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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### cox regression and change

I'm no statistician, but a porgrammeur. I have some statistics during my study, but is not really one of my stektste points. 'm Trying to calculate...

• Replies: 0
• Views: 2,190
09-24-2010, 09:27 AM
2. ### Cox/ Binomial Regression: How to reconcile Non-significant model with significant IVs

Hello I'm been performing some survival and regression analyses corresponding to an event of interest being death or a certain surgical procedure,...

• Replies: 2
• Views: 1,903
04-07-2015, 06:03 PM
3. ### Creating an indicator variable of a single observation

Hello, Could somebody explain the rational for creating a dummy variable for a single observation in a regression analysis. Why would you do it? ...

• Replies: 0
• Views: 1,927
04-29-2012, 06:26 AM
4. ### Creating composit variables

I have a literature supported construct and I need to join two variables together (one is a count of people <1K and the other is a count of things...

• Replies: 0
• Views: 1,190
06-18-2014, 08:06 AM
5. ### Creating predicted probabilities from a categorical IV in a logit (with syntax)

So. I have a binary outcome that is begin predicted by a race IV which has 4 categories. here is my output: LOGISTIC REGRESSION VARIABLES...

• Replies: 2
• Views: 1,141
07-09-2015, 06:10 PM
6. ### Criterion for outliers

Hi, I have a simple question, what's the best way to report the criterion you used to identify outliers? I used casewise diagnostics, outliers...

• Replies: 4
• Views: 3,128
02-22-2013, 03:34 AM
7. ### Critique my endogeneity proof.

solved solved

• Replies: 0
• Views: 1,814
06-23-2012, 07:03 AM
8. ### Cross check the regression equation correctness

People, i have this problem From the following data obtain the two regression equations Sales 06 02 10 04 08 Purchase09 11 05 08 07 i...

• Replies: 0
• Views: 1,717
06-23-2011, 01:09 PM
9. ### Cross sectional Regression Analysis

Hi, I am a currently doing my coursework on the factors impacting on the dividend policy in the financial sector in Mauritius. The problem is that...

• Replies: 1
• Views: 2,460
11-19-2011, 01:23 PM
10. ### Cross validation

Hello, I have a basic question about cross validation and regression model. what is the final regression model made from? I mean the final model...

• Replies: 5
• Views: 2,956
10-01-2015, 12:07 PM
11. ### Cross validation bandwith selection

Hi, is there a package in R for cross-validation optimal bandwith selection for nonaparemtric regression/autoregression functions estimation? (for...

• Replies: 1
• Views: 3,758
06-18-2011, 09:52 AM
12. ### 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: 13,628
06-19-2013, 03:34 AM
13. ### Cross-sectional dependence, heteroskedasticity and serial correlation

*** solved

• Replies: 0
• Views: 877
10-24-2016, 02:51 PM
14. ### cross-validated AUC

Hello All, I hope the thread's title makes sense to you. I need to perform internal Cross-Validation using k-fold CV (needless to say, to assess how...

• Replies: 10
• Views: 2,261
11-27-2015, 03:32 PM
15. ### Crossing point

Dear all, My question is How to find out the crossing point of two curve in a graph by using r software? Mr.S.Sivarajah

• Replies: 2
• Views: 3,348
08-21-2013, 09:11 AM
16. ### 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: 3,968
11-01-2011, 05:56 PM
17. ### cumulative odds ratios - additive or exponential?

I have run some regression models that examine the effect of variable X (a 15 point continuous scale) on Y (a binary variable - didn't perform/did...

• Replies: 3
• Views: 3,245
10-31-2013, 11:49 AM
18. ### curvature

I have a set of data that i would like to find out if it has a curvature. i was told that you can apply ANOV analysis to see if curvature is...

• Replies: 1
• Views: 1,526
11-16-2012, 11:57 PM
19. ### Curve Estimation in SPSS

Hi all, I have 2 variables: time & cost - Time: 0%, 10%, ..., 100% (11 variables) - Cost: 11 variables I want to use 'Curve Estimation' in...

• Replies: 0
• Views: 2,770
04-25-2014, 01:26 AM
20. ### Curve fitting of individual or multiples curves

Hi, In curve fitting, Is it acceptable to perform a curve fitting of multiples curves overlaped in the same plot or is it neccesary to fit each curve...

• Replies: 0
• Views: 998
07-13-2014, 11:11 AM
21. ### cut-off point for binary logistic regression without ROC curve

Hi! I just want to know how to find a relatively good cut-off point for binary logistic regression model. I haven't learnt anything on ROC curve. Is...

• Replies: 0
• Views: 5,881
05-06-2012, 11:29 AM
22. ### Cutoff points in logistic regression

One of the articles I am reading now makes reccomendations for changing the cuttoff point used in predicting whether Y=1 or 0. My question is, since...

• Replies: 6
• Views: 13,412
03-27-2014, 08:17 AM
23. ### Damage Assessment

I apologize for this question being exceedingly vague, but I'm not sure of the correct terminology. After running a regression analysis, I have...

• Replies: 4
• Views: 3,064
05-25-2008, 09:07 AM
24. ### Data for regression analysis

I am helping a friend with a project involving regression analysis. First off he wants to know if there is a way to determine if the extracted data...

• Replies: 4
• Views: 2,399
c2q
05-07-2011, 11:53 AM
25. ### Data forecast

Hello, I'm not exactly sure if this is the right forum, or even if what I'm looking for is actually called data-forecasting, but here's my question...

• Replies: 1
• Views: 1,017
07-31-2016, 03:17 PM
26. ### Data input- ordered logistic regression

Hello, I am trying to analyze the relationship between mode familiarity and Technology & demographic characteristics. So I have an ordinal dependent...

• Replies: 0
• Views: 1,725
01-05-2017, 09:09 AM
27. ### Data Mining Methods with Nested Data

I have three general questions that I am really struggling to answer: a) When we have nested data (e.g. employees nested in departments which are...

• Replies: 0
• Views: 1,733
05-27-2014, 02:24 PM
28. ### Data Normalization

I have a problem that is challenging to me about fitting coefficient parameter. Here is the problem data (simple example) ...

• Replies: 1
• Views: 1,659
04-10-2015, 01:43 PM
29. ### Data problem

I need a little help about a guidance how to represent "unlimited" as a value in regression variable. For example, some phone plans includes...

• Replies: 2
• Views: 1,424
01-09-2015, 07:34 PM
30. ### Data Question

Ok I am trying to look at the relationship of sales

• Replies: 5
• Views: 1,970
11-10-2011, 04:02 PM
31. ### Data scattered around y=x

Hello everyone, I am a researcher in engineering. I do have some background on statistics and mathematics in general, but I am not a professional...

• Replies: 14
• Views: 1,511
04-25-2017, 08:15 PM
32. ### Data set simulation

• Replies: 1
• Views: 2,171
07-07-2016, 01:12 PM
33. ### Data Transformations in Multiple Regression

I have a non-normal distribution for the residuals I'm testing for a multiple regression--what's the best course of action to take? If I transform...

• Replies: 1
• Views: 4,351
06-03-2011, 09:07 PM
34. ### 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: 4,104
06-14-2013, 09:22 AM
35. ### Date as a Covariate

Hi, I am looking at the effect of various weather variables on sub-population size of a certain species of snake. Sub-population size at the study...

• Replies: 3
• Views: 2,100
02-28-2014, 12:01 AM
36. ### DEA Analysis

Hi, I'm currently looking for some materials on DEA Analysis. Do you guys have any e-books or good webpages on this topic? I seek a material...

• Replies: 5
• Views: 1,994
04-16-2015, 06:57 AM
37. ### Dealing with endogenous independent variables (Car Industry Project)

I am running a regression on vehicle demand (vehicle registrations in 2011) with the following independent variables: Assembly location Price...

• Replies: 0
• Views: 1,192
04-12-2013, 01:27 PM
38. ### Dealing with missing data?!

Hi guys, I was wondering if anyone can help me figure out what to do, I am pretty bad at statistics but needs must and all that! :p Basically...

• Replies: 7
• Views: 6,609
04-24-2011, 12:51 PM
39. ### Dealing with missing values

I am analyzing the data of a cohort study.There are three sets of paired data (same measures on same subjects in 3 different point of time). The...

• Replies: 2
• Views: 1,439
09-27-2016, 06:54 AM
40. ### Dealing with multi-level categorical variables in regression

Hi everyone, I have been working in R and using lmer() to run mixed-effect linear and logistic regression models to study language processing. ...

• Replies: 0
• Views: 5,930
02-16-2011, 02:37 PM
41. ### Dealing with multicollinearity

I have a following model: y=a+b1x1+b2x2+b3x1x2+b4x3+other terms \$ Let's say, I am only interested in coefficient b3. The magnitude of coefficient...

• Replies: 4
• Views: 1,707
09-03-2015, 10:19 AM
42. ### Dealing with Null values in Differenced Data

Hi everyone, I'm running a regression analysis to try and explain the effect of advertising on brand interest. Essentially, what I want to be able...

• Replies: 0
• Views: 2,234
11-08-2010, 08:40 PM
43. ### Dealing with outliers

We have this discussion from time to time, but it has become more pertinant to me now... Before I begin I should note that I am not really interested...

• Replies: 7
• Views: 3,539
12-30-2014, 10:16 PM
44. ### Dealing with temporal autocorrelation

Hi, assume we have a measured value for each year from 1990-210, and we want to estimate a linear trend. Now there is a problem of...

• Replies: 2
• Views: 2,781
01-10-2017, 11:39 AM
45. ### Death to Stepwise

A chapter title in a regression book I once read :p This article notes problems with the use of stepwise in the way it is commonly used....

• Replies: 0
• Views: 1,516
04-11-2013, 11:40 AM
46. ### Decomposing a regression coefficient - Desperate for help

Hi, I apologize in advance if this is a very stupid question but I cannot for the life of me figure out how to do this. I want to regress the...

• Replies: 0
• Views: 1,048
03-08-2014, 04:11 AM
47. ### Defining relation of a fold over design

Dear All, I am reading the book DC Montgomery on my own. The book says that the defining relation for a foldover design will have L + U - 1 words...

• Replies: 0
• Views: 1,174
10-18-2016, 01:50 PM
48. ### Degree of Freedom in extra sum of squares

Give the degrees of freedom associated with a)SSR(X_1|X_2) b)SSR(X_2|X_1,X_3) c)SSR(X_1,X_2|X_3,X_4) d)SSR(X_1,X_2,X_3|X_4,X_5)

• Replies: 0
• Views: 1,174
11-21-2015, 12:29 PM
49. ### Degrees of freedom for a moving average?

Can someone please help me to determine the correct number of degrees of freedom used when calculating a moving average? For example, with annual...

• Replies: 0
• Views: 5,645
Joz
09-11-2012, 12:36 AM
50. ### Degrees of Freedom in case of multiple regression?

What does dof of each predictor show in case of multiple regression? Instead of explaining mathematically, could anyone explain the physical...

• Replies: 3
• Views: 4,415
07-19-2010, 10:21 AM
51. ### Deleting unhelpful observations from model?

Hi, I'm using panel data on the sales of various products to estimate price elasticities, which basically means running a regression model that...

• Replies: 0
• Views: 1,238
07-10-2012, 11:28 AM
52. ### Delogging variables

Hey, I have run a multiple regression. DV is change in the log of assets Parameter Expected Sign Parameter (T stat) Chlnx ...

• Replies: 0
• Views: 1,142
09-25-2014, 03:18 AM
53. ### Dependent / conditional regression?

Hi there! Long time lurker, first time poster (first post in ANY board), so my sincerest apologies if I'm doing anything wrong! I have searched...

• Replies: 0
• Views: 2,041
08-11-2009, 05:23 AM
54. ### Dependent categorical variable

If y is a dependent categorical variable (values 1,2,3) , then how would you show that y is dependent on x1 and x2? My rational is to use a...

• Replies: 2
• Views: 1,704
02-13-2012, 01:57 PM

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