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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Change score as the DV with change scores as IVs - Category mistake?

    I have a theory that needs to be tested. The idea is that an IV "change in the knowledge of", and an IV "change in the sense of importance" of...

    Started by urban_planner‎, 07-26-2014 01:35 AM
    • Replies: 0
    • Views: 1,299
    07-26-2014, 01:35 AM Go to last post
  2. change sign estimate manually because of underlying theory

    *****the thread should be: change sign observations variablebecause of underlying theory****** (sorry for the mistakes in the previous version of...

    Started by lukeskywalker84‎, 02-27-2013 04:31 PM
    change, estimate, ols, sign, theory
    • Replies: 0
    • Views: 1,639
    02-27-2013, 04:31 PM Go to last post
  3. Changes in the level of Significance

    I use standard errors for significance. Basically there is no problem with the significance, the problem is how to interprete the results. The...

    Started by dou‎, 09-01-2011 03:42 AM
    • Replies: 2
    • Views: 2,534
    09-02-2011, 04:45 AM Go to last post
  4. Changing significance level when interactions are added

    Hi, I'm wondering why my significance levels go from significant, to insignificant, and back to significant again when adding interactions? ...

    Started by andreek‎, 04-26-2014 08:17 AM
    • Replies: 1
    • Views: 2,221
    04-26-2014, 11:37 AM Go to last post
  5. Characteristics that define simple linear regression?

    Can someone please tell me which three characteristics define simple linear regression? Thank you in advance.

    Started by cfvera‎, 05-01-2014 05:39 PM
    • Replies: 4
    • Views: 2,301
    05-05-2014, 10:44 AM Go to last post
  6. Post Check and develop my answers, multiple regression

    This is the question, i was wondering if anyone could check if i did the correct thing, and help me develop my written answers if needed. a)...

    Started by Mosphaitus‎, 08-17-2008 08:22 AM
    • Replies: 4
    • Views: 6,914
    08-17-2008, 12:49 PM Go to last post
  7. Checking assumptions for interaction terms? too confusing.. please help.

    I am checking assumptions and outliers before running moderated regression analysis. I wonder if I should check normality, linearity, and equal...

    Started by Ilikespring‎, 10-18-2013 11:40 PM
    • Replies: 3
    • Views: 3,505
    10-19-2013, 05:21 PM Go to last post
  8. Checking assumptions regression categorical predictors

    Hi, I am doing a regression analysis on review star rating of VR headsets as a dependent variable and 14 attribute dummies. Each dummy is an...

    Started by diederikvanduuren‎, 07-10-2017 12:24 PM
    • Replies: 2
    • Views: 729
    07-10-2017, 06:56 PM Go to last post
  9. Checking homoscedasticity in repeated measures

    Hello, When checking the assumption of constant variance for repeated measures data, am I correct in thinking that the variance of residuals...

    Started by deeuu‎, 02-18-2015 11:36 AM
    homoscedasticity, regression assumption
    • Replies: 0
    • Views: 1,468
    02-18-2015, 11:36 AM Go to last post
  10. Checking MI data residuals

    Hello, I was wondering, what is the best ways to check the residuals of a multiple linear regression on multiply imputed data? Is it a case...

    Started by Ri89‎, 08-02-2011 10:02 AM
    • Replies: 0
    • Views: 1,618
    08-02-2011, 10:02 AM Go to last post
  11. Checking temporal dependency

    Hi guys, this is my problem: I have performed some experimental tests (tomographies) on 40 samples. These samples are made by four different...

    Started by dado92‎, 01-11-2017 12:10 PM
    temporal dependency
    • Replies: 2
    • Views: 2,724
    01-11-2017, 01:12 PM Go to last post
  12. chemical analysis

    Hi guys help me? I have a problem. I have to analyze a product just finished the processing (hot) and subsequently when it is cooled to room...

    Started by crimelist‎, 03-10-2016 02:44 AM
    • Replies: 13
    • Views: 2,018
    03-10-2016, 11:56 AM Go to last post
  13. Chi Square and Regression

    Hi all, First time post so please go easy on me :p I have a bunch of categorical variables that I am thinking of using as predictor variables...

    Started by Bathy1‎, 03-29-2016 03:09 PM
    • Replies: 3
    • Views: 1,805
    03-30-2016, 12:18 PM Go to last post
  14. Chi square and Wald chi square

    What is the difference between wald chi square test and chi square test in regression analysis?

    Started by najmehjami‎, 06-20-2011 10:49 AM
    • Replies: 2
    • Views: 20,935
    06-20-2011, 01:26 PM Go to last post
  15. Chi square as sneak peek into logistic regression

    Let's say I have these variables... Dependent var: cancelled_flag Independent vars: region, gender, etc My ultimate goal is to do a logistic...

    Started by jawon‎, 12-03-2009 07:12 PM
    • Replies: 1
    • Views: 4,446
    12-05-2009, 08:23 PM Go to last post
  16. Chi vs R for goodness of fit

    As an undergraduate, I had a physics professor who strongly preferred chi^2 as a measure of a good curve-fit as opposed to correlation coefficient r....

    Started by MALDATA‎, 02-12-2008 01:00 PM
    • Replies: 1
    • Views: 2,727
    02-16-2008, 05:10 PM Go to last post
  17. Chi-quare and logistic regression with three level independent variable

    Dear Friends, I am currently working on my master's Dissertation and have some problems in finding out how I should do my chi-square-test and...

    Started by Ricarda_Rau‎, 06-26-2015 07:24 AM
    chi suqrare, control condition, online experiment
    • Replies: 2
    • Views: 1,383
    06-26-2015, 08:56 AM Go to last post
  18. Chi-Square Analysis Question

    Greetings, I was wondering if somebody would like to illuminate an issue, in laymen's terms, for me. I'm not engaged in statistics at present,...

    Started by statmaster‎, 04-23-2013 05:56 PM
    • Replies: 2
    • Views: 1,681
    04-23-2013, 11:01 PM Go to last post
  19. Chi-square instead of Multiple Regression Analysis

    Can someone help me? How can I explain that I used Chi-square test of association instead of Multiple Linear Regression Analysis because I had...

    Started by choco21lit‎, 05-21-2016 11:42 AM
    • Replies: 0
    • Views: 1,134
    05-21-2016, 11:42 AM Go to last post
  20. Choice of final model

    There are many strategies for selecting a final model (and which variables are in the final model will likely influence the SE and the coefficients)....

    Started by noetsi‎, 09-09-2014 10:12 AM
    • Replies: 11
    • Views: 2,602
    09-10-2014, 11:55 AM Go to last post
  21. choosing β0 and β1 to minimize the residual sum of squares

    I'm reading a book called , and I have a question in regards to the material inside. I understand that we can find the residual sum of squares by...

    Started by Frenchie‎, 07-26-2014 11:53 PM
    • Replies: 0
    • Views: 2,939
    07-26-2014, 11:53 PM Go to last post
  22. Choosing a model

    Hi all, Probably a silly question, but I'm confused about what form of multiple regression to perform (stepwise, hierarchical, etc). If I perform...

    Started by kk89‎, 09-04-2012 03:38 AM
    • Replies: 1
    • Views: 1,243
    09-04-2012, 01:32 PM Go to last post
  23. Choosing a statistical analysis - is a GAM appropriate for this data?

    Hello, I am a master’s student and working on writing my prospectus. As such, my advisor is rather picky and I am trying to make sure I have at...

    Started by Fractallis‎, 09-12-2012 02:32 PM
    • Replies: 0
    • Views: 2,189
    09-12-2012, 02:32 PM Go to last post
  24. Choosing appropriate statistics (please)

    Hi, I have an issue (mostly being clueless and trying to achieve more than I can), I am writing a page in Ruby on Rails for which I need to calculate...

    Started by HaideeHammond‎, 07-25-2016 03:14 PM
    correlation, pearson, phi coefficient, probablity, ruby
    • Replies: 0
    • Views: 1,131
    07-25-2016, 03:14 PM Go to last post
  25. Choosing between Binominal, Negative binominal and Poisson regression

    Hey guys, can some one explain to me in which situation it is best to use one of these three regressions? And what tests would I need to do in SPSS...

    Started by IvLi‎, 06-01-2013 02:53 PM
    • Replies: 1
    • Views: 1,338
    06-01-2013, 07:31 PM Go to last post
  26. 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....

    Started by TreeMan13‎, 12-18-2011 10:08 PM
    • Replies: 2
    • Views: 8,840
    12-18-2011, 11:09 PM Go to last post
  27. Choosing test for longitudinal, repeated measures and clustered data

    Hi everyone! I'm a researcher within cardiovascular medicine, currently working on a study in endocrinology (diabetes). I have the following...

    Started by Adam1‎, 11-27-2013 05:10 PM
    longitudinal data, repeated measures
    • Replies: 0
    • Views: 1,334
    11-27-2013, 05:10 PM Go to last post
  28. Choosing the best dependent variable (Y)

    Hello, I'm working on a multiple regression model. The dependent variable (Y) is an ordered multinomial qualitative variable. To do regression...

    Started by goldenboy‎, 11-23-2012 05:16 AM
    best dependent variable
    • Replies: 5
    • Views: 3,118
    12-03-2012, 05:03 AM Go to last post
  29. Choosing the Best Regression Model

    I have been asked to build a predictive model of a population based on cost. The sample size of the population is 30k for the current test (with data...

    Started by JAH‎, 04-22-2011 03:48 PM
    • Replies: 0
    • Views: 3,675
    04-22-2011, 03:48 PM Go to last post
  30. choosing the right model

    Hello, Does it makes sense to test H_knot : Beta1 = 0 after having rejected H_knot : Beta2 = 0. So in other words, if it appears that a 2nd...

    Started by floriandotti‎, 11-23-2010 12:06 AM
    • Replies: 4
    • Views: 2,781
    11-23-2010, 12:03 PM Go to last post
  31. CI for Dependent Variable in Multiple Linear Regression

    I have a regression model but I want to get a 95% confidence interval of the dependent variable for given values of the independent variables. I...

    Started by Jegpeg‎, 02-25-2016 08:21 PM
    confidence interval, regression
    • Replies: 1
    • Views: 871
    06-17-2016, 11:58 AM Go to last post
  32. Clarifying collinearity

    I am trying to run a regression model where the Y is concentration and predictors are stove type (e.g., stove1, stove 2, stove 3) and fuel type...

    Started by statshelp1234‎, 07-30-2014 05:21 PM
    collinearity, interpret, regression analysis
    • Replies: 3
    • Views: 1,214
    07-31-2014, 09:46 AM Go to last post
  33. Question Classification Rate of Multivariate Logistic Regression

    Hello, I'm running a binary (2 groups), multivariate (multiple predictors) logistic regression analysis, and would like to test the classification...

    Started by eyeballjunk‎, 09-28-2009 09:10 AM
    • Replies: 1
    • Views: 5,071
    09-29-2009, 03:01 PM Go to last post
  34. Classification with high positive predictive value

    I have a two-class classification problem. I would like to train a multivariate classifier with 100% positive predictive value. In other words, I...

    Started by dchalmer‎, 09-17-2013 09:52 AM
    classification, predictive model, predictive value
    • Replies: 3
    • Views: 1,941
    09-30-2013, 11:51 AM Go to last post
  35. CLS vs OLS

    What is the difference between classical least squares regression (CLSR) and linear least squares regression (also known as ordinary least squares...

    Started by hazelnut‎, 01-13-2011 08:16 PM
    • Replies: 0
    • Views: 3,890
    01-13-2011, 08:16 PM Go to last post
  36. Cluster Analysis

    Hi all, I have a small sample of 75 participants. I'm conducting an exploratory study looking at psychological distress and gender role...

    Started by cmuhooligan‎, 11-29-2007 11:26 AM
    • Replies: 0
    • Views: 2,847
    11-29-2007, 11:26 AM Go to last post
  37. Cluster-robust standard errors needed in random effects model?

    Hello, I'm currently working with a company dataset in the form of an unbalanced panel (overall sample size: 1.300 company years, T: 10, X: ~170...

    Started by Cemon‎, 04-23-2013 04:43 AM
    • Replies: 0
    • Views: 3,978
    04-23-2013, 04:43 AM Go to last post
  38. Clustered Robust SEs or Multilevel Modeling approach? HELP NEEDED :-)

    Hello everyone, I would love to hear your quick reaction to a particular data structure my colleagues and I are working with because we keep...

    Started by ema2146‎, 03-31-2014 09:45 AM
    • Replies: 7
    • Views: 1,803
    04-01-2014, 10:13 AM Go to last post
  39. Clustering

    i) T/F:Principal Components Analysis can be used to create a low dimensional projection of the data for use with clustering. For this one above, I...

    Started by maryjkluther23‎, 05-24-2017 03:25 AM
    • Replies: 0
    • Views: 898
    05-24-2017, 03:25 AM Go to last post
  40. clustering similar lines (on chart)

    Firstly sorry if this is the wrong forum for this question. I have a matrix made up of distances in meters and for every distance I have an R2...

    Started by teshub‎, 05-20-2013 11:28 AM
    clustering, correlations, relationships
    • Replies: 0
    • Views: 1,132
    05-20-2013, 11:28 AM Go to last post
  41. Clusters in regression

    Hi, I'm using SAS for regression analysis. I have a series of observations of temperatures. I've two tempratures - one in country X and one in...

    Started by ofir‎, 09-07-2013 08:32 AM
    • Replies: 4
    • Views: 2,753
    09-08-2013, 11:23 AM Go to last post
  42. Co-efficient interpretation in Gamma Regression Model

    Hi Guys, I am trying to fit a gamma regression model using a log link model. Now, I get a negative co-efficient for one of my IVs. What is the...

    Started by Ancalagon The Black‎, 07-06-2011 01:49 PM
    gamma regression, glm, regression
    • Replies: 0
    • Views: 3,501
    07-06-2011, 01:49 PM Go to last post
  43. Cochrane Orcutt Eviews 9

    Cochrane Orcutt estimation is a procedure in econometrics, which adjusts a linear model for serial correlation in the error term. It is named after...

    Started by OlhDt_semarang‎, 04-24-2016 09:57 PM
    • Replies: 0
    • Views: 2,620
    04-24-2016, 09:57 PM Go to last post
  44. coding - one categorical vs multiple dummy

    Hi, Most things I read seem to suggest that when you have a categorical predictor in a regression analysis you should create k-1 dummy variables,...

    Started by pgseye‎, 05-09-2016 06:40 PM
    • Replies: 2
    • Views: 1,223
    05-10-2016, 03:57 PM Go to last post
  45. coding for dummy variable

    Hello all, I am wondering why dummy variables should always be coded either 0 or 1. For example, does it make any mathematical difference in...

    Started by luic‎, 03-17-2011 02:05 AM
    • Replies: 2
    • Views: 5,707
    03-17-2011, 07:26 AM Go to last post
  46. coefficient changes direction with interaction term entered

    Hi I'm running a logistic regression and my first model tests the direct effects of a variable (X) which is initially negative. In the second model...

    Started by dce219‎, 06-11-2011 10:05 AM
    • Replies: 2
    • Views: 7,299
    06-13-2011, 08:47 PM Go to last post
  47. coefficient discrepancies

    I am running a regression with 1 cont. ind. var and 1 cat. ind. var. There are 3 levels to the cat var so I have the lowest level set as the dummy...

    Started by shanehall.m‎, 11-08-2011 10:38 AM
    • Replies: 2
    • Views: 1,791
    11-08-2011, 04:00 PM Go to last post
  48. Coefficient of correlation and forcing to pass origin

    Hello! I donít understand much about statistics, so forgive me if this is a very basic question :o Iím working with linear regression, forcing...

    Started by MopsaAspom‎, 05-18-2012 10:00 AM
    • Replies: 4
    • Views: 3,887
    05-18-2012, 11:26 AM Go to last post
  49. Question Coefficient of Determination

    Hi there, I'm using non-linear regression (specially I'm using neural networks for time series prediction) and I'm a bit unsure about the...

    Started by Pooven‎, 06-28-2011 05:05 PM
    r squared
    • Replies: 2
    • Views: 4,053
    06-29-2011, 06:14 AM Go to last post
  50. Coefficient of determination and statistical significance

    Hi, I tried two different models for a regression (both with one predictor). The first one was a linear regression model of the type Y= a + bX...

    Started by val92‎, 02-15-2011 05:24 PM
    • Replies: 6
    • Views: 15,353
    02-16-2011, 01:49 PM Go to last post
  51. Question Coefficient of determination interpretation

    Hey guys, this my first post in here so hello everyone:) I have a question regarding the coefficient of determination. Wikipedia says: An...

    Started by bgst‎, 09-09-2014 07:51 AM
    • Replies: 4
    • Views: 2,081
    09-17-2014, 04:58 PM Go to last post
  52. Coefficient of variation as dependent variable in linear regression - is it correct ?

    Hi, I try to predict intra-individual variation in judgment task (20 judgment). I've done a multiple linear regression with a coefficient of...

    Started by variabilty‎, 04-20-2013 04:42 AM
    • Replies: 0
    • Views: 1,504
    04-20-2013, 04:42 AM Go to last post
  53. Coefficient sign varys over the distribution of the dependent variable

    Hi, Lets say I am estimating a linear regression with Y as a continuous DV and X as a binary IV. Based on theoretical reasons I am assuming that...

    Started by xs0982‎, 07-21-2017 08:53 AM
    • Replies: 1
    • Views: 382
    07-21-2017, 11:16 AM Go to last post
  54. coefficient standardization

    Hi All, I am working on a 2nd order regression. The span of coefficient is large (say 1:10000). So the coefficients of 2nd order are very big and...

    Started by bettertony‎, 04-10-2014 04:03 PM
    multiple regression, second order polynomial, standardization
    • Replies: 0
    • Views: 994
    04-10-2014, 04:03 PM Go to last post
  55. coefficient variance decomposition test for multicollinearity

    good day, please assist me in interpreting the results of the coefficient variance decomposition test. i am a bit confused; i think the condition...

    Started by Boi‎, 04-03-2016 01:16 PM
    • Replies: 0
    • Views: 2,647
    04-03-2016, 01:16 PM Go to last post
  56. Coefficients in linear regression

    hi i am using spss 17.0 i am using linear regression to predict behaviours for the coefficent output does the constant and the indperpentant...

    Started by aarong‎, 07-21-2011 09:15 AM
    • Replies: 6
    • Views: 3,479
    07-21-2011, 03:32 PM Go to last post
  57. Exclamation Coefficients and standard deviations

    Hi, I have seen in a paper that the author states that the coefficient he gets in a regression implies that an increase of one standard deviation...

    Started by bobesp‎, 07-02-2008 03:52 PM
    • Replies: 2
    • Views: 10,935
    07-05-2008, 04:58 PM Go to last post
  58. Coefficients of a Dynamic Panel Data Model for Economic Growth

    Dear all, I am having difficulties with the interpretation of the regression results from estimating a growth regression in a dynamic panel data...

    Started by mvanbenthem‎, 06-05-2014 03:21 AM
    • Replies: 1
    • Views: 2,322
    06-12-2014, 04:23 AM Go to last post
  59. Coefficients of delta-lognormal modeling

    I am trying to understand delta-lognormal modeling. Please bear with me. I am applying this method to some fishery data. This method combines...

    Started by elopomorph‎, 06-25-2011 06:27 PM
    delta lognormal
    • Replies: 2
    • Views: 3,965
    03-16-2012, 11:38 AM Go to last post
  60. Question cohort regression analysis?

    Is a multiple regression analysis a good test for cohort or even nested cohort? Dependent variable is LDL cholesterol binomial YES?NO? for LDL 240 or...

    Started by Maureen‎, 06-06-2012 11:24 AM
    • Replies: 0
    • Views: 1,467
    06-06-2012, 11:24 AM Go to last post

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