1. Announcement:
05-10-2017
Views:
1,875
Page 9 of 73 First 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 59 ... Last
Threads 481 to 540 of 4336

# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Theoretical question from Mixed Effects Random Coefficents Multilevel Linear Models

hello people! this is kind of a theoretical question from people who've seen mixed-effects/random-coefficients/multi-level models before or have a...

• Replies: 6
• Views: 2,834
11-03-2011, 12:46 AM
2. ### Model evaluation in logistic regression

I am doing the analysis in very recent forms of SAS (if any use that here). I ran a logistic model with a huge number of data points (some 11,000)....

• Replies: 6
• Views: 6,331
12-02-2011, 04:14 PM
3. ### Help to control on the size effect between two groups (small vz. big)

Hello All, I would like to have your help to solve the size effect. Specifically, I have two group of companies listed on different markets....

• Replies: 6
• Views: 2,883
11-12-2011, 12:44 PM
4. ### Can I trust a regression if variables are autocorrelated?

Hello everyone! Both variables (dependent and independent) show autocorrelation effects. When I run regression and estimate the residuals, they...

• Replies: 6
• Views: 2,752
12-04-2011, 10:59 AM
5. ### two ANOVAs, which to use?

Hypothetical: you have ANOVA tables from two regressions. One is regressed on more variables than the other. The one with more variables, has a low...

• Replies: 6
• Views: 2,525
12-13-2011, 10:12 AM
6. ### P-value in regression analysis

How much should a p-value in a regression model be for the related variable to be considered insignificant?

• Replies: 6
• Views: 13,604
12-25-2011, 02:33 PM
7. ### interpreting log transformed co-effients in linear regression?

Hello, I have 1 continuous dependent and 1 predictor variable that I've logarithmically transformed to normalise the data and their residuals for...

• Replies: 6
• Views: 3,746
12-31-2011, 12:03 PM
8. ### Fitting a model with Bernoulli/Binomially distributed data

I am used to fitting data to estimate parameters in a model f(x,A) where x is my data point and A is the parameter(s) to be determined. To achieve...

• Replies: 6
• Views: 2,707
01-08-2012, 02:44 PM
9. ### Collinearity Among Categorical Variables in Regression

Does anyone have any knowledge and/or experience in how to measure collinearity between categorical variables that have more than 2 categories in the...

• Replies: 6
• Views: 34,848
01-25-2012, 03:52 PM
10. ### Use of regression models with centered variables

Hi all, I'm a little confused about how to use a regression model with centered variables. I know how centering variables works for reducing...

• Replies: 6
• Views: 9,244
02-01-2012, 12:23 AM
11. ### Building a Logisics regression model - help

Audited ~50 patients, and collected 10 potential predictors for each (some quantitative, some indicative, all independent). Trying to develop a...

• Replies: 6
• Views: 2,233
02-09-2012, 06:03 PM
12. ### Linear Regression mystery

A linear model was built, using 2 explanatory variables and 30 observations. the results were: B=(3.57, -0.18, 1.259)^t (the coefficients) ...

• Replies: 6
• Views: 2,469
02-12-2012, 02:11 PM
13. ### I think I may finally understand, but a few questions

Please note that you will find a simplified question below in case you do not have the time to check all of my scripts in the first two posts, but...

• Replies: 6
• Views: 2,031
03-21-2012, 12:28 PM
14. ### Alternatives to Poisson regression for overdispersed count data

Hi all, I'm currently analyzing data from a series of behavioral experiments that all use the following measure. The participants in this...

• Replies: 6
• Views: 2,401
05-04-2012, 11:52 AM
15. ### LME in SPSS and R giving different results

I am trying to do a linear mixed model in both SPSS and R ... well, more precisely, originally I did it in SPSS, but now I want to use resampling to...

• Replies: 6
• Views: 5,382
06-11-2012, 04:31 PM
16. ### Multiple Linear Regression: Transformation, testing of normality, heteroscedasticity

Hello everyone, I have a question that might be a basic one, but still I want to reassure myself that I am not on the wrong path by hearing the...

• Replies: 6
• Views: 4,912
06-28-2012, 09:18 AM
17. ### Sample size of Categorical Variables

Hi, I'm running a binary logistic model that includes categorical variables. One of my main covariates has 8 categories and some of the sample...

• Replies: 6
• Views: 8,014
07-23-2012, 08:17 AM
18. ### (OLS) How to get sample variance-covariance matrix of residuals?

Consider the OLS: (1) y = a + b*x + e Where e is the error term. I understand that the population variance-covariance matrix for the residuals...

• Replies: 6
• Views: 4,967
07-16-2012, 10:02 AM
19. ### reporting descriptive Stats when using gender in multiple regression.

Hi, I am relatively new to research methods and using SPSS. I wanted to perform multiple regression analysis using categorical and continuous...

• Replies: 6
• Views: 4,360
07-19-2012, 02:39 PM
20. ### Moderated multiple regression - comparing interactions with dummy variables

Hello - I ran a moderated multiple regression in SPSS and am having a hard time understanding the results with my dummy codes. IV - rejection...

• Replies: 6
• Views: 3,001
08-02-2012, 12:33 PM
21. ### Newbie Logistic regression/weighted regression

Greetings I have been reading this article http://vassarstats.net/logreg1.html and trying to understand it but I am getting confused at how they...

• Replies: 6
• Views: 2,370
07-31-2012, 05:03 PM
22. ### \hat{SE}(coefficient) OR SE(\hat{coefficient})?

Hi all, Typesetting a table at the moment and would like to know which is correct for the standard error, given the population model Y_t = a + b...

• Replies: 6
• Views: 2,577
BGM
08-10-2012, 01:53 PM
23. ### Dependent variable issues: (i) Mild skewness and (i) Measurement error

Cross-sectional \hat{Y}_i = a + b X_i + e_i over i \in \{1,2,...,300\}. \hat{Y}_i's were estimated in a different regression (specifically, 300...

• Replies: 6
• Views: 1,771
08-17-2012, 10:08 AM
24. ### The claim of homoscedasticity when presenting an OLS specification

From http://web.mit.edu/~kjforbes/www/Papers/AsianFluandRussianVirus-JIE.pdf applied econometrics paper: Why does the author claim...

• Replies: 6
• Views: 2,524
08-22-2012, 10:12 PM
25. ### Multiple Regression Analysis Issue

Hi everyone I have just signed up! I am currently doing a thesis & struggling with my regression model. I am examining the link between profit...

• Replies: 6
• Views: 2,788
09-17-2012, 12:54 AM
26. ### binary logistics for suicide ideation and attempt

Hi, I am doing analysis for relatively large sample of high school students (4000) of predicting lifetime usage of psychoactive substances as...

• Replies: 6
• Views: 1,861
09-12-2012, 05:38 PM
27. ### Multicollinearity and the 'backward' regression method

Hello, Simple question - Am I right is assuming that you cannot use backwards,forwards or best subsets regression techniques if you have two...

• Replies: 6
• Views: 2,776
09-26-2012, 12:22 PM
28. ### Projecting Data - what is the right analysis to use?

I am in healthcare. I have a report have is providing me a unit of service on a daily basis going back three months. What I would like to do is...

• Replies: 6
• Views: 1,829
10-16-2012, 02:11 PM
29. ### Still a count variable?

First off, I hope this is the right forum. I'm not sure which other one would be more appropriate for the question. I have a dependent variable...

• Replies: 6
• Views: 2,065
12-11-2012, 07:22 AM
30. ### Model fit vs. Prediction

When it comes to regression, a lot of people are obsessed (as they should be) with how well a model fits. But what about how well the model can...

• Replies: 6
• Views: 2,863
01-18-2013, 04:53 PM
31. ### HELP regression with percentage and current \$

Hi i am trying to construct a regression with inflation as my dependent variable and gdp and income as my independent, but i am not sure if it can...

• Replies: 6
• Views: 2,472
01-30-2013, 10:17 AM
32. ### Interpretation of odds ratio in logistic regression for a logged variable

Hello, How do we interpret the odds ratio in logistic regression for a logged variable? Thanks in advance.

• Replies: 6
• Views: 3,120
02-08-2013, 08:43 AM
33. ### Categorical variable as dependent variable

I have a categorical variable which is like: "How much do you like the sun?" 1 not at all 2 not a great deal 3 neither/nor 4 quite a lot 5...

• Replies: 6
• Views: 1,982
04-12-2013, 11:28 AM
34. ### 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: 4,083
03-25-2013, 10:10 PM
35. ### OLS regression with dummy dependent AND independent vars

Disregarding whether probit / logit should be used - I just want to verbally interpret results from an OLS regression where my dependent variable y...

• Replies: 6
• Views: 2,896
02-12-2013, 09:15 PM
36. ### Normality assumption for Regression

I have an outcome variable that is composed of one item on a 3 point scale to assess participation (none-1, member of 1 program-2, member of both...

• Replies: 6
• Views: 2,091
02-05-2013, 04:04 PM
37. ### Stepwise regression

Hi there, I wish someone can help. I will be grateful. I ran a stepwise linear regression in SPSS, and one of the signification predictors was...

• Replies: 6
• Views: 1,688
04-11-2013, 02:50 AM
38. ### NonLinear Regression

Hello all, I have a pretty general question: Which nonlinear regression is more reliable when you have a small sample of 50 - 70 size one...

• Replies: 6
• Views: 1,582
06-02-2013, 05:13 AM
39. ### Logistic Regression Problem - HELP!

A local health clinic sent fliers to its clients to encourage everyone, but especially older persons at high risk of complications, to get a flue...

• Replies: 6
• Views: 3,549
05-16-2013, 09:39 AM
40. ### Cross validation in SPSS

Hi, I need to conduct cross validation of my data to check for predictive validity. This is what I did so far. I divided the sample into two...

• Replies: 6
• Views: 13,594
06-19-2013, 03:34 AM
41. ### Mispecification

In theory, or as I understand theory,:p if you leave out a covariate that has a signficant effect on the DV and one IV still in the model you will...

• Replies: 6
• Views: 1,566
07-02-2013, 01:55 PM
42. ### Unequal sample size among sub-groups: Effects on significance levels?

Hello, I just came across a finding which I find somewhat strange: I conducted a quite simple multiple regression analysis in a dataset that...

• Replies: 6
• Views: 5,438
07-25-2013, 02:37 AM
43. ### Multivariate regression

Hello, I am using SPSS 20.0 and am running a multivariate regression using the GLM...

• Replies: 6
• Views: 2,153
07-24-2013, 12:31 AM
44. ### Validating regression models

It is commonly suggested that you use part of the data to generate a model, and then use the rest of the data you withheld from creatng the model to...

• Replies: 6
• Views: 2,395
07-31-2013, 09:13 PM
45. ### Parameters Meaning

What does parameters a and b represent in the equation y = A + B ln(x) ?

• Replies: 6
• Views: 2,525
07-15-2013, 05:43 PM
46. ### Analysis of promotional data by department

Hi all, I have recently started an internship with a major UK retailer. My project is to come up with a model (and analysis) for promotions that...

• Replies: 6
• Views: 1,198
07-15-2013, 08:38 AM
47. ### Understanding coefficient of determination

Hello everybody Im having some trouble understanding R^2. Almost everywhere, people describe it as the amount of the total variance in y that can...

• Replies: 6
• Views: 2,794
07-20-2013, 07:12 AM
48. ### no r-squared calculation for models without the constant

hi, I ran a multiple regression in Minitab and tried the model without the constant. It worked well but Minitab did not give me the r-squared value....

• Replies: 6
• Views: 2,734
08-15-2013, 04:57 AM
49. ### How to test for Multi-collinearity among dummy explanatory variables

Hello, Almost all the explanatory variables in my data are dummy variables and I would like to test for multi-collinearity among them. Does it...

• Replies: 6
• Views: 2,868
08-19-2013, 04:37 PM
50. ### Plot interaction effects

Hi! I already know how to plot the predicted probabilities of binomial models without any interaction terms: predicted logit = a + bX ...

• Replies: 6
• Views: 7,588
09-12-2013, 10:23 AM
51. ### Obtain the least squares estimator b1 of B1.

Given the regression model Yi=B1Xi + ei for i=1,2,...,n. Is the estimator unbiased? So this represents the simple model with B0=0, but I'm not...

• Replies: 6
• Views: 3,301
09-23-2013, 04:32 AM

Page 9 of 73 First 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 59 ... Last

Use this control to limit the display of threads to those newer than the specified time frame.

Allows you to choose the data by which the thread list will be sorted.

Note: when sorting by date, 'descending order' will show the newest results first.