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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### generalized least squares

Hello. How can I modify least square linear regression method in order to fit a straight line to data with non gaussian error (such as Levy, Poisson...

• Replies: 6
• Views: 4,142
08-02-2007, 05:53 AM
2. ### Nagelkerke and overall hit ratio won't improve in my logistic regression model!

Hi! I have a problem doing my course assignment(with SPSS): I can't find a way to improve the overall hit ratio and Nagelkerke levels even...

• Replies: 7
• Views: 4,141
06-14-2013, 03:31 PM
3. ### How to choose best robust regression model?

Hello. There are several robust regression methods like LAR-(aka LAV-, LAD-, L1-Norm-)Regression, Quantil-Regression, M-Estimator, ... They are...

• Replies: 15
• Views: 4,141
03-21-2017, 02:05 PM
4. ### Constant SE from covariance matrix on Multiple Regression

Hi: I'm currently developing a Statistical package on Ruby, called statsample (http://ruby-statsample.rubyforge.org/), and I'm now working on...

• Replies: 1
• Views: 4,134
02-22-2010, 01:47 AM
5. ### 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: 4,134
09-24-2015, 12:55 PM
6. ### Multiple Regression Question

Hello, I have a question about multiple regression. My project involves non-political group involvement predicting political participation. My...

• Replies: 5
• Views: 4,122
02-21-2006, 08:37 PM
7. ### Predicting rare events using weight-adjusted logistic regression

This is a simulation study I adapted from sas website. Suppose my probably follows the following relationship, x=rannor(12342); ...

• Replies: 2
• Views: 4,120
04-09-2014, 02:26 PM
8. ### Logistic regression: constant variance of Pearson residual condition

I am currently trying to create a logistic regression model. I know that for good model's the variance of Pearson Residual should be approximately...

• Replies: 0
• Views: 4,115
12-28-2010, 10:30 PM
9. ### Question: Time-Series-Cross-Section Data

My data: Number of units: 290. Number of years: 4. The units are not sampled. Analysis technique I was thinking of doing an ordinary least...

• Replies: 3
• Views: 4,115
01-30-2012, 06:43 AM
10. ### theory proofs

Hi, I am doing a study guide for my stat test coming up, and got stuck on 3 proofs. They seem a bit confusing to me, and I just keep going in circles...

• Replies: 1
• Views: 4,112
09-30-2010, 04:09 PM
11. ### 'Significant' product-term interaction but no significant simple main effect contrast

:wave: I'm conducting a conditional logistic regression to assess the association between a continuous predictor and a dichotomous outcome,...

• Replies: 6
• Views: 4,111
11-26-2013, 07:43 PM
12. ### Regression on Growth Rates

Hi, Is it possible to run a regression on growth rates? The data set has data for orders and other world parameters like GDP, INCOME,...

• Replies: 0
• Views: 4,103
04-30-2013, 04:27 PM
13. ### Datasets for Multiple Linear Regression - How To get the Raw Data ?

Hello everyone. kindly need ur help.. where can i get the raw data for multiple linear regression. the data should have : Atleast (5 variable)...

• Replies: 2
• Views: 4,102
06-14-2013, 09:22 AM
14. ### Var(Y_knot_Hat)

Hello all, I need a little help with this: Show Var(Y_knot_Hat) = Sigma^2 * (1/n + (x_knot - x_bar)^2 / Sxx) Start with Y_knot_hat = b_knot...

• Replies: 5
• Views: 4,096
09-30-2010, 01:07 PM
15. ### 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: 4,094
Per
09-18-2010, 01:39 AM
16. ### Goodness of fit versus AIC/BIC versus pseudo R squares

This is geared to Logistic regression I understand in theory you use these for different reasons. AIC for comparing non-nested models and goodness...

• Replies: 6
• Views: 4,094
03-25-2013, 10:10 PM
17. ### potential heteroskedasticity & autocorrelation problem with pooled cross-section data

hello 1) my data: i have collected a few thousand property transactions over the last 15 years. for each transaction i have got the price and the...

• Replies: 2
• Views: 4,090
01-11-2012, 03:56 PM
18. ### Multiple regression?

Hi, I'm wondering if it is a bad violation to try to conduct a multiple regression analysis if some of the variables are non-parametric? My...

• Replies: 4
• Views: 4,084
04-13-2006, 09:59 AM
19. ### Correlation between reaction time (RT) and accuracy.

In a two choice task, for each participant, I want to show that the faster is RT, the higher is the probability for incorrect response. Is it...

• Replies: 3
• Views: 4,082
12-24-2011, 01:23 PM
20. ### Any good online lectures of time series introduction?

Hello all: I'm looking to find "good" online videos that provide an introduction to time series analysis (some of the basics, applications....). ...

• Replies: 1
• Views: 4,078
08-05-2013, 01:50 PM
21. ### IV probit and Ivreg

Hello, When I use ivreg in Stata and cluster standard errors my results show that the independent variable is significant. However, when I use...

• Replies: 0
• Views: 4,076
01-23-2012, 02:31 PM
22. ### Regression analysis - normal distribution and linearity

I am using a scale for a paper. The scores are based on 7 questions with Likert-type responses. I want to use it as a dependent variable in a...

• Replies: 0
• Views: 4,071
05-29-2008, 08:32 AM
23. ### Regression brain teaser

I have data for 100 farm ponds. I have data for 4 variables: pollution in the pond, number of cows that graze near the pond, number of pigs that...

• Replies: 3
• Views: 4,069
06-03-2010, 07:41 PM
24. ### Logistic regression problem

Hi, I'm experiencing difficulties with understanding my results despite active googling, and i'd be really grateful, if someone could help me. ...

• Replies: 5
• Views: 4,061
01-18-2012, 11:01 PM
25. ### probit regression with skewed data set

Hi, I have data from a household survey done in urban and rural areas. The sample size was not the same for both areas. if I combine both data...

• Replies: 1
• Views: 4,057
06-14-2012, 04:40 PM
26. ### Regression analysis sample size problem

Hi there, Could anybody offer any advice on a linear regression sample size problem? I am using regression to predict the energy consumption...

• Replies: 1
• Views: 4,057
07-13-2012, 02:52 AM
27. ### Coefficient of Determination

Hi there, I'm using non-linear regression (specially I'm using neural networks for time series prediction) and I'm a bit unsure about the...

• Replies: 2
• Views: 4,055
06-29-2011, 06:14 AM
28. ### Trouble standardizing regression slopes

Dear readers, Hopefully you can help me with the following problem. I am using meta-analytic software to perform a meta-analysis. When I...

• Replies: 0
• Views: 4,041
02-22-2011, 12:46 PM
29. ### Plz suggest good textbook for statistics in regression analysis

Hie. Can anyone please post a good text book or a reference guide for the Multi regression analysis which can explain all the statistics behind the...

• Replies: 0
• Views: 4,033
11-27-2010, 02:13 PM
30. ### Categorical regression question

Hi, everyone Hope the experts here can help me out with a question. I have a database with several respondents providing data on...

• Replies: 5
• Views: 4,025
07-13-2010, 02:47 PM
31. ### Testing interaction effects

I had a few question regarding the testing of interactions. First, should I be centering my variables using the mean and/or standardizing my...

• Replies: 2
• Views: 4,022
04-05-2011, 03:15 PM
32. ### Linear Regression Equation

Dear friends, I have a set of data as follows: 1....... 58.82±3.23 10....... 62.5±7.90 50....... 87.23±2.33 100....... 110.29±10.33...

• Replies: 5
• Views: 4,020
08-11-2006, 12:24 AM
33. ### Binary logistic regression to analyze Likert Scale questionnaire

Hi, I am sort of stuck with the following problem concerning logistic regression analysis in my research on the determinants of technology...

• Replies: 0
• Views: 4,015
04-28-2012, 12:24 PM
34. ### Participant ID - Categorical?

Hi all, I'm performing a Binary Logistic Regression on data from human subjects. I want to ensure that the effect of independent variables is...

• Replies: 0
• Views: 4,013
09-13-2010, 09:44 AM
35. ### tandard errors of the parameter estimates in a quadratic fit

How do I estimate the standard errors of the parameter estimates in a quadratic fit? This page list the estimate for a linear fit:...

• Replies: 2
• Views: 4,009
10-27-2011, 08:06 AM
36. ### Iv probit

Hi, Is there a procedure to estimate a probit model in SAS using instrumental variables, like the IVPROBIT in STATA? Thanks!

• Replies: 2
• Views: 4,005
01-18-2012, 11:26 PM
37. ### 4 DV's in a regression analysis

I need to conduct a Regression analysis with 2 IV's and 4 DV's, I was wondering if this is something that is possible? I want to test out a model...

• Replies: 0
• Views: 4,002
07-23-2010, 11:00 AM
38. ### Interpreting PROCESS Output

Hi everyone, Does anyone know of any good resources to help interpret the process macro output, specifically for model 14? I have the book but it...

• Replies: 3
• Views: 3,988
05-06-2015, 10:11 AM
39. ### PCA questions

here goes... 1. The Kaiser-Meyer-Olkin Measure of Sampling Adequacy and Bartlett's Test of Sphericity tests are done on the standardised or the...

• Replies: 0
• Views: 3,985
04-18-2009, 03:47 AM
40. ### Cluster-robust standard errors needed in random effects model?

Hello, I'm currently working with a company dataset in the form of an unbalanced panel (overall sample size: 1.300 company years, T: 10, X: ~170...

• Replies: 0
• Views: 3,980
04-23-2013, 04:43 AM
41. ### Moderated Multiple Regression Analysis - but with repeated measures too?

Dear stats experts, I have been struggling with a problem the whole day and only found a partial solution so far, which I think is not sufficient...

• Replies: 2
• Views: 3,980
05-30-2013, 01:39 PM
42. ### linear regression short easy question

Hi there, I have the response Y and some covariates. I want to do linear regression. Among the covariates there is the covariate sex (1: male,...

• Replies: 7
• Views: 3,976
06-22-2010, 10:46 AM
43. ### Correct interpretation of Lmer output

I have produced the following model ...

• Replies: 0
• Views: 3,976
04-19-2013, 10:05 AM
44. ### 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: 3,976
08-01-2014, 02:03 PM
45. ### Mutliple Regression with a known coefficient

I'm performing multiple regression on a linear model with several independent variables to generate equations such as: W = aX + bY + cZ X = dW +...

• Replies: 1
• Views: 3,972
02-05-2007, 05:27 PM
46. ### Step by Step by Step help please?

Hello all, can anyone help me understand this step by step understanding of linear regression and correlation?

• Replies: 6
• Views: 3,972
12-03-2010, 04:14 AM
47. ### 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: 3,970
01-23-2017, 12:18 PM
48. ### Coefficients of delta-lognormal modeling

I am trying to understand delta-lognormal modeling. Please bear with me. I am applying this method to some fishery data. This method combines...

• Replies: 2
• Views: 3,968
03-16-2012, 11:38 AM
49. ### Help needed with counter intuitive result in OLS

Hi All, I have a simple linear regression run between say, statements about the impression with a brand on its favorability What i am getting...

• Replies: 5
• Views: 3,967
02-21-2011, 04:48 AM
50. ### Variable selection for multiple regression analysis

Hi everybody there. I want to correlate 2 main variables (say "a" Dependant and "b" independent of course) BUT at the same time i want to add 5 other...

• Replies: 2
• Views: 3,965
04-11-2011, 06:08 PM
51. ### "Best" Multiple (Multivariate) Nonlinear Regression?

Hi all, I'm just getting started in R. I've had good luck finding the right (predictive) correlation weights using orthogonal polynomials in Java....

• Replies: 2
• Views: 3,964
Axl
01-22-2009, 03:05 PM
52. ### same variable: Single regression not stats sig but multiple regression stats sig?

Evening, IMy statistical query is that I am conducting a multiple regression ( step down - ommitting the non significant variables one by one). I...

• Replies: 2
• Views: 3,964
11-09-2011, 04:44 AM
53. ### Regression Analysis and Hypothesis Testing

Can someone please help me out with these questions. Thanks guys. Yhat = 227.3642 + 6.4075Xt Σ (Xt - Xbar)^2 = ΣXt^2 ≈33.43 σˆ2≈35.4198 Xbar =...

• Replies: 12
• Views: 3,964
02-15-2013, 03:46 PM
54. ### Cubic polynomial regression - Correlation coefficient

How to compute the Correlation Coefficient of third degree polynomial regression? Using R and Statgraphics I only get R2, wich I believe that is...

• Replies: 0
• Views: 3,963
11-01-2011, 05:56 PM
55. ### Repeated Measures ANOVA (Split-Plot ANOVA) analysis of residuals

Hi, how to process decent residual analysis in repeated measures? I know that the residuals should have normal distribution (altogether an in...

• Replies: 5
• Views: 3,960
09-10-2013, 07:02 AM
56. ### linear regression -- the regressor X is random

Hi, I am studying linear regression from the book titled, "Introduction to Linear Regression" by Montgomery. I am reviewing some previous...

• Replies: 0
• Views: 3,952
11-26-2011, 02:30 AM
57. ### Logit versus Probit versus Linear Probability Coefficients

Hi all, Fairly simple question... What exactly are the meanings of the coefficients in logit, probit, and linear probability models? I'm staring...

• Replies: 2
• Views: 3,949
11-28-2011, 04:49 PM

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