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Dason ‎(Devorador de queso)
05-10-2017
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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### 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: 362
08-04-2017, 01:31 PM
2. ### 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: 317
08-01-2017, 03:22 AM
3. ### 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: 358
07-31-2017, 08:49 AM
4. ### 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: 302
07-28-2017, 06:33 PM
5. ### 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: 425
07-21-2017, 11:16 AM
6. ### 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: 566
07-21-2017, 07:21 AM
7. ### 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: 451
07-21-2017, 03:05 AM
8. ### 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: 330
07-20-2017, 06:40 AM
9. ### 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: 820
07-10-2017, 06:56 PM
10. ### 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: 749
07-10-2017, 06:42 PM
11. ### 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: 543
07-07-2017, 01:42 AM
12. ### 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: 747
07-06-2017, 03:25 AM
13. ### 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: 319
07-01-2017, 11:22 PM
14. ### 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: 464
06-27-2017, 12:46 PM
15. ### 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: 740
06-26-2017, 11:20 AM
16. ### 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: 518
06-26-2017, 08:28 AM
17. ### 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: 474
06-22-2017, 05:04 PM
18. ### 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: 667
06-17-2017, 09:50 AM
19. ### 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: 1,005
06-09-2017, 11:56 AM
20. ### 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: 828
06-09-2017, 05:29 AM
21. ### 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: 380
06-09-2017, 03:32 AM
22. ### 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: 434
06-08-2017, 10:16 PM
23. ### 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: 692
06-08-2017, 06:19 PM
24. ### 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: 906
06-07-2017, 02:33 PM
25. ### 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: 965
06-05-2017, 09:44 PM
26. ### 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: 786
06-05-2017, 03:35 PM
27. ### 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: 1,037
06-05-2017, 08:32 AM
28. ### Master thesis, statistics check!

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

• Replies: 12
• Views: 3,026
06-02-2017, 03:24 AM
29. ### 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: 670
06-02-2017, 12:10 AM
30. ### Repeated measures question

Hello. I have taken day to day repeated measures in number of predictor variables as well as some other ordinal dvs. I want to meaure the effect of...

• Replies: 6
• Views: 3,431
05-31-2017, 04:14 AM
31. ### Seek non-black box alternative to random forest

I've recently had a research manuscript rejected by an editor. The manuscript showed that for a real life data set, random forest outperformed...

• Replies: 1
• Views: 1,483
05-30-2017, 11:55 AM
32. ### Regression for river level prediction

I am an avid whitewater kayaker. Many streams have US Geological Survey (USGS) gauges on them. However, some of the best do not. I would like to...

• Replies: 1
• Views: 792
05-30-2017, 09:00 AM
33. ### Regression

Hi How I can use regression analysis?

• Replies: 2
• Views: 721
05-28-2017, 09:41 PM
34. ### R square read with or without confounder in the analysis

Hey, My bachelor thesis is about fatigue, nausea and cognitive decline in patients who have head and neck radiation. For example, the dependent...

• Replies: 2
• Views: 980
05-28-2017, 06:38 AM
35. ### Logistic regression with both positive and negative values for independent variable?

Hi guys, I have a general regression question. Is there an issue with doing a logistic regression with both positive and negative values in the...

• Replies: 2
• Views: 1,132
05-27-2017, 01:12 PM
36. ### Deviance residuals in model fitted via MCMC

I fitted a regression model in a Bayesian approach via MCMC. The JAGS code for the model is model{ for(i in 1:n) { y ~ dbeta(alpha, beta) alpha...

• Replies: 0
• Views: 917
05-26-2017, 09:39 PM
37. ### linear regression practice

I wanted to check over my answers based on these questions Thanks (1) True/False: Clustering is an unsupervised learning problem. (2) ...

• Replies: 2
• Views: 1,777
05-26-2017, 01:20 AM
38. ### Interpretation of Logistic Regression with Python, Pandas & Statsmodel

Hi guys, I am new to regression analysis and I am trying to figure out how to interpret my results. I basically did a logit regression in Python...

• Replies: 8
• Views: 1,720
05-24-2017, 03:30 PM
39. ### Bootstrapping pairwise not listwise, a problem with N

Hi! Hoping someone more statistically minded can help. I have a number of variables with different N (they are performance measures and some...

• Replies: 1
• Views: 1,510
05-24-2017, 11:01 AM
40. ### Clustering

i) T/F:Principal Components Analysis can be used to create a low dimensional projection of the data for use with clustering. For this one above, I...

• Replies: 0
• Views: 1,075
05-24-2017, 03:25 AM
41. ### SAS question

Hi all, I was stuck on the following. I explained it below, my approach, and would appreciate any help. Thanks so much. 1) T/F: Common factors...

• Replies: 0
• Views: 844
05-24-2017, 03:20 AM
42. ### Exponential Smoothing and how it Relates to Changing Seasonality Cycle Intervals

How does exponential smoothing treat seasonality when there are different time intervals to the seasonality. It seems that I have to designate a...

• Replies: 0
• Views: 704
05-23-2017, 04:01 PM
43. ### Problem with results in ordinal regression...

Hello and thanks in advance for any response... I have 60 likert-type questions (5 items) (and their responses of course...) and age. Age as raw...

• Replies: 3
• Views: 1,281
05-22-2017, 08:44 PM
44. ### Linear regression / trend question - basic question

Sorry for basic question: I have a series of measurements taken at weekly intervals for a period of 20 weeks. Each measurement is a proportion:...

• Replies: 6
• Views: 1,211
05-19-2017, 09:07 AM
45. ### Whats is the method to analyze characteristics from two groups?

Hello there, Im new in the statistics world and i hope that you can help me. i have two groups of sample that are divided by one y (depended)...

• Replies: 3
• Views: 983
05-19-2017, 08:25 AM
46. ### Having trouble with my units in regression analysis.

Hello, I am attempting to regress future currency returns against changes in economic variables (GPD, inflation, index values etc). I am having some...

• Replies: 0
• Views: 734
05-17-2017, 05:07 PM
47. ### 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: 919
05-16-2017, 11:03 AM
48. ### Comparing regression coefficients between two groups –> violation of independence?

Hi all, I have a question about the comparison of regression coefficients of two groups (using SPSS) and I think this is the correct sub forum for...

• Replies: 1
• Views: 1,985
05-15-2017, 03:47 PM
49. ### Condition to put regression analysis zero?

Under what situation intercept can be force to zero in regression analysis?

• Replies: 11
• Views: 1,723
05-14-2017, 10:36 PM
50. ### ARIMA estimation technique

Hello, I am using SAS to forecast with ARIMA. I need to choose between two methods, conditional least Squares and MLE. Which technique do you...

• Replies: 8
• Views: 2,482
05-13-2017, 01:03 PM
51. ### When the Outcome and Predictor Variables are (sort of) the same

Hello, everyone, I am working on a study with sensitive information, so it may suffice only to look at the last two paragraphs for my question,...

• Replies: 7
• Views: 1,130
05-12-2017, 07:11 PM
52. ### Regression Analysis Practice

I'm working through some practice on regression analysis and wanted to confirm. My attempt is below. Thanks (1) The correlation between two...

• Replies: 3
• Views: 1,768
05-10-2017, 12:00 PM
53. ### Translate multinomial logit regression parameters into binomial

Hello, I have those parameters from a multinomial logit regression that explains Education (L/M/H) by language (Dominant/Other Europe/Non-European)....

• Replies: 0
• Views: 614
05-10-2017, 06:12 AM

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