1. 10-14-2010
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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Leave one out cross validation

Hi everybody, I've done a linear regression analysis with forward selection method. my number of observations are 32 and the final model selected 2...

• Replies: 3
• Views: 1,014
10-06-2015, 02:09 AM
2. ### Problem with Greene Econometric Analysis 7th Edition demand example page 110

Strange question, I know, but I am unable to reproduce the results shown when he adds a lagged dependent variable to his gasoline demand function....

• Replies: 0
• Views: 443
Rod
10-04-2015, 10:53 PM
3. ### Automatically finding relationships between 3 or more variables

Hello, Total newbie here - but I'm hoping someone can help me out. I have finished running a multiple regression analysis and have my results....

• Replies: 0
• Views: 463
Tzo
10-02-2015, 08:37 PM
4. ### The best formula to use in excel to forecast daily call volume?

I have used single and double exponential smoothing, but did not know if there is a more accurate approach to predict how many calls that can be...

• Replies: 4
• Views: 1,438
10-01-2015, 02:46 PM
5. ### 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: 672
10-01-2015, 01:07 PM
6. ### how to calculate co-efficients

Hi all, This is my first post on this forum. Lets say I have, x vectors (-0.0028, 5.0028, 10.0085, 15.0085, 20.0028) y vectors (0, 5, 10, 15,...

• Replies: 7
• Views: 965
09-30-2015, 11:10 PM
7. ### How to treat missing IV cases in logistic regression?

Hey folks, quick question: I am analyzing consumers advertising click behavior (click/no-click =DV) and two IVs in this model are the location of...

• Replies: 4
• Views: 606
09-30-2015, 02:38 PM
8. ### Estimate or Contrast Statement in ANOVA

Hey, I was asked to review a student's paper. In it they have 2 exposures groups and multiple continuous outcomes they are examining. They...

• Replies: 1
• Views: 530
09-30-2015, 12:00 PM
9. ### Confused about how to proceed

Hi all, I have Y vectors = (0, 5, 10, 15, 20) At Condition1, x Vectors = (-0.0056, 5.0000, 10.0057, 15.0057, 20.0000) At Condition2, x vectors =...

• Replies: 1
• Views: 454
09-30-2015, 03:51 AM
10. ### Normal logistic regression vs a mixed model; which to use? benefits gained?

I have some evidence to suggest that one vaccine was far superior over another and resulted in the local elimination of a disease. Because it affects...

• Replies: 6
• Views: 801
09-29-2015, 12:23 PM
11. ### Linear, step wise regression vs binary logistic regression - which method to choose

Dear friends I have a dilemma about choosing a right logistical method. i want to find predictor factors of life satisfaction and have 5...

• Replies: 7
• Views: 796
09-29-2015, 08:46 AM
12. ### Use predicted values or residuals in the second stage?

Hello all: I have a panel dataset (firms) in which some variables are "choice" variables (that is, they reflect executives' free choices as well...

• Replies: 0
• Views: 227
09-28-2015, 07:29 PM
13. ### Strange results in univariable linear regression when groups are stratified

Dear Forum users, I am stuck with some unusual results and would appreciate some ideas as to why/how this happened. I’m testing the relationship...

• Replies: 1
• Views: 505
09-27-2015, 08:18 AM
14. ### Poisson model on moving averages: non-discrete

I have a model that is based on counts of cases. It follows a poisson distribution quite well but we are unhappy about the results of the model. In...

• Replies: 1
• Views: 546
09-26-2015, 06:45 AM
15. ### Regression and imputing zeros

Hi all! I have what is likely a simple regression problem. I am imputing Variable X from survey Y to survey Z. I am using a simple linear...

• Replies: 2
• Views: 628
09-24-2015, 03:16 PM
16. ### 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: 848
09-24-2015, 01:55 PM
17. ### How to deal with repeated measures data in multiple linear regression?

Hello, I am a novice in the area of regression analyses, and was hoping someone could shed some light on my situation. I will be conducting a...

• Replies: 8
• Views: 815
09-22-2015, 04:51 PM
18. ### Is it linear regression ?

Hello , according to https://en.wikipedia.org/wiki/Polynomial_regression#Definition_and_example the equation is linear regression . I...

• Replies: 2
• Views: 537
09-22-2015, 11:54 AM
19. ### Help with First Differencing in STATA

Hello I am a student working with STATA for the first time. I am using panel data for the English Premier League football from 2010 to 2015 and am...

• Replies: 1
• Views: 702
09-22-2015, 03:43 AM
20. ### Correcting for regression to the mean in mixed effects model of longitudinal data?

Hey everyone, I know you can correct for regression to the mean for two time points, in a before and after scenario. But does anyone know how to...

• Replies: 0
• Views: 422
09-21-2015, 03:35 PM
21. ### Time Series Regression Approach

My goal is to predict monthly S&P 500 values using a single indicator data set (For example, Unemployment Rates ) My approach has been to extract...

• Replies: 1
• Views: 466
09-20-2015, 05:52 PM
22. ### Linear mixed models? MANOVA? I'm confused...

I’m a newbie in statistics and R, so I hope that my question isn’t too banal for you. I’m going to carry out an experiment in order to verify...

• Replies: 0
• Views: 428
09-20-2015, 02:44 PM
23. ### Reporting the formula for a mixed model in a paper

I want to report the basic formula of my mixed model. Everywhere I look for a template the equations seem way too complicated for a journal whose...

• Replies: 1
• Views: 449
09-20-2015, 08:08 AM

I have a data for my lesson, but i can not run it in probit. I can not understand the total observed in probit what it is. Or help my run by probit...

• Replies: 2
• Views: 535
09-18-2015, 08:35 AM
25. ### Spatial econometrics:heteroskedasticity and autocorrelation consistent(HAC) estimator

Good afternoon, I have quite basic question however I would like to be sure in this. If I use a HAC estimator of the variance-covariance (VC)...

• Replies: 0
• Views: 505
09-18-2015, 08:13 AM
26. ### reading excel file /text file in R

I am naive programmer..i am working on regression analysis. when i say read.table("filename.txt",header=FALSE)..where does R searches for the file?...

• Replies: 6
• Views: 598
09-17-2015, 11:25 PM
27. ### Stepwise Logit Regression - Drop of variables

Dear All, I have a small question I hope you could help me with. I am trying to find a predictive model for a dataset doing a stepwise logit...

• Replies: 0
• Views: 531
09-13-2015, 10:57 PM
28. ### Binary predictor in regression analysis?

I have just had a lecture with a lecturer summarizing regression analysis, and showed us some examples. One of those examples included a regression...

• Replies: 4
• Views: 748
09-12-2015, 12:23 PM
29. ### Is R2 of multiple linear regression with 1 sign. predictor = R2 of simple lin. regr?

Hi everyone I always thaught that the resulting R^2 of a multiple linear regression with only 1 significant predictor would be equal to the...

• Replies: 11
• Views: 850
wep
09-10-2015, 11:52 AM
30. ### how to prove COV(y bar, estimated beta1) in linear regression equals 0

Yi=Xi*beta1 + beta0 + error Prove: COV(average of Yi, estimated beta1) = 0 Thanks!

• Replies: 24
• Views: 28,250
09-10-2015, 01:27 AM
31. ### Least Squares

• Replies: 8
• Views: 1,192
09-09-2015, 07:21 PM
32. ### control for confounding variables using logistic regression

Hello... I'm in a project to investigate the prevalence of intrusive thoughts in patients diagnosed with major depressive disorder and non-clinical...

• Replies: 6
• Views: 700
09-08-2015, 04:39 PM
33. ### Help with multiple dummy variable regression.

I am attempting to forecast claim denials, whether it will ultimately be adjusted off or not. I am running all the data through excel. The...

• Replies: 0
• Views: 397
09-08-2015, 01:51 PM
34. ### Is this a case for Mixed Model Anova?

HI, My study has 2 IV's each with two levels (2 hull designs and 2 techniques) = 4 conditions, and has 3 subjects. Max acceleration data was...

• Replies: 0
• Views: 480
09-06-2015, 01:12 PM
35. ### Logistic regression- choosing sample

Hi, I am writing my dissertation and will use a binary outcome variable (decision of a country to sanction other states or not). I was planning to...

• Replies: 0
• Views: 389
09-06-2015, 11:41 AM
36. ### Linear regression: Prais-winsten method in SPSS with confidence intervals

Hello Any help greatly appreciated.... I've conducted a linear regression but as the data is autocorrelated (Durbin Watson = 0.5) I wanted to...

• Replies: 0
• Views: 693
09-06-2015, 08:07 AM
37. ### How do I compare the strength of relationships across three groups (in SPSS)?

Hi everyone, I have data from three countries (US, Spain, and Germany), and ran a separate mediation analysis for each one using four variables:...

• Replies: 0
• Views: 544
09-03-2015, 02:59 PM
38. ### 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: 616
09-03-2015, 11:19 AM
39. ### Error from calculation of X from Y response in linear regression

Hello, I have what I am pretty sure is a simple problem that I can't get a hold on and could use some help! I am sampling air and using a gas...

• Replies: 1
• Views: 459
09-03-2015, 10:19 AM
40. ### Correlation for a sample with constant dependent variable

Hello everyone, I hope I got the right subforum! I would really appreciate if someone takes the time to help me and guide me into th right...

• Replies: 0
• Views: 420
09-03-2015, 10:11 AM
41. ### Key driver analysis on customer satisfaction (CSAT)

I have following data from a survey: 1) Customer satisfaction scores (scale 0-10) 2) Indication of which 3 service aspects respondents give...

• Replies: 0
• Views: 847
09-03-2015, 03:33 AM
42. ### help required urgent

A sample of 12 homes sold last month in Minot is selected. Can we conclude that as the size of the home (in square footage) increases, the selling...

• Replies: 9
• Views: 1,115
09-02-2015, 09:15 AM
43. ### Regression - What to do with insignificant variables?

Please pardon me if you find this question very silly but this doubt has been troubling me for some time now whenever I want to run a regression. ...

• Replies: 2
• Views: 960
09-02-2015, 03:30 AM
44. ### Multinomial Logistic Regression - Interaction Effect

Hello there, I would appreciate it very much if someone could help. In my study, participants saw a picture of a man or woman either with or...

• Replies: 2
• Views: 578
09-01-2015, 06:46 PM
45. ### Website Visits and Marketing Spend and their correlation with Sales

Hello, My company wants to find a correlation between website visits and marketing spend between sales. Essentially, are website visits or spend a...

• Replies: 0
• Views: 596
08-28-2015, 08:11 PM
46. ### Help with multiple regression and spark/spss

Hello, I am trying to create a program in spark that will run a multiple regression for my master's dissertation. I am using the standard formula...

• Replies: 0
• Views: 431
08-28-2015, 04:24 AM
47. ### Regression w/ dummy variables

I'm looking to conduct regression analysis using three dummy variables for independent variables: (1) ethnicity, (2) GLOBE category (i.e. country of...

• Replies: 0
• Views: 450
08-27-2015, 10:26 PM
48. ### Regression analysis for the influence one result has on the results of another test

Hi There, My name is Jordan and I’m a physiotherapist working in London. I have taken over study from a colleague and have been given the data...

• Replies: 0
• Views: 379
08-27-2015, 09:15 AM
49. ### Mediation Analysis With Longitudinal/Multilevel Data

Hi All, I'm trying to determine if it's possible to conduct mediation analysis on three-level data. I have data with repeated measures at five...

• Replies: 0
• Views: 487
08-26-2015, 10:05 PM
50. ### Setting an experiment with ordered categories as predictors

I am trying to apply a multi-factorial regression analyses on a model with 4 different predictors each of which can have four different weights as...

• Replies: 1
• Views: 522
08-26-2015, 04:52 PM
51. ### Is GLM to best for my data

Hello I want to look at abundance of fleas on their hosts, so there are zero counts. I have looked and found that GLM with family = poisson and...

• Replies: 2
• Views: 531
08-26-2015, 02:48 PM
52. ### 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: 5,076
08-26-2015, 09:56 AM
53. ### Alternative for a multi-level analysis

Hi all, For my criminology thesis I am analysing police interviews and would like to research the effect (the presence of) an attorney has on...

• Replies: 1
• Views: 553
08-25-2015, 11:13 AM
54. ### Interpreting my regression results

Hi all, i'm running a panel regression using stata. i wanted to test whether there are indeed region fixed effects (FE) that reside in my data...

• Replies: 0
• Views: 508
08-23-2015, 05:05 PM
55. ### Multiple Regression: 3 levels in IV of interest, how to compare between all 3?

Hi all, I would like to test the following and am hoping to get some assistance as I am new to regression: DV - Brain volume IV - Participant...

• Replies: 0
• Views: 444
08-23-2015, 12:52 AM
56. ### Hierarchical regression for a complex model

So I am testing my own model but it is more complex than I have dealt with before. I know I need hierarchical regression, and I'm using SPSS (I have...

• Replies: 0
• Views: 438
08-21-2015, 04:45 PM
57. ### Regression to the mean for discrete non normal data

Hello At work an initiative was started that attempted to reduce the number of Emergency department attendances by frequent users. I have a set...

• Replies: 1
• Views: 516
08-21-2015, 03:09 PM

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