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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### How to antilog a regression

Hi, My excel regression produced the following: Coefficient Constant 6.5804 Log(Unit_Produced) -0.4752 The...

• Replies: 4
• Views: 9,891
12-11-2011, 05:12 PM
2. ### Polynomial regression...how to solve a complex quadratic equation

Hi, The regression in question is: y= 216.44 -109.37X + 25.969 X^2 - 1.7699 X^3 where y = strength of strand board and X = amount of glue used...

• Replies: 1
• Views: 4,756
01-02-2012, 01:30 PM
3. ### Quasipoisson rregression interpretation

Hi, I am trying to do a quasipoisson regression to know if the frequency of drinking of my subject is related to temperature. The problem is that...

• Replies: 1
• Views: 1,910
09-15-2012, 06:12 PM
4. ### [SOLVED] Logistic Regression - Confidence Intervals

Hi I'm running a logistig regression in SPSS 16.0 and have come across the following issue: when testing for different confidence intervals (95%,...

• Replies: 3
• Views: 2,090
01-10-2012, 12:27 PM
5. ### SPSS Logistic Regression Predicts Too Many Negatives?

Hello everybody, I have a logistic regression model, where the outcome Yes is coded as 1, No as 0. The split between Yes and No is about 30/70...

• Replies: 6
• Views: 1,652
08-01-2015, 02:28 AM
6. ### Incremental update to *existing* Logistic Regression model?

Hi, In our work, we have a large-scale logistic regression model we hate to train everyday. Is there a way we can somehow update the existing...

• Replies: 6
• Views: 8,918
05-28-2014, 03:18 AM
7. ### Logit regression - before vs after intervention

Hi. Can anyone please tell me if I can use "year" as the DV when comparing two periods (2011 before intervention; 2012 after intervention), using as...

• Replies: 2
• Views: 1,327
04-17-2013, 10:16 AM
8. ### interaction in non-linear m. - interpretation not directly drawn from coefficients?

Hi all, I read a paper (http://www.sciencedirect.com/science/article/pii/S0165176503000326) about interpretation of interaction terms in...

• Replies: 0
• Views: 778
04-23-2013, 06:41 AM
9. ### Include trend in a Poisson regression

Hey, I'm doing a research about the impact of a co-payment rise policy in the ER. My outcome variable is the number of visits in a week and my...

• Replies: 0
• Views: 1,535
04-23-2013, 06:31 AM
10. ### Interaction effect significant but main effects not

Hi all, I was wondering if anyone could give me a help with my logit. I have a DV of disease vs. non-disease and 3 IV: dummy-year (year 1 vs year...

• Replies: 12
• Views: 20,810
05-06-2013, 01:46 PM
11. ### overall significance - interaction terms with dummy variables

Hi all, Can anyone please help me with a begginer's doubt: when we have an interaction term between one variable (X1) and a cat variable (3 cat. 2...

• Replies: 0
• Views: 1,497
05-14-2013, 06:16 PM
12. ### Hosmer and Lemeshow Test is significant

Hi all, can anyone tell me if one can still use a model which reports a H&L test with significant chi-square? (I have a very large sample - + 100...

• Replies: 25
• Views: 19,802
05-16-2013, 09:49 AM
13. ### Interaction terms - lower level isn't significant!

Hi there. I'm running a model with a 3 level interaction which is significant. I included all the two levels interactions which make the basis for...

• Replies: 1
• Views: 1,600
05-26-2013, 11:48 AM
14. ### Regression Discontinuity

Hi... I'm trying to define a model for estimating the impact of a political program (increase in user fees). I thought about using the RD since...

• Replies: 7
• Views: 2,316
07-30-2013, 11:20 AM
15. ### Interaction effect in a DID analysis

Hi, I had a little argument with my thesis advisor, who said that I couldn't operate with the coefficients of my model without doing a "likelihood...

• Replies: 1
• Views: 1,446
01-02-2014, 05:26 PM
16. ### To zero or not to zero - Count models

Hi all, I hope you could give me a help in modelling the data I have on the visits to an Emergency Service. I have data on the number of visits...

• Replies: 0
• Views: 1,096
01-28-2014, 07:57 AM
17. ### moderator as a categorical variable -- really desperate please help!!!!

1. how do you conduct moderation analysis in SPSS when the moderator is a categorical variable (3 levels represented respectively by +1 (active...

• Replies: 2
• Views: 2,745
01-19-2012, 12:29 AM
18. ### who can help me with multiple regression analysis???

I've calc correlation coefficients between several variables. The results are very promissing, since showing high correlation. The multiple...

• Replies: 1
• Views: 3,401
09-19-2005, 06:44 PM
19. ### By which dimension to cluster standard errors in linear regression?

Hello, This is my first post to this forum. All direct help, as well as references to other sources discussing the subject, are greatly...

• Replies: 0
• Views: 2,051
12-13-2012, 07:18 AM
20. ### Polynomial regression: how to plot several regression lines on same graph.

Hi there, I am currently working on my thesis which is concerned with abnormality of differences between index scores on an intelligence test. An...

• Replies: 3
• Views: 2,413
02-24-2014, 03:31 AM
21. ### Multiple regression models, AIC and PASW

Hi. I would like to calculate AIC values from the different models I have created via stepwise multiple regression in the program PASW (SPSS). I...

• Replies: 2
• Views: 8,354
Pen
07-27-2010, 05:31 PM
22. ### positive and negative beta

G'day. I was wondering, in my multiple regression model, I added only all positive or all negatively correlated independent variables thinking...

• Replies: 1
• Views: 5,196
07-29-2010, 05:44 PM
23. ### Regression or Correlation?

I have collected a range of genetic and non-genetic factors from a series of natural populations and I want to know if; a) how close the correlation...

• Replies: 2
• Views: 3,031
Pen
08-15-2010, 08:55 PM
24. ### i need solution to regreesion

hi dear friend i want the solution manual to the regression og montgomery i searched a lot of in the web but i cant find a free one. if...

• Replies: 0
• Views: 925
01-10-2014, 05:05 PM
25. ### effect size in multiple linear regression

Hello, I have (from SPSS) many multiple regression analyses, and each one has about 7-8 independent variables. I need to find the effect size-in...

• Replies: 1
• Views: 3,137
07-04-2012, 06:44 AM
26. ### Interpreting multiple regression analysis

Hello, I hope someone knows what the answer is to my question: I have a multiple regression analysis. Dependent variable is performance (time)...

• Replies: 5
• Views: 1,757
08-01-2013, 12:39 PM
27. ### cox model with time dependent covariate

I am trying to fit a cox model: h(t, beta) = h0(t)exp(X*beta), while X = (x1, x2, ..., xN) but, for instance, x1 is binary with value of 0 or 1,...

• Replies: 1
• Views: 1,693
02-20-2014, 11:37 PM
28. ### number of variables for a model

I am now trying to build a cox model: h(t, beta) = h0(t)exp(X*beta) I have selected some variables from the data, and for a category variable, if...

• Replies: 8
• Views: 3,082
03-25-2014, 06:05 PM
29. ### How to select the training dataset

I have a dataset which contains dependent variance Y and several independent variances X1, ... , X10. Y has 5 possible values: A, B, C, D, E, a...

• Replies: 2
• Views: 1,723
03-22-2014, 02:48 AM
30. ### Model with discrete variables like step function

I have some data and I want to use a model such as linear regression to describe the relationship between y and x. 2001 2002 2003 2004 2005...

• Replies: 1
• Views: 962
06-23-2014, 11:10 AM
31. ### 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: 2,377
07-27-2016, 12:37 PM
32. ### disattenuated correlations

Objective: a guess about the actual correlations between two variables based on correlations between somewhat noisy variable estimates. The variable...

• Replies: 0
• Views: 4,086
Per
09-18-2010, 01:39 AM
33. ### 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: 3,255
07-06-2015, 03:21 PM
34. ### How to visualize linear multiple regression?

Hello, I have data from measuring und now i have made linear multiple regression to describe one size from five another sizes. I have get an...

• Replies: 3
• Views: 1,805
08-15-2016, 07:25 AM
35. ### What Kind of Regression Do I Need for This?

I have a data like this. I need to find 7 predictors' coefficients for the best model to predict dependent. It can only be 1 and 0. A B ...

• Replies: 6
• Views: 1,139
09-09-2016, 03:09 PM
36. ### 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: 2,485
01-24-2016, 07:30 AM
37. ### dummy regression - unequal sample sizes

Hello, I am conducting a linear regression analysis in SPSS with different variables: - scale, - 2-level nominal, - 5-level nominal (dummy)...

• Replies: 0
• Views: 1,214
05-15-2016, 09:50 AM
38. ### Stepwise Regression Help

Hi, Statistics is not my strong suit and I could really use some help. I'm wondering if it is possible to do a stepwise regression with 9 IVs on...

• Replies: 0
• Views: 2,095
04-07-2015, 04:00 PM
39. ### Moderator regression: plotting graphs from multiple product terms

This is my first time posting, so apologies if I don't make sense. I've conducted a hierarchical regression analysis. I have multiple IVs whereby...

• Replies: 0
• Views: 949
08-13-2014, 10:57 AM
40. ### Nonlinear regression of non normal asymetric data

Hi! I have a set of data that is dependent on 3 dependent variables. The data is collected over a time period tvice a day. I have a theoretical...

• Replies: 1
• Views: 2,600
09-01-2011, 01:35 PM
41. ### Does endogeneity affect the R-squared estimated in variance partitioning?

Hi, I have a likely very simple question but I can’t get my head around the answer. I want to estimate which part of the variance in a firm's...

• Replies: 1
• Views: 870
05-03-2017, 11:07 AM
42. ### 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: 1,611
06-14-2015, 10:12 AM
43. ### Urgent help needed

what sort of anaylsis should I use if I am trying to find the relationship between earthworm densities and soil properties (pH and organic matter...

• Replies: 1
• Views: 1,568
05-27-2013, 12:15 AM
44. ### What's the meaningful difference between an odds ratio and a regression coeffecient?

Moved from here: http://www.talkstats.com/showthread.php/65740-What-s-the-meaningful-difference-between-an-odds-ratio-and-a-regression-coeffecient ...

• Replies: 0
• Views: 1,259
07-08-2016, 09:49 PM
45. ### Precautions when using multiply imputed data in pooled OLS regression

Dear all I am doing a straightforward pooled linear regression on a panel dataset (45 countries, 20 years) using OLS and relevant time dummies and...

• Replies: 0
• Views: 1,982
05-20-2011, 04:17 AM
46. ### how to calculate the significance of an R2 increase (based only on results in paper)

Recently I have come across several articles that report OLS results of models with increasing numbers of variables. In the articles the R2 and...

• Replies: 19
• Views: 21,777
11-17-2011, 09:27 AM
47. ### 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: 1,351
03-30-2016, 01:17 AM
48. ### Log-Linear

Hi all, I have a sample data of Mortality vs GDP. I need to make a Log-linear regression analysis. I transformed the data to log scale and then...

• Replies: 0
• Views: 854
04-03-2016, 07:08 AM
49. ### Instrumental variables in system of equation

Hi everybody, I have a simultaneous equation model in which I want to forecast long term rates in USA and Europe with Eviews. I want to use TLS to...

• Replies: 0
• Views: 540
03-20-2017, 10:12 AM
50. ### How to approach model selection

Hi, This is my first formal attempt at a regression analysis that we hope to write up and submit. Basically we're wanting to investigate the effect...

• Replies: 4
• Views: 2,944
05-21-2011, 02:07 AM

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