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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### combining error terms for two dissimilar regressions

I have a linear regression for Y on X, and a power regression for Z on Y, each having associated error. (the Y values are different (independent) in...

• Replies: 13
• Views: 313
Yesterday, 02:36 PM
2. ### Fixed effects / clustered standard error in multi-level data

Hi everyone :) I'm analyzing the effect of political corruption on the bid-ask spread of US political entities, namely my data set consists of...

• Replies: 0
• Views: 65
Yesterday, 08:22 AM
3. ### Estimating impact of Predictor

Hi, I have a simple regression with 24-36 months of data, let's say of Sales which is the dependant variable and % spend on promotions in that...

• Replies: 3
• Views: 111
09-22-2017, 08:59 AM
4. ### Spend against views/day. Include days of no spend?

Hi everyone, just looking at doing some simple linear regression and I've got views on an article. Occasionally we choose to spend a bit of money...

• Replies: 0
• Views: 99
09-20-2017, 11:41 PM
5. ### Residual Modelling and Generating Scenarios for variables

newbie here with a trivial question. i am trying to create scenarios on a set of macro variables. i started with creating a bayesian VAR model on...

• Replies: 0
• Views: 78
09-20-2017, 09:33 PM
6. ### OLS vs solving a system of linear equaions

If i want to solve y=Xb, where y is a vector of observations and X a matrix of independent variables i could use ordinary least squares to estimate...

• Replies: 11
• Views: 369
09-20-2017, 08:06 AM
7. ### two sided multivariate

Hi, I have a question, what will I do with this? In univariate analysis, if the population standard deviation σ is known, the appropriate...

• Replies: 0
• Views: 77
09-19-2017, 03:25 AM
8. ### ANOVA with multiple imputed Data

Hello :) I used multiple imputation on my data to get a complete data set. I want to do a ANOVA now. Does anybody know how to do that correctly? ...

• Replies: 23
• Views: 787
09-15-2017, 04:15 AM
9. ### Logistic regression - a very simple question

I have a question regarding the likelihood. I am trying to assess the likelihood of being in a family history positive group (FH+) on alcoholism (0...

• Replies: 13
• Views: 669
09-13-2017, 06:03 PM
10. ### Repeated Measures - moderation / two outcomes issue

Hey folks! By what procedure can I test whether the association between two dependent variables D1 and D2 changes as a function of within-subject...

• Replies: 0
• Views: 118
09-13-2017, 12:03 PM
11. ### Power analysis for time series regression

Hello, I'm trying to determine the sample size I need for a study. In the analysis, I will be including three predictors (score on a questionnaire,...

• Replies: 1
• Views: 160
09-08-2017, 04:50 AM
12. ### backwards stepwise multiple regression, collinearity. Rejected paper.

Hi helpful people! My research paper was recently rejected and some of the feedback I received was in relation to the statistical tests done/not...

• Replies: 13
• Views: 452
09-06-2017, 05:53 PM
13. ### Firth regression and AIC-based model selection

Dear all, when using Firth's bias reduction method (Firth 1993) to fit logistic regressions, is it possible (sensible) to compare models using AIC? ...

• Replies: 4
• Views: 272
09-01-2017, 03:41 PM
14. ### Question on Impact of Independent Variable Interpretation

Hi, Suppose i have a normal linear regression construct, like Sales = Intercept + M1*X1 + M2*X2 + M3*X3 Suppose X1,X2,X3 are the...

• Replies: 3
• Views: 225
09-01-2017, 03:30 PM
15. ### Fixed vs. Random Effects

I'm wondering if someone could help me to correctly identify whether certain variables should be considered fixed or random effects. Just as...

• Replies: 6
• Views: 290
08-29-2017, 04:43 AM
16. ### [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: 276
08-25-2017, 12:00 PM
17. ### Interaction effects regression wiith dummy variables

Hello everyone, I am doing an analysis about the export diversification effect during the financial crisis. I have my dependent variable as log...

• Replies: 5
• Views: 287
08-25-2017, 09:19 AM
18. ### How to handle dummy variable with fraction as possible values

Hello , I am working on a data with a dummy variable values not just 0 or 1. It has fractions as values which denote the number of month within a...

• Replies: 5
• Views: 440
08-13-2017, 05:27 AM
19. ### Interaction / Moderation effect linear regression

Hi, I have a question regarding a moderation effect with linear regression. I have hypothesized for a significant main effect and another...

• Replies: 6
• Views: 460
08-12-2017, 11:34 AM
20. ### Determine Confounding using Multivariate analysis

After we adjusted for confounders in the Multivariate analysis, How do we determine that if the variable is confounding or not? I read somewhere...

• Replies: 1
• Views: 176
08-11-2017, 02:04 PM
21. ### high correlation among interaction terms

Y= alpha+ b1*x1 + b2*x2 + b3* x3 +b4*x4 + b5*dummy1*x1+b6*dummy1*x2 + b7*dummy1*x3 +b8*dummy1*x4 I run the correlation between all the regression...

• Replies: 0
• Views: 191
08-10-2017, 06:11 AM
22. ### Relative impact of regressors on Y.

A question I get asked a lot is, if we have these three predictors of Y, which of the 3 has the most, next most and least impact. I have tried...

• Replies: 12
• Views: 2,968
08-07-2017, 07:31 PM
23. ### Correlation among a paired multiple vairable for a special case

Hi all, I've run into a stats problem that I can't figure out. I have a pair of linked variables (x,y) that I want to correlate with a third...

• Replies: 1
• Views: 216
08-07-2017, 06:41 PM
24. ### Odds ratios for multilevel categorical variable

Hi, I have a categorical variable with three levels that represent disease severity (0=no disesase, 1=mild, 2=severe disease) and I have put it...

• Replies: 3
• Views: 224
08-04-2017, 01:31 PM
25. ### matrix iv and dv

hi all The independent variable i got is a 52x16 matrix The dependent variable i got is also a 52x16 martix (This is one variable) what kind...

• Replies: 0
• Views: 195
08-01-2017, 03:22 AM
26. ### Easy Bayesian Statistics

Well the thread title was to get your attention. About a month ago I attended a workshop on Bayesian statistics. It introduced the basic principles...

• Replies: 1
• Views: 251
07-31-2017, 08:49 AM
27. ### Looking for references on Passing-Bablok curve fitting.

Hi, I am computer programmer and I need to implement the Passing-Bablok method in one application I have. Yet, I am a little stuck since I don't...

• Replies: 0
• Views: 189
07-28-2017, 06:33 PM
28. ### Coefficient sign varys over the distribution of the dependent variable

Hi, Lets say I am estimating a linear regression with Y as a continuous DV and X as a binary IV. Based on theoretical reasons I am assuming that...

• Replies: 1
• Views: 339
07-21-2017, 11:16 AM
29. ### Modeling portfolio using multiple regressions

Hi All, I'm wondering about the viability of this task. I'm looking to form something similar to an investment portfolio, which aggregates...

• Replies: 2
• Views: 383
07-21-2017, 07:21 AM
30. ### Negative Binomial Regression and Type I Errors

Hi, I've completed three test of negative binomial regression. One test had 14 independent variables, and the other two had 7 independent...

• Replies: 2
• Views: 307
07-21-2017, 03:05 AM
31. ### Calibration set for PLS regression

Hello everyone, New to this forum and kind of wondering why I hadn't thought to search for one before tonight... I hope a light at the end of the...

• Replies: 0
• Views: 233
07-20-2017, 06:40 AM
32. ### Checking assumptions regression categorical predictors

Hi, I am doing a regression analysis on review star rating of VR headsets as a dependent variable and 14 attribute dummies. Each dummy is an...

• Replies: 2
• Views: 514
07-10-2017, 06:56 PM
33. ### Importance of vars in linear regression (R)

I have a question that is and R question and a statistical question: I am analysing sales of a retailer. These sales are related to some vars:...

• Replies: 2
• Views: 443
07-10-2017, 06:42 PM
34. ### Regression against the mean

Hi, the data behaves in a certain way. It has the tendency to regress to the mean as well as is correlated to another factor Y. Is it correct to do a...

• Replies: 1
• Views: 451
07-07-2017, 01:42 AM
35. ### Log-transforming Only the Dependent Variable

For the regression: ln(gestation) = 5.28 + 0.0104×Birthweight For the birthweight and gestation data, Minitab tells us that coefficient of...

• Replies: 8
• Views: 520
07-06-2017, 03:25 AM
36. ### How do I run a moderator analysis within zero-inflated negative binomial(ZINB) reg?

How do I run a moderator analysis within zero-inflated negative binomial(ZINB) regression? I do have independent variables (Social Network...

• Replies: 0
• Views: 259
07-01-2017, 11:22 PM
37. ### Reporting Dummy Variables and Determining Significance

Hi all, I was just wondering, how does a person determine the significance of a categorical variable in a hierarchical regression model if one...

• Replies: 1
• Views: 359
06-27-2017, 12:46 PM
38. ### between-subject variation PROC MIXED in SAS

I haven't used mixed models for long and can't remember much about it. So here's a silly question. Suppose below is my program to model a repeated...

• Replies: 2
• Views: 462
06-26-2017, 11:20 AM
39. ### Using a dummy variable to model threshold effects

Hi All, I'm new to this thread and very green/inexperienced in using regressions. I'm trying to model threshold effects in a time series analysis -...

• Replies: 0
• Views: 300
06-26-2017, 08:28 AM
40. ### HLM - non-linear IV and placement of individual characteristics in the model

Hi all! I am working on my dissertation and run across a couple of questions when structuring HLM model. The data looks as follows: I conducted an...

• Replies: 0
• Views: 323
06-22-2017, 05:04 PM
41. ### How to use Regression to solve this task

Hi, I am new to statistics and in uni we use SPSS to solve statistical problems. I have difficulty to orientate how to solve a problem with...

• Replies: 1
• Views: 502
06-17-2017, 09:50 AM
42. ### Distribution of fixed effects

Hi all, Let me shortly introduce my research: I am looking at whether companies outperform each other in investments. To do this I observe them at...

• Replies: 3
• Views: 728
06-09-2017, 11:56 AM
43. ### Multiple rows per respondent

Hey everyone, I have 6 rows of data per respondent and I'd like to perform a linear regression analysis. I'm just not sure about 1 thing. My...

• Replies: 2
• Views: 580
06-09-2017, 05:29 AM
44. ### Compare regression coefficients of two settings with similar samples

Dear Statisticians, For my thesis I am currently examining whether the accounting principles have an influence on the relation between having a...

• Replies: 0
• Views: 295
06-09-2017, 03:32 AM
45. ### Comparing effect sizes of two longitudinal linear relationships

Is there a way to determine if one longitudinal linear relationship is significantly stronger than another? I was planning on using regression...

• Replies: 2
• Views: 330
06-08-2017, 10:16 PM
46. ### 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: 494
06-08-2017, 06:19 PM
47. ### Regression: Multiple Independent Variables by Year

Hello All! First time here and working in SPSS. I'm having a difficult time running a regression using test score proficiency as my dependent...

• Replies: 1
• Views: 601
06-07-2017, 02:33 PM
48. ### When are residual plots ok?

In general you want a random scatter in the residuals. You want no obvious patterns. I know that is the theory. But what does that really mean in...

• Replies: 2
• Views: 645
06-05-2017, 09:44 PM
49. ### Regression Analysis

Hey everyone, I have a regression model where I have as a dependent variable daily stock prices over 365 days for multiple stocks. I am...

• Replies: 2
• Views: 551
06-05-2017, 03:35 PM
50. ### Multiple regression V.S. Bivariate regression

Hi there, I'm interested in the effect of several variables on severity of schizophrenia symptoms. I want to look at the effect of 9 predictor...

• Replies: 3
• Views: 730
06-05-2017, 08:32 AM
51. ### Master thesis, statistics check!

About me: Medical student with minimal statistical knowledge or research experience Question related to: statistical regression/correlation...

• Replies: 12
• Views: 2,338
06-02-2017, 03:24 AM
52. ### Analyzing Tagged Content: Is a Multiple Regression Analysis the Right Approach?

I’m working with a relatively small data set that consists of several hundred social media posts, key engagement metrics and up to 10 content “tags”...

• Replies: 1
• Views: 537
06-02-2017, 12:10 AM

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