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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Selecting Variables for Multiple Regression (Univariate Significance Levels)

Hi All! I really hope someone can answer my question. I am building multiple linear regressions and I am testing salient variables one by one at...

• Replies: 9
• Views: 3,753
08-28-2013, 07:35 PM
2. ### Logistic regression with significant coefficient but .000 Exp(B)

I am getting an output for a binary logistic regression I can't quite figure out how to interpret. It is a 0/1 binary logit, with 10 numeric IVs....

• Replies: 9
• Views: 6,036
01-03-2014, 04:32 PM
3. ### hierarchical regression

Hi, I am trying to analyse my stats results from a three step hierarchical regression and the correlation coefficients tell me that most of my...

• Replies: 9
• Views: 2,512
03-01-2014, 12:30 PM
4. ### Regression on count data

Is it a problem if different observations have different "birth times"? If we want to predict mean count per month (via poisson regression for...

• Replies: 9
• Views: 2,023
05-12-2014, 11:01 PM
5. ### Correlation between two non stationary time series

Hey everyone, I'm trying to figure out if there is significant correlation between two non stationary time series (e.g. temperature on a a given...

• Replies: 9
• Views: 3,957
08-01-2014, 02:03 PM
6. ### cooks distance cutoff

Hello, I urgently need to find out what is happening in regards to below: I am doing a huge number of simple linear regressions. For each...

• Replies: 9
• Views: 10,434
08-08-2014, 10:18 PM
7. ### What is a "count" in regression

It is often said that you should use Poisson regression with data that involves counts. But it seems to me that most of data in the social science is...

• Replies: 9
• Views: 2,515
08-11-2014, 08:51 PM
8. ### Plot for multiple regression

Hi All, I have a very basic question. When I run a regression to predict Y from X, I basically draw a scatterplot in excel. I am wondering how...

• Replies: 9
• Views: 2,852
08-12-2014, 06:03 PM
9. ### What does R, R square , Adjusted R square, STD error of estimates helps for ?

Hello After I run out the regression analysis, can someone enlighten me what can I get from R, R square, STD Error estimates and the adjusted r...

• Replies: 9
• Views: 3,545
12-08-2014, 06:40 PM
10. ### 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: 3,230
03-11-2015, 11:56 AM
11. ### 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: 2,825
02-25-2015, 05:31 AM
12. ### 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: 2,715
03-12-2015, 12:54 AM
13. ### multilevel modelling: predicting random effects for new clusters

Hi: I have a query I'm hoping someone may be able to help with. I've chatted to a few people and looked at texts and the literature but haven't...

• Replies: 9
• Views: 2,954
04-28-2015, 11:13 AM
14. ### p-value of a coefficient from a regression

The t-stat value follows a two-tail symmetric t-distribution with mean and median of zero? Am I correct so far? If so, then how can you get a...

• Replies: 9
• Views: 2,175
08-04-2015, 04:54 PM
15. ### help required urgent

A sample of 12 homes sold last month in Minot is selected. Can we conclude that as the size of the home (in square footage) increases, the selling...

• Replies: 9
• Views: 2,652
09-02-2015, 08:15 AM
16. ### If B predicts A, can A also predicts B?

Hi everyone, I'm new to multiple regression analysis. I have a question and I hope someone can help answer it. Thank you. In a multiple regression...

• Replies: 9
• Views: 4,115
09-24-2015, 12:55 PM
17. ### Nominal predictor with 70 levels....

I have a nominal level predictor with 70 levels (its units that provide some service). I want to analyze how these units preform on an interval...

• Replies: 9
• Views: 2,616
12-16-2015, 01:44 PM
18. ### Pleease help!? Filling in "blanks" in Regression Output

Hello! Can someone please explain, I need to fill in the blanks marked They provide this info in a row: Coeff:-9074.674 Std.Err: ?? ...

• Replies: 9
• Views: 3,212
01-07-2016, 07:42 AM
19. ### What to do about violations of assumptions

This is one example of a larger topic Say you are doing logistic regression and you have influential data points. You can't use robust regression...

• Replies: 9
• Views: 1,423
01-25-2016, 06:01 PM
20. ### Multiple regression with interaction - and dummy variables?

Hi guys! So, here's the deal. I'm in a bit of a pickle here :shakehead I'm currently struggling with a take-home exam where I'm having trouble...

• Replies: 9
• Views: 1,652
03-31-2016, 09:07 AM
21. ### Likert Scale as dependent variable

Hi all, I have a question regarding the analysis of my survey data. I have created one variable of seven likert scale variables after conducting...

• Replies: 9
• Views: 2,803
04-20-2016, 04:11 PM
22. ### Relative impact

I circle back to this question every few years, it is becoming critical these days and my readings have not turned up a strong consensus on this...

• Replies: 9
• Views: 3,246
06-27-2016, 11:02 AM
23. ### Regression assumptions

this comes from Introduction to Econometrics by Stock and Watson. On page 161 they note in a footnote "....it might be helpful to note that some...

• Replies: 9
• Views: 1,874
06-27-2016, 05:48 PM
24. ### Binary Logistic Regression Assumptions Testing

Hi there, I am having difficulties testing some of the assumptions while conducting a binary logistic regression for an exploratory study. 1....

• Replies: 9
• Views: 1,457
09-03-2016, 03:05 AM
25. ### Poisson regression for Count data

Hello Every one, I'am working in Toxicological lab, Where we deal with animal data. I have to perform Poisson Regression for count data but i...

• Replies: 9
• Views: 2,717
09-28-2016, 06:38 PM
26. ### Log regressions

So between these two log regressions: 1) transform y into log but keep X normal 2) transform both the y and x into log When or what would be a...

• Replies: 9
• Views: 985
04-19-2017, 02:15 AM
27. ### what to do with "bad" logistic regression results

I ran a simple logistic regression in R and here are my results. my independent variables are all "counts" and I coded my Y as 0 and 1. This is a...

• Replies: 9
• Views: 3,951
01-23-2017, 12:18 PM
28. ### Spearmans test...?!

Im conducting a project and it is based on radiographs, basically i look at a radiograph and decide how difficult it is likely to be i have done this...

• Replies: 8
• Views: 2,902
03-29-2008, 01:29 PM
29. ### Testing for difference 2 regression models

Hello, I am working on multiple regressions at the moment and have come to a point that I need a little assistance. I have the following question:...

• Replies: 8
• Views: 25,969
11-29-2008, 11:29 AM

Hello, I was wondering if you could please offer any advice as I appear to have got rather muddled. I am writing a resesarch proposal, and I...

• Replies: 8
• Views: 2,891
12-10-2008, 11:14 PM
31. ### adjusting a proportion score (controling for age)

I have 20 yes/no ratings (did this product help you). People were able to rate as many of the 20 products as they used (on average people rated 5...

• Replies: 8
• Views: 4,369
12-15-2008, 11:23 PM
32. ### multiple comparisons

Hi, I'm a vet doing a research project, but am not really strong in stats. I have a question about whether correction for multiple comparisons is...

• Replies: 8
• Views: 3,278
02-13-2009, 02:12 AM
33. ### Collinearity in Logistic Regression

If my independent variables are correlated in Linear Regression, I can first, check it using VIF, and solve it (PLS, other ways). What do I do if...

• Replies: 8
• Views: 27,082
08-24-2010, 01:50 AM
34. ### Confidence Intervals for Estimates in Multinomial Logistic Regression

Hello all, Is there a way to calculate a confidence interval for the estimates occurances of a dependent variable when using multinomial logistic...

• Replies: 8
• Views: 8,863
06-05-2011, 03:51 PM
35. ### problem with MR

Hi, I have a problem with the results of MR and I hope somebody can help me:) conducting MR with Enter method, I got a model which is not...

• Replies: 8
• Views: 2,576
02-24-2011, 04:01 PM
36. ### Impossible exam question!

I just got done taking an exam by an evil and cruel professor who likes to throw in problems that he's never discussed in class, never assigned for...

• Replies: 8
• Views: 4,487
04-29-2011, 11:00 PM
37. ### covariance and variance of BLUE

Consider an RBD with 5 replications and 4 treatments t_1,t_2,t_3,t_4. We are given the following three treatment-contrasts: \frac{t_1-t_2}{2}...

• Replies: 8
• Views: 2,632
06-12-2011, 11:13 AM
38. ### Interaction Term in Logistic Regression

I'm reading Kutner, et al., Applied Linear Statistical Models (5th), and came across something I don't recall the authors explaining. I vaguely...

• Replies: 8
• Views: 9,039
06-17-2011, 05:10 PM
39. ### Regarding negative correlation and negative variance estimation result

In ANOVA, we sometimes talk about that variance estimation can get negative result when there is negative correlation. I do not understand what...

• Replies: 8
• Views: 5,302
09-12-2011, 11:32 PM
40. ### Analyses of count data for seedling survival: poisson or logistic regression?

Am I dealing with survival data (binary) or count data, and which is the best statistical analysis? I have counted seedlings surviving in each of...

• Replies: 8
• Views: 3,893
08-01-2012, 04:42 AM
41. ### Multiple Regression Question

This is my data: Bars

• Replies: 8
• Views: 3,244
11-10-2011, 02:17 PM
42. ### Regression table interpretation problem

Hello all, I am a complete beginner in statistics but I have come across a table I need to interpret for my research. Although it's probably a...

• Replies: 8
• Views: 3,245
02-29-2012, 09:58 AM
43. ### Regression with non- parametric data....

Hello! I have conducted the normality test Anderson-Darling on my data, and with a p value of <0,010, I guess that the data are not normal...

• Replies: 8
• Views: 5,604
03-26-2012, 03:42 AM
44. ### Logistic regression convergence issues

Hi Folks! I'm using logistic regression for classifying records into groups. The issue with logistic regression is that if any cell in the...

• Replies: 8
• Views: 6,823
04-04-2012, 01:12 PM
45. ### Regression analysis of more than two independent and dependent variables

Hello, I want to find the relationship between independent and dependent variables using regression analysis. There are 5 IV and 4 DV. Please...

• Replies: 8
• Views: 5,433
05-14-2012, 09:50 AM
46. ### Sigmoid curve

Hi, Is it possible to linearise data for a sigmoid curve? To be clear, I do not mean a logistic function! The data are not between 0 and 1! I...

• Replies: 8
• Views: 4,376
06-12-2012, 04:39 PM
47. ### Calculating R^2: to use or not use the least-squares line

Dear Stats Forum, I am a grad student with an introductory stats background. For my research, I'm conducting an experiment to compare two types of...

• Replies: 8
• Views: 1,593
07-21-2012, 05:37 PM
48. ### Error contribution from covariance in linear regression

Hello, I try to consider the covariance in the error analysis of a linear regression with few data points. I could not find for this a worked...

• Replies: 8
• Views: 3,064
08-02-2012, 08:07 AM
49. ### Poynomial Regression through the origin

I am trying to program in SQL a polynomial regression of degree two with a zero intercept. I can't seem to find the appropriate literature on this...

• Replies: 8
• Views: 4,202
07-24-2012, 05:50 PM
50. ### Problems with R^2

Hi, I have an assignment in which measurements of 5 independent variables were measured for 1 dependent variable. The first questions asks which of...

• Replies: 8
• Views: 2,422
09-29-2012, 01:59 PM
51. ### Dummy Coding of Variable and interpretation

Discussion One of my IV in my regression analysis is religion 1=Catholic 2=Jewish 3=Protestant 4=muslim 5=other 6=none I recoded religion as...

• Replies: 8
• Views: 2,765
11-29-2012, 01:43 AM
52. ### Variable selection in multiple regression based on regression itself results

Hi everybody, I have a question relative to the multiple linear regression. Here is the case: Y=dip var x1, x2, x3= indip var suppose that I have...

• Replies: 8
• Views: 2,047
01-25-2013, 10:04 AM

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