM
22. ### "Sensitivty" analysis

I have not encountered this before. It occurs in the context of "mixed effects OLS regression" (not sure exactly what type of regression that is...

• Replies: 4
• Views: 1,493
03-18-2016, 04:10 PM
23. ### How to report a non-significant regression?

Hi guys, For my final year research project, I have a few regression models with non-significant results. I was just wondering what the...

• Replies: 4
• Views: 6,158
03-29-2016, 03:45 AM
24. ### Anova find significant diferrences

Hi all, I have made an one-way anova in order to test if three populations have the same means. My result is to reject the null hypothesis. So,...

• Replies: 4
• Views: 1,334
03-30-2016, 01:17 AM
25. ### Robust regression, bootstrapping and indirect effect

Hi there, I am currently learning to do mediation analysis using bias-corrected accelerated bootstrap confidence intervals, similar to the...

• Replies: 4
• Views: 1,565
Tux
04-01-2016, 07:55 PM
26. ### Confused about my Logistic Regression output (SPSS)

Hi Guys, I've conducted a binary logistic regression using 2 categorical predictors (Static-moving and moving-static) and an outcome variable...

• Replies: 4
• Views: 1,221
04-06-2016, 04:44 AM
27. ### Linear Regression Interpretation

Hi there, I am running a Multiple Linear Regression analysis. I have 2 predictor variables (self-worth and self-acceptance) and 1 criterion...

• Replies: 4
• Views: 1,724
05-01-2016, 08:38 PM
28. ### Multiple Regression Analysis - Two independent variables, one w/same values

Post closed.

• Replies: 4
• Views: 1,558
06-13-2016, 09:23 AM
29. ### Finding predicted values with logged (ln) dependent variable.

Hello all, I'm currently working on my first quantitative project. I am doing an OLS regression in SPSS. I had to take the natural log of my DV in...

• Replies: 4
• Views: 3,757
01-23-2017, 11:16 AM
30. ### Hypothesis for logistic regression

I get a group of data and would like to use the regression to analysis the relationship. The dependent variable Y is a kind of loss rate, so it is...

• Replies: 4
• Views: 2,348
07-27-2016, 12:37 PM
31. ### 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: 1,424
08-24-2016, 10:38 AM
32. ### Interaction effect

Hey guys, I would like to investigate effect of a treatment in randomized control trial. Also, I would like to investigate the moderating effect...

• Replies: 4
• Views: 1,128
08-15-2016, 01:13 PM
33. ### 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: 1,079
09-05-2016, 07:16 PM
34. ### Basic Estimation; Should I use future data?

Hi everyone, I'm new on the forum but had a question to ask that's related to the work I currently do. I'm wondering if we should include...

• Replies: 4
• Views: 1,320
10-23-2016, 10:24 PM
35. ### logistic regression or survival analysis?

Hello, I have two main questions that I hope you help me answer. Let me give you the scenario first. Let’s say that some students in a school are...

• Replies: 4
• Views: 2,414
11-15-2016, 10:41 AM
36. ### Multiple Logistic Regression question

Greetings, I have three categorical IVs and one categorical DV. However, the DV is a self-reported ranking from 1 to 4 (1= not important, 4 = very...

• Replies: 4
• Views: 2,452
12-01-2016, 01:46 PM
37. ### conditional logit model_help with data interpretation

0 down vote favorite I have performed a clogit following the instruction of Aizaki et al.2012 but I am not sure on how to interpret some results...

• Replies: 4
• Views: 2,813
12-09-2016, 09:26 AM
38. ### Linear Regression - Beginner Need Help

Hello everyone, I have a simple exercise to do about linear regressions and models but I have a few doubts. The exercise gives you 2 vectors(let's...

• Replies: 4
• Views: 2,886
12-14-2016, 03:04 PM
39. ### question !!

I am helping my niece in explaining regression analysis by studying by myself and finding problems and trying to solve those. one of the problem has...

• Replies: 4
• Views: 1,089
04-30-2017, 07:58 AM
40. ### Zero inflated negative binomial regression interpreting main and interaction effects

I am running a zero inflated negative binomial model (zinb) and want to interpret the main and interaction effects. I have the following: ...

• Replies: 4
• Views: 1,020
04-22-2017, 02:43 AM
41. ### Newbie Question

Hello, Just wondering if someone could help me. I have a degree in Maths and have done second year Uni Maths stats (but quite a while ago) so...

• Replies: 4
• Views: 779
04-16-2017, 11:31 PM
42. ### Can you include X1/X2 in a model when you've already included X1 and X2?

Can you include X1/X2 in a model when you've already included X1 and X2? For example, I am trying to predict housing prices. X1=square feet and...

• Replies: 4
• Views: 693
04-11-2017, 02:59 PM
43. ### Model validation in regression

I was wondering, for this question and why. I think its in-sample but curious why. 1) Models need to be validated: a. In-sample b....

• Replies: 4
• Views: 956
04-08-2017, 06:58 PM
44. ### Hypothesis interpretation

Dear I'm wondering how I should interpret my hypotheses. The first one is "the relationship between X1 and Y increases as X3 increases" and the...

• Replies: 4
• Views: 896
04-01-2017, 03:09 AM
45. ### When log transformation

Hello, I am a bit confused with WHY and WHEN you should take the log of the dependent variable and/or independent variables, after running a...

• Replies: 4
• Views: 968
03-17-2017, 08:23 AM
46. ### Expert Help Required - Multiple Regression with Nominal and Scale Variables

Hi all, I'm having huge issues with the assumptions of multiple regression and determining whether I am running my analysis correctly. First of...

• Replies: 4
• Views: 2,090
02-27-2017, 01:25 PM
47. ### Comparison of Coefficients of two different Regression Models

Hi everyone, I am analyzing the impact of price and promotion activities on sales in two separate 2-Way-Fixed Effects models. One model is for...

• Replies: 4
• Views: 2,845
01-27-2017, 03:53 PM
48. ### SPSS: regression analysis for 3x2 experiment. How to test for interaction

Dear all, For my research I have the following facts: - I have two categorical IVs: - treatment condition called competition, which has...

• Replies: 4
• Views: 2,739
01-29-2017, 04:19 AM
49. ### Variation in significance Categorical Regression Analysis (CATREG)

Hello, I am doing Categorical Regression Analysis (CATREG) with SPSS. However, every time i run the analysis, the standard error and p-value vary...

• Replies: 4
• Views: 797
05-16-2017, 11:03 AM
50. ### Trichotomizing an Independent Variable

In SPSS, how does one go about trichotomizing an independent variable such that about 33% are in each of the three groups?

• Replies: 4
• Views: 604
06-08-2017, 06:19 PM
51. ### [Linear Regression] Regression with aggregated or separated years?

Hello to everyone! :wave: I should do some regressions but i've an important and simple question... my dataset have this structure: ...

• Replies: 4
• Views: 310
08-25-2017, 12:00 PM

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