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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Lightbulb 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...

    Started by Lukan27‎, 09-11-2015 12:38 PM
    • Replies: 4
    • Views: 705
    09-12-2015, 12:23 PM Go to last post
  2. 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...

    Started by wep‎, 09-10-2015 06:21 AM
    • Replies: 11
    • Views: 790
    09-10-2015, 11:52 AM Go to last post
  3. 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!

    Started by hehe1223‎, 06-27-2010 08:30 PM
    2 Pages
    1 2
    • Replies: 24
    • Views: 27,083
    09-10-2015, 01:27 AM Go to last post
  4. Least Squares

    Delete. Unhelpful responses.

    Started by Dave Brunner‎, 09-08-2015 09:20 PM
    • Replies: 8
    • Views: 1,131
    09-09-2015, 07:21 PM Go to last post
  5. 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...

    Started by vahid1990‎, 09-06-2015 09:34 AM
    • Replies: 6
    • Views: 659
    09-08-2015, 04:39 PM Go to last post
  6. 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...

    Started by mdo8105‎, 09-08-2015 01:51 PM
    dummy variable, forecast, multiple regression
    • Replies: 0
    • Views: 361
    09-08-2015, 01:51 PM Go to last post
  7. Unhappy 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...

    Started by Wetninja‎, 09-06-2015 01:12 PM
    mixed anova, multiple datasets
    • Replies: 0
    • Views: 444
    09-06-2015, 01:12 PM Go to last post
  8. 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...

    Started by laurafv‎, 09-06-2015 11:41 AM
    • Replies: 0
    • Views: 359
    09-06-2015, 11:41 AM Go to last post
  9. Post 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...

    Started by alexisg‎, 09-06-2015 08:07 AM
    prais-winsten, regression, spss 22
    • Replies: 0
    • Views: 627
    09-06-2015, 08:07 AM Go to last post
  10. 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:...

    Started by socks_on‎, 09-03-2015 02:59 PM
    spss
    • Replies: 0
    • Views: 507
    09-03-2015, 02:59 PM Go to last post
  11. 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...

    Started by smith.shrestha‎, 09-03-2015 07:53 AM
    multicollinearity, multiple regression
    • Replies: 4
    • Views: 583
    09-03-2015, 11:19 AM Go to last post
  12. 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...

    Started by pom134‎, 09-03-2015 09:28 AM
    • Replies: 1
    • Views: 431
    09-03-2015, 10:19 AM Go to last post
  13. 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...

    Started by Subra‎, 09-03-2015 10:11 AM
    • Replies: 0
    • Views: 356
    09-03-2015, 10:11 AM Go to last post
  14. 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...

    Started by Gert Van Dessel‎, 09-03-2015 03:33 AM
    customer satisfaction, key driver analysis, root cause analysis
    • Replies: 0
    • Views: 709
    09-03-2015, 03:33 AM Go to last post
  15. 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...

    Started by saima1‎, 09-01-2015 02:22 AM
    regression homework
    • Replies: 9
    • Views: 1,071
    09-02-2015, 09:15 AM Go to last post
  16. 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. ...

    Started by abhi1495‎, 09-01-2015 04:27 PM
    insignificant, regression analysis, variables
    • Replies: 2
    • Views: 879
    09-02-2015, 03:30 AM Go to last post
  17. 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...

    Started by lost_in_statistics‎, 09-01-2015 01:32 PM
    interaction effect, multinomial logistic
    • Replies: 2
    • Views: 558
    09-01-2015, 06:46 PM Go to last post
  18. 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...

    Started by Leandro‎, 08-28-2015 08:11 PM
    • Replies: 0
    • Views: 555
    08-28-2015, 08:11 PM Go to last post
  19. 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...

    Started by spinecho‎, 08-28-2015 04:24 AM
    • Replies: 0
    • Views: 395
    08-28-2015, 04:24 AM Go to last post
  20. 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...

    Started by tedmitt‎, 08-27-2015 10:26 PM
    • Replies: 0
    • Views: 414
    08-27-2015, 10:26 PM Go to last post
  21. How to regress data

    Hi, I would like to do a simple regression one variable on a dependent variable. Specifically, I would like to regress a financial ratio such as ROE...

    Started by StatisticsNewbie12‎, 08-27-2015 01:59 PM
    • Replies: 0
    • Views: 623
    08-27-2015, 01:59 PM Go to last post
  22. Regression analysis for the influence one result has on the results of another test

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

    Started by jordanwb‎, 08-27-2015 09:15 AM
    • Replies: 0
    • Views: 351
    08-27-2015, 09:15 AM Go to last post
  23. 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...

    Started by Colonel‎, 08-26-2015 10:05 PM
    • Replies: 0
    • Views: 396
    08-26-2015, 10:05 PM Go to last post
  24. 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...

    Started by Ines77‎, 08-26-2015 04:16 PM
    categorical predictors, categorical variables, regression analysis
    • Replies: 1
    • Views: 499
    08-26-2015, 04:52 PM Go to last post
  25. 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...

    Started by Pippy34‎, 08-26-2015 02:01 AM
    • Replies: 2
    • Views: 491
    08-26-2015, 02:48 PM Go to last post
  26. 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...

    Started by thega‎, 04-04-2011 07:59 AM
    • Replies: 2
    • Views: 4,993
    08-26-2015, 09:56 AM Go to last post
  27. 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...

    Started by Aeleanor‎, 08-25-2015 09:15 AM
    analysis, logistic, multi-level, nested, regression
    • Replies: 1
    • Views: 505
    08-25-2015, 11:13 AM Go to last post
  28. 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...

    Started by proby2‎, 08-23-2015 05:05 PM
    • Replies: 0
    • Views: 484
    08-23-2015, 05:05 PM Go to last post
  29. Exclamation 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...

    Started by michikoc‎, 08-23-2015 12:52 AM
    ancova, multiple regression, regression
    • Replies: 0
    • Views: 409
    08-23-2015, 12:52 AM Go to last post
  30. Fixed effect Model

    dear all, I am having problems with the fixed effect model. In a nutshell, I am analysing the impact of disasters within families with regard...

    Started by Heike C.‎, 08-22-2015 09:08 AM
    • Replies: 0
    • Views: 407
    08-22-2015, 09:08 AM Go to last post
  31. 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...

    Started by cp349‎, 08-21-2015 04:45 PM
    hierarchical, mediators, model, moderators, regression
    • Replies: 0
    • Views: 395
    08-21-2015, 04:45 PM Go to last post
  32. 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...

    Started by MrScotchpie‎, 08-21-2015 08:59 AM
    • Replies: 1
    • Views: 472
    08-21-2015, 03:09 PM Go to last post
  33. Logistic Regression

    Hello, I'm currently working on a churn modelling exercise that uses logistic regression. The challenge that i'm facing now is that the model is...

    Started by JustinG‎, 08-20-2015 04:34 AM
    churn, logistic regression, predictive analysis, sample
    • Replies: 2
    • Views: 622
    08-21-2015, 05:11 AM Go to last post
  34. Variation of Gauss - Markov theorem

    Hi all, I was wondering what happens to the proof and the results of the Gauss - Markov theorem, if one hypothesis is changed and so if the...

    Started by StatsFX‎, 08-19-2015 11:13 AM
    • Replies: 0
    • Views: 377
    08-19-2015, 11:13 AM Go to last post
  35. Logistic Regression

    Hello I am going to start building a Logistic Regression model based on medical data for the purpose of classification. My problem started with...

    Started by osamastat‎, 08-15-2015 06:44 AM
    • Replies: 4
    • Views: 816
    08-16-2015, 02:37 PM Go to last post
  36. Confounder

    What if I see a 10% change (decrease) in an variable effect (X1 on Y) when including another variable (X2), though the effect of X1 is never remotely...

    Started by hlsmith‎, 08-13-2015 05:12 PM
    • Replies: 3
    • Views: 632
    08-16-2015, 12:16 PM Go to last post
  37. Can I draw an interaction plot using Generalised Estimating Equations (GEE)?

    Hello, Can I draw an interaction plot using Generalised Estimating Equations (GEE)? If yes, how? Thanks.

    Started by Paulius‎, 08-16-2015 10:42 AM
    regresion analysis, statistics
    • Replies: 0
    • Views: 370
    08-16-2015, 10:42 AM Go to last post
  38. Difference-in-difference regression

    Hello, I have a problem with my current research project and I am not very experienced with statistics so it would be great to find some help...

    Started by ERa‎, 08-16-2015 02:46 AM
    difference in difference, difference-in-difference, ols, ols regression, regression
    • Replies: 0
    • Views: 504
    08-16-2015, 02:46 AM Go to last post
  39. Best way to code a variable in a hierarchical (multi-level) regression?

    The outcome is binary, and I have individual-level data and geographical-level data. It's the latter I need help with. Here's the best example:...

    Started by oncearunner‎, 08-13-2015 09:38 PM
    • Replies: 1
    • Views: 405
    08-13-2015, 10:54 PM Go to last post
  40. Logistic Regression: collinearity btw continuous and categorical predictors?

    Hi All, I am still working on fitting a binary Logistic Regression model in which the DV is land 'optimal vs. non-optimal quality', and the IVs are...

    Started by gianmarco‎, 08-12-2015 06:22 AM
    • Replies: 7
    • Views: 931
    08-12-2015, 08:21 AM Go to last post
  41. Which model would you choose?

    Dear readers, I am struggeling with the model selection (ICs are very different and many insignificant models). Which model would you choose, and...

    Started by martijn9000‎, 08-12-2015 07:17 AM
    aic bic, model selection
    • Replies: 1
    • Views: 407
    08-12-2015, 07:35 AM Go to last post
  42. How to handle missing values in lm.fit?

    Is there a way to use lm.fit without completely removing rows with missing data using R? Is there a way for lm.fit to leave out one piece of...

    Started by RM1004‎, 08-10-2015 11:36 AM
    missing data, regression model
    • Replies: 1
    • Views: 394
    08-10-2015, 04:33 PM Go to last post
  43. Help with regression model

    Hi, I am trying to understand whether there are any problems with a regression model I'm using for research. I'm interested in the effect of...

    Started by oracle133‎, 08-10-2015 11:11 AM
    • Replies: 0
    • Views: 335
    08-10-2015, 11:11 AM Go to last post
  44. Polynomial Regression

    Is there anyway to get this formula in the polar opposite where X = Expression? I am hoping to get this so that I can use it to help do a...

    Started by mrmmickle1‎, 08-06-2015 11:42 PM
    • Replies: 0
    • Views: 515
    08-06-2015, 11:42 PM Go to last post
  45. Best Way to Format an Excel Data Sheet for export to R.

    Hi. I am conducting a multiple linear regression using Panel data for my finance honours research project. I have collected data for 100 stocks...

    Started by DCKALE002‎, 08-06-2015 09:10 AM
    • Replies: 0
    • Views: 465
    08-06-2015, 09:10 AM Go to last post
  46. Comparing linear regression models: a chi-squared test to compare adjusted R-squares?

    Hi all, I used linear regression to analyze the data of one of my experiments, and used 3 predictors in a first model, added 4 more predictors in...

    Started by Maayke‎, 08-05-2015 07:43 AM
    • Replies: 1
    • Views: 512
    08-06-2015, 04:04 AM Go to last post
  47. Experiment Design Help please

    Hi All I have used a Central Composite Design (CCD) for my experiments, where I have three Factors (A, B, c) and each Factor has five values. I have...

    Started by Dlair‎, 06-21-2015 09:16 AM
    • Replies: 2
    • Views: 720
    08-04-2015, 06:15 PM Go to last post
  48. p-value of a coefficient from a regression

    The t-stat value follows a two-tail symmetric t-distribution with mean and median of zero? Am I correct so far? If so, then how can you get a...

    Started by oahz‎, 08-04-2015 11:03 AM
    • Replies: 9
    • Views: 786
    08-04-2015, 05:54 PM Go to last post
  49. Probit Regression

    Hİ all. Hope everyone is great. I just want to ask a question. What are the assumptions of probit regression? Can you offer me a book about probit...

    Started by chivasrom‎, 08-04-2015 03:33 AM
    • Replies: 1
    • Views: 402
    08-04-2015, 04:39 AM Go to last post
  50. Impact of heteroscedasticity and non-normality on utility of regression result?

    Hello: I am using least squares 2nd order polynomial regression to determine the effect of a single independent variable (X) on a dependent...

    Started by Joost‎, 08-01-2015 08:45 PM
    • Replies: 0
    • Views: 417
    08-01-2015, 08:45 PM Go to last post
  51. What if you are not interested in a variable that has been found to matter in the lit

    The article I am working for stresses the importance of a variable that my organization has no interest in at all. It is an important control, should...

    Started by noetsi‎, 07-31-2015 02:03 PM
    • Replies: 4
    • Views: 666
    08-01-2015, 04:28 AM Go to last post
  52. SPSS Logistic Regression Predicts Too Many Negatives?

    Hello everybody, I have a logistic regression model, where the outcome Yes is coded as 1, No as 0. The split between Yes and No is about 30/70...

    Started by pd1598‎, 07-31-2015 11:41 AM
    • Replies: 6
    • Views: 610
    08-01-2015, 03:28 AM Go to last post
  53. New to hierarchical regression, looking for advice

    Hey all, I am relatively experienced in plain old OLS and I'm trying to learn how to do mixed-effects, hierarchical modeling. I got Andrew...

    Started by sasin‎, 07-31-2015 07:57 PM
    • Replies: 0
    • Views: 393
    07-31-2015, 07:57 PM Go to last post
  54. What is "mixed-effects OLS regression"

    It is mentioned on p 14 of the link below. I have never heard of it before... ...

    Started by noetsi‎, 07-31-2015 01:58 PM
    • Replies: 3
    • Views: 470
    07-31-2015, 07:21 PM Go to last post
  55. Fixed Effects Regression - Dependent Variable Issue

    Hi all, I am currently running a fixed effects model in Stata, and have a question regarding how to specify my dependent variable. So I have...

    Started by Magnus MMJ‎, 07-27-2015 06:12 PM
    • Replies: 8
    • Views: 834
    07-31-2015, 10:22 AM Go to last post
  56. Linear Reg (Press Statistic)

    I was not familiar with the Press Statistic. I am currently looking it up. Seems to be a leave-one-out procedure. Can any one provide some...

    Started by hlsmith‎, 07-30-2015 08:43 AM
    • Replies: 2
    • Views: 451
    07-30-2015, 09:06 AM Go to last post
  57. Relationship between 2 variables & 1 dependant

    Hi all, My wife is busy with an assignment that is even giving me grey hair. She needs to determine the relationships between 2 variables and 1...

    Started by kiepie‎, 07-28-2015 01:40 PM
    • Replies: 7
    • Views: 620
    07-30-2015, 08:45 AM Go to last post
  58. Can someone please please please help me on these homework questions?

    Hello everyone! Im a stats student that is having some difficulty on my homework. I have attached the questions (7) in a picture below. If you could...

    Started by statsstudent1‎, 07-30-2015 03:01 AM
    • Replies: 1
    • Views: 357
    07-30-2015, 06:25 AM Go to last post
  59. Moderating effects in structural equation models

    Hello, first, I want to apologize if I'm opening this thread in the wrong folder etc. I just registered here and I'm a bit confused still. I'm...

    Started by PSH‎, 07-30-2015 04:37 AM
    moderation, moderator, regression, sem
    • Replies: 0
    • Views: 380
    07-30-2015, 04:37 AM Go to last post
  60. Linear Regression with effect size changes of categorical variables with continuous

    I have three categorical variables (disked, herbicide, Lands) each is binomial (0,1). For example, within disked there is a group in which it does...

    Started by farre1pd‎, 07-27-2015 01:45 PM
    ancova, categorical, continuous, group differences
    • Replies: 3
    • Views: 471
    07-27-2015, 03:21 PM Go to last post

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