1. Announcement:
05-10-2017
Views:
1,946
Page 4 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 54 ... Last
Threads 181 to 240 of 4341

# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Hosmer-Lemeshow

Hi! How do you discussion the vaule for the Hosmer-Lemeshow goodness of fitt in a logistic regression? I tha value 0,290 bad? Regards!

• Replies: 7
• Views: 9,339
04-04-2011, 07:24 AM
2. ### Unstandardized regression coefficient in Multiple Regression Interaction

Hi all, I am trying to interpret a significant cross product interaction in a Multiple Regression and I am getting more and more confused. There...

• Replies: 1
• Views: 9,313
09-06-2008, 01:01 AM
3. ### Time Series - Differencing the data

I'm still trying to teach myself time series and have a bunch of questions about differencing the data. I would be super appreciative if anyone could...

• Replies: 9
• Views: 9,283
09-17-2012, 12:46 PM
4. ### 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: 9,256
02-01-2012, 12:23 AM
5. ### equivalence of t-test and F-test in ANOVA

Something about ANOVA is confusing me. Say you have a regression model: y = b0 + b1*x1 (where b0 and b1 are coefficients and x1 is an...

• Replies: 2
• Views: 9,224
12-26-2010, 11:21 PM
6. ### Logistic Regression - Residual Deviance > Residual Df

Hi There I'm doing a logistic regression on a set of data with 753 groups of observations (although some groups just have one observation). In...

• Replies: 3
• Views: 9,182
04-03-2011, 08:08 AM
7. ### Logistic regression detection of multicollinearity- is VIF applicable?

I have a model with a dichotomous DV and IVs both continuous/numerical and dichotomous. I checked for collinearity with Pearson. How do I check...

• Replies: 1
• Views: 9,168
04-24-2013, 04:36 PM
8. ### Partial r is greater than zero-order correlation

I am puzzled by something I have not come across before. To explain, I have conducted a hierarchical multi-regression with a post-therapy outcome...

• Replies: 1
• Views: 9,151
10-24-2010, 06:05 AM
9. ### Sxx from ANOVA output?

Hi everyone, I have an upcoming test in Stats class. The professor has posted review questions but isn't responding to my questions. Below is a...

• Replies: 2
• Views: 9,108
11-10-2011, 12:52 PM
10. ### 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: 9,091
06-17-2011, 05:10 PM
11. ### Comparing coefficients in Logistic Regression

Hello ! I would like to have guidance on what follows. I was fitting a Logistic Regression model, and I got the coefficients for the model's...

• Replies: 14
• Views: 9,043
06-02-2015, 09:08 AM
12. ### Partial Correlation vs. Multiple Regression

What is the purpose of doing JUST a partial correlation as opposed to a full multiple regression? (In cases where there is a clear outcome variable.)...

• Replies: 2
• Views: 8,991
04-07-2010, 08:40 AM
13. ### How many data points needed before a nonlinear regression model can be performed?

With a within-subject design of only one independent variable, I'm wondering how many data points (levels of the indept variable along X axis) do I...

• Replies: 4
• Views: 8,980
08-09-2010, 03:29 PM
14. ### 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: 8,930
05-28-2014, 03:18 AM
15. ### Regression delivers significant results, but correlation no

Hello there, This is my first posting and I would highly appreciate if someone could help me :) After utilizing the search function, I found no...

• Replies: 3
• Views: 8,927
01-17-2013, 12:13 PM
16. ### 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: 8,892
06-05-2011, 03:51 PM
17. ### Choosing predictor variables to use in multiple linear regression models

I want to figure out what combination (both individual variables and interactions, if any) of independent variables predict my dependent variable....

• Replies: 2
• Views: 8,847
12-18-2011, 11:09 PM
18. ### Logistic Regression on small sample size/case ratio - SPSS?

Hi all - I have a small issue. I have a categorical dichotomous DV (0,1) with 4 IV's , two of which are categorical and dichotomous (0,1), and the...

• Replies: 2
• Views: 8,839
11-03-2014, 10:04 PM
19. ### dummy variable multiple regression

Hello guys, I am doing a project on calendar affects(seasonality) in the stock market for which i am trying to perform a dummy variable regression...

• Replies: 2
• Views: 8,833
02-17-2011, 12:04 PM
20. ### Interpreting Interactions in Binary Logistic Regression

Hi! I was wondering if anyone knows how to interpret interactions in SPSS, for logistic regressions, or how a good source that might outline this....

• Replies: 1
• Views: 8,733
01-13-2011, 08:23 PM
21. ### why is the covariance of my residuals not 0?

hello there. i am trying to wrap my head around the assumption that, in regular OLS regression, the covariance of the residuals is 0. i worked out a...

• Replies: 11
• Views: 8,699
09-30-2011, 12:41 PM
22. ### Partial R squares

Is there a way to generate partial r-squares (automatically) in multiple regression? Assume a Model Y=X1 X2 X3. GLM produces estimates of R square...

• Replies: 3
• Views: 8,626
03-25-2008, 03:58 PM
23. ### Seasonality and dummy variables

Hey, I've got this econometric problem I could use some help with. I'm looking for day of the week effects in a certain index. I'm using a regression...

• Replies: 11
• Views: 8,555
11-23-2011, 05:30 AM
24. ### Linear Regression Coefficient and Multiple Regression Coefficient

Hello Folks: When you use just 2 variables for regression and then when you use the same 2 variables plus an additional 2 other independent...

• Replies: 3
• Views: 8,463
04-07-2011, 08:48 PM
25. ### Multiple Regression with negative constant for price

Hi there, I am carrying out a project study, in which I am studying the relationship between the price of property in three regions in the UK along...

• Replies: 2
• Views: 8,450
03-25-2013, 11:11 AM
26. ### Descriptive research and regression analysis?

Please pardon my ignorance...can I use multiple regression analysis in a descriptive research design to answer my hypotheses? If not, can anyone...

• Replies: 4
• Views: 8,412
09-19-2010, 01:11 PM
27. ### Regressional on likert scale data using spss

Hi guys, I am in a fix!!:confused:. My questionnaires have recently been filled but am yet to figure out how to analyze my data. My topic is "impact...

• Replies: 2
• Views: 8,401
08-26-2015, 08:56 AM
28. ### 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: 8,366
Pen
07-27-2010, 05:31 PM
29. ### Please explain differences between R and r

Hello, I received my dissertation back with comments from the dean. He flagged the following text and added the following comments: Am I...

• Replies: 0
• Views: 8,357
07-17-2009, 11:48 PM
30. ### Ordinal Regression: Parallel Lines Test

Hi All, I'm analyzing survey results with many responses coming in the form of Likert scales. In this case, I actually have two Likert scale...

• Replies: 5
• Views: 8,318
10-31-2013, 12:56 PM
31. ### Ordinal Regression: Test of Parallel Lines

Hi, I am trying to fit a model by using ordinal regression. I have got two co-variates, and one factor with four groups. The dependent variable...

• Replies: 3
• Views: 8,292
08-27-2010, 09:47 PM
32. ### The differences between subdistribution hazard ratios and hazard ratios

Hello everybody! I just wondered if someone knows what the differences is between a subdistribution hazard ratios (sHR) and the hazard ratios...

• Replies: 2
• Views: 8,267
06-05-2012, 06:19 AM
33. ### Large logit coefficient - what it means

I am constructing a logit model with 6 explanators, trying to predict outcomes of hockey matches using odds (the variable I am referring to below)...

• Replies: 12
• Views: 8,189
03-12-2013, 06:06 PM
34. ### calculating adjusted rsquared by hand

Hi. I just wanted to make sure I am doing these calculations correctly. I have 8 models, one with no variables. So to get the adjusted rsquared, I...

• Replies: 1
• Views: 8,189
10-30-2013, 11:59 AM
35. ### unable to make model Hessian positive definite - help!

Hello all, My first time posting here, and really hoping that someone can help me out! I have data from a repeated measures experiment in which...

• Replies: 0
• Views: 8,157
01-16-2012, 10:10 AM
36. ### Post hoc in ANCOVA

I'm trying to conduct a post hoc test on the results of an ANCOVA: > model <- aov(Max~Weight*Diet) > summary(model) But when I run the Tukey...

• Replies: 5
• Views: 8,107
01-20-2012, 07:59 AM
37. ### Relationship between Pearson correlation and variance in regression model

If the correlation between X and Y, say, is 0.5, then the standard deviation of the differences between the Y values and their predicted values on...

• Replies: 14
• Views: 8,089
08-12-2012, 11:33 PM
38. ### Gauss Elimination

Hi guys. Im being asked to program Gauss Elimination in R .Im new using this kind of program. It's simple but i don't know how to start. can someone...

• Replies: 13
• Views: 8,066
06-09-2011, 10:25 AM
39. ### 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: 8,044
07-23-2012, 08:17 AM
40. ### Significant regression coefficient vs. significant overall model

Hi everyone, I have rather a simple question but for some reason have not been able to find a clear answer. My apologies if I have missed a...

• Replies: 2
• Views: 8,043
02-02-2012, 08:51 AM
41. ### Any software to get sample size/power analysis for probit regression?

Hi All, I need to figure out sample size for an upcoming study that will utilize a probit regression to test agreement of a new diagnostic test to...

• Replies: 12
• Views: 8,026
09-19-2011, 12:06 PM
42. ### ridge regression example

Data Display Row x1 x2 y 1 1 1 2 2 5 4 5 3 5 5 6 4 5 6 6 5 ...

• Replies: 4
• Views: 7,992
01-11-2012, 01:43 AM
43. ### Develop analysis plan on Medical data - trend analysis and model

First, let me say thank you for any help you can give. I have been searching for nearly two days for a solution to my problem and continue to be...

• Replies: 1
• Views: 7,969
02-24-2011, 11:20 AM
44. ### Simultaneous causality?

I'm doing some applied econometrics and I'm a bit concerned about the model that I've been asked to estimate. Consider 3 stochastic time series...

• Replies: 3
• Views: 7,904
08-11-2012, 10:14 AM
45. ### simultaneous causality correction?

Hi Based on a data set I have to answer whether the use of tele-diagnosis and tele-evaluation by health professionals in Andalusia has a positive...

• Replies: 2
• Views: 7,883
01-04-2013, 04:44 PM
46. ### analyzing residual plot by hand

Hi! Thanks in advance for looking at my query. I have a very basic question regarding regression. We have to analyze a residual Plot by hand. We...

• Replies: 1
• Views: 7,874
12-06-2010, 07:54 PM
47. ### Combining Prediction Intervals

I'm having trouble finding how to combine a number of prediction intervals. The best way to explain the problem is: Imagine a race with 4 relay...

• Replies: 4
• Views: 7,856
07-22-2010, 04:12 PM
48. ### variance for multiple regression model

studying for a test.. any help appreciated.. Consider the multiple regression model Y = Xβ + ϵ, where X is n x (k+1) matrix, β is a vector of...

• Replies: 5
• Views: 7,817
06-22-2012, 03:47 AM
49. ### (SPSS) Multinomial Logistic Regression- testing IIA- Hausman-McFadden

hi all, I am using SPSS 20 to analyze survey data. I am using Multinomial Logistic Regression and have come up with three "models", containing...

• Replies: 2
• Views: 7,760
Syd
02-28-2013, 09:08 PM
50. ### How to check the importance of Dummy variable in multiple regression?

Hi All, I am doing a Multiple regression with one non numeric independent variable. I changed this variable into a dummy variable which is now...

• Replies: 2
• Views: 7,718
01-02-2011, 04:33 AM
51. ### Confusion over the F-ratio in a hierarchical multiple regression

Hey all, I'm not used to work with multiple regression analysis, so I would be glad if anyone could help me interpreting this result: I...

• Replies: 1
• Views: 7,656
08-26-2013, 09:33 AM
52. ### Combining Regressions

Hi, I have several different regressions for various sites within an area estimating Y from X. I would like to combine all these sites in to...

• Replies: 3
• Views: 7,655
12-28-2007, 11:31 AM
53. ### test of non-linearity

I am reading an interesting econometric book where the author suggests testing if non-linearity exist by specifying a quadratic term, if its...

• Replies: 15
• Views: 7,651
06-30-2016, 02:24 PM
54. ### Multiple regression - Best predictor

Hello there! I am studying for a final exam next week and I'm not sure about this. How do we determine the "best predictor" in multiple...

• Replies: 2
• Views: 7,643
05-04-2011, 08:23 AM

Page 4 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 54 ... 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.