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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. English name for this index - Least Squares Method

    Hi all, I was wondering what is the English name for the index I_2, used to evaluate the goodness of the fit: I_2= SQRT/SUM(Y_i)/N, where ...

    Started by hannibal‎, Yesterday 08:53 AM
    • Replies: 0
    • Views: 61
    Yesterday, 08:53 AM Go to last post
  2. ordinal or multinominal regression?

    This question may sound bit novice but I find it bit tricky There are 8 continuous predictor variable and My dependent variable is: not used...

    Started by frank100‎, Yesterday 02:21 AM
    ordinal
    • Replies: 1
    • Views: 58
    Yesterday, 02:53 AM Go to last post
  3. Warning on ordinal regression

    I have a dependent variable:low,medium,high (coded as 1,2,3) and 10 independent continuous variable and 190 cases. When I run ordinal...

    Started by frank100‎, 11-20-2017 10:33 PM
    • Replies: 2
    • Views: 117
    11-21-2017, 09:48 PM Go to last post
  4. A little clarification on linear regression

    Hi all! I'm new to this forum so bare with me, I recently had a test and got a sub-par score because of a pair of questions but with everything we...

    Started by JSG1111‎, 11-20-2017 03:16 PM
    • Replies: 2
    • Views: 105
    11-20-2017, 10:15 PM Go to last post
  5. logit model without constant: which statistics for evaluating?

    Hi My logistic model has a dependent variable responses (1) if an investmentís cost/benefit ratio≥1 and (0) if c/b ratio<1. Independents are...

    Started by logit‎, 11-17-2017 05:46 AM
    • Replies: 5
    • Views: 257
    11-18-2017, 04:36 AM Go to last post
  6. What should I report for a negative binomial regression in a presentation?

    Would I report the statistics similar to those of a normal regression? The equation, R2 and p-value?

    Started by srpang89‎, 11-17-2017 10:33 AM
    • Replies: 1
    • Views: 122
    11-17-2017, 11:29 AM Go to last post
  7. Survival analysis and competing risks

    Hi there, please feel free to move this thread if I've put it in the wrong forum! Am trying to run some survival analyses for the first time and...

    Started by elvendork‎, 11-14-2017 10:08 PM
    • Replies: 2
    • Views: 148
    11-16-2017, 07:01 PM Go to last post
  8. multiple regression residuals and "partialling out"

    Hi All, I would like to clarify a bit what "partialling out" means in multiple regression. Suppose I have three variables: Y, X, and Z. First,...

    Started by Nickmpco‎, 11-16-2017 01:04 PM
    • Replies: 0
    • Views: 92
    11-16-2017, 01:04 PM Go to last post
  9. Interpreting LOG-LINEAR(ratio) Model

    Hello, I ve a linear regression model. The dependent variable is log transformed ln_EBIT (EBIT is in Million EUR). The independent variable is a...

    Started by rmk‎, 11-10-2017 08:10 AM
    • Replies: 1
    • Views: 146
    11-16-2017, 11:49 AM Go to last post
  10. is multiple regression the right choice for me?

    I am trying to ascertain the relationship between three variables; two independent and one dependent so I'm fairly confident that a multiple...

    Started by PippoMiller‎, 11-15-2017 10:13 AM
    correlation, multi-variable, mutliple regression, repeated measurements
    • Replies: 2
    • Views: 121
    11-16-2017, 05:42 AM Go to last post
  11. Multilevel regression or Conjoint analysis

    Hi. We have made a survey to find out if men have a more positive thinking of protein than woman with a rating of some products which ranges from 1...

    Started by Redspaet‎, 11-15-2017 06:00 PM
    • Replies: 0
    • Views: 81
    11-15-2017, 06:00 PM Go to last post
  12. How to interpret the results from this mixed model?

    I was wondering if someone could help me interpret the results from this generalized linear model. I specified a Poisson distribution (since the...

    Started by srpang89‎, 11-15-2017 12:57 PM
    • Replies: 2
    • Views: 109
    11-15-2017, 04:14 PM Go to last post
  13. How to calculate z-test, p-test and other test values in regression analysis?

    I would like to learn how to calculate P-test, Z-test, T-test and F-test for Simple and Multiple Linear Regression Analysis by hand (without help of...

    Started by Nousher Ahmed‎, 11-10-2017 07:57 AM
    • Replies: 1
    • Views: 159
    11-10-2017, 10:24 AM Go to last post
  14. Correlation outliers

    Aside from visually (the scatterplot) how can outliers be determined?

    Started by TheStatProf‎, 11-05-2017 05:27 PM
    • Replies: 2
    • Views: 239
    11-06-2017, 06:09 PM Go to last post
  15. How to determine which model fits my non-linear data the best?

    I've got SigmaPlot and JMP. What's the best way to go about determining which curve fits my non-linear data the best? What parameters should I be...

    Started by srpang89‎, 11-03-2017 08:41 PM
    • Replies: 3
    • Views: 250
    11-04-2017, 06:49 PM Go to last post
  16. Running complete and reduced model regression in SPSS

    Hello Everyone, My name is Michael and I am currently doing my homework. I have encountered some problems that I donít know how to solve. It is...

    Started by Gunny‎, 11-04-2017 07:55 AM
    • Replies: 0
    • Views: 150
    11-04-2017, 07:55 AM Go to last post
  17. Wink Missingness C. Case Special Case Logistic Regression

    I apologize if this question or question like it has been answered in the past on this forum. The search function doesnít seem to be working on the...

    Started by binaryc0de‎, 11-01-2017 12:40 PM
    • Replies: 1
    • Views: 134
    11-02-2017, 08:39 PM Go to last post
  18. Can I ignore issues of dependence among independent variables?

    A quick rundown of what I am doing- I am documenting the phenomena of how an aggregate statistic is inappropriate when the groups it is...

    Started by the42up‎, 11-01-2017 07:40 AM
    • Replies: 4
    • Views: 208
    11-01-2017, 12:10 PM Go to last post
  19. Logistic Regression

    I'm a first time poster to this message board and a newbie to logistic regression. Background: I conducted a logistic regression using enrolled in...

    Started by scoulter‎, 11-01-2017 10:41 AM
    • Replies: 0
    • Views: 75
    11-01-2017, 10:41 AM Go to last post
  20. Need some guidance - which regression to use

    Hi, So for my research, I have picked up data from INSEAD and Adecco's Global Competitiveness Index. For reference, it ranks countries based on...

    Started by Maggie1906‎, 10-30-2017 01:14 PM
    • Replies: 1
    • Views: 223
    10-31-2017, 06:51 PM Go to last post
  21. Which test to use? - SPSS

    Hello everyone, It's my first time analyzing data and putting my results in a paper... My topic is in how far the educational attainment level...

    Started by annesch‎, 10-29-2017 10:36 AM
    spss, test method
    • Replies: 1
    • Views: 161
    10-30-2017, 12:13 AM Go to last post
  22. Probit regression - I'm not sure if I have a dependant variable

    Hello, My problem seems simple but I am a bit lost. Can I model a probit/logit regression over a survey in order to estimate the probability of...

    Started by jfca283‎, 10-29-2017 04:23 PM
    • Replies: 0
    • Views: 121
    10-29-2017, 04:23 PM Go to last post
  23. Regression table : Estimate the effect in the top half and the bottom half of the dis

    Hello everybody and thanks a lot for this forum, I'm quite bad with math but I'd really love to learn some statistics... I got stuck on the...

    Started by Cesco83‎, 10-29-2017 09:23 AM
    • Replies: 0
    • Views: 116
    10-29-2017, 09:23 AM Go to last post
  24. A novice in deep waters

    Hi guys I am in no way a statistical expert Ė my knowledge about the subject is limited to a few courses I participated in a couple of years ago...

    Started by anjoe112‎, 10-26-2017 06:33 AM
    • Replies: 1
    • Views: 243
    10-26-2017, 11:19 AM Go to last post
  25. Include or Exclude a Variable in Regression ?

    Dear all, Dr Timothy Z Keith advised that a new variable should not be included unless it is a common cause (associated with both dependent...

    Started by martinl‎, 10-23-2017 07:42 AM
    • Replies: 2
    • Views: 267
    10-23-2017, 07:29 PM Go to last post
  26. Question Linear regression with only these data σx/σy =1.2

    I have to demonstrate a linear relation between two variables X and Y using these data: σx/σy = 1.2. :mad: Small size effect required. Test...

    Started by angbee‎, 10-22-2017 11:02 AM
    • Replies: 0
    • Views: 377
    10-22-2017, 11:02 AM Go to last post
  27. Forward selection of non significant variables

    Hi, In SAS Enterprise Miner, I trained a logistic regression with forward selection and AIC criteria. I grouped rare levels for categorical...

    Started by MarcoVA‎, 10-21-2017 04:37 PM
    forward, information criterion, logisitic regression, statistic test, variable selection
    • Replies: 2
    • Views: 194
    10-21-2017, 09:21 PM Go to last post
  28. Multiple regression multigroup analysis in Amos

    I am testing the hypothesised effect in a model using SEM A -> B between two groups. The results of the standardised path coefficients (SPC) are...

    Started by Hansi‎, 10-21-2017 06:25 PM
    analysis, group size, multigroup, sem
    • Replies: 0
    • Views: 181
    10-21-2017, 06:25 PM Go to last post
  29. precision assessment of an experimental method

    Hi everyone, I have a very basic knowledge of statistics so apologies if the question is not formulated in appropriate terms. I really hope to get...

    Started by HannaMa‎, 10-21-2017 04:38 PM
    anova, assessment, coefficient of variation, precision
    • Replies: 0
    • Views: 144
    10-21-2017, 04:38 PM Go to last post
  30. IV regression help

    Hello everyone, Im confused about endogeneity and how to approach this problem in a case of one equation and multiple equations that are jointly...

    Started by Regressionhelp‎, 10-06-2017 02:26 AM
    iv; iv regression
    • Replies: 4
    • Views: 676
    10-19-2017, 09:10 AM Go to last post
  31. Converting a continuous variable into a categorical variable (low, medium, high)

    I have a continuous dependent variable (scores on an exam) and a number of predictor variables that I'd like to use in a regression analysis, such as...

    Started by tess2‎, 10-17-2017 12:08 AM
    categorical, percentiles, regression
    • Replies: 4
    • Views: 271
    10-17-2017, 10:43 AM Go to last post
  32. Ordinal logistic regression - How to get a single scoring function?

    Hi all, I'm running ordinal logistic regressions, with adjacent-category logits. The dependent variable has four ordered levels. So I have 3...

    Started by atrolle‎, 10-17-2017 04:33 AM
    adjacent-category logits, aggregation, linear predictors, ordinal logistic reg, single scoring function
    • Replies: 0
    • Views: 153
    10-17-2017, 04:33 AM Go to last post
  33. Question Controlling for time

    Hello, Thank-you for taking the time to read this post. I have managed to get myself very confused about what is (hopefully) quite a simple...

    Started by CathyK‎, 10-16-2017 08:15 AM
    control variable, logistic regression
    • Replies: 0
    • Views: 241
    10-16-2017, 08:15 AM Go to last post
  34. Simple Regression

    The manager of Colonial Furniture has been reviewing weekly advertising expenditures. During the past 6 months, all advertisements for the store...

    Started by vernonicamexie‎, 10-10-2017 01:32 PM
    • Replies: 0
    • Views: 212
    10-10-2017, 01:32 PM Go to last post
  35. Hierarchical Linear Modeling (HLM) Explanation

    I sought help actually doing an HLM a few weeks ago and found the assistance very helpful. Now, I'm curious about more of the actual meaning of...

    Started by Weibull‎, 10-09-2017 07:32 AM
    • Replies: 1
    • Views: 190
    10-09-2017, 09:07 AM Go to last post
  36. Stationarity and White noise

    Hi all, I'm just beginning to learn about time series analysis for my final year project at uni and I am confused about stationarity. A time series...

    Started by zeke512‎, 10-02-2017 10:57 AM
    • Replies: 4
    • Views: 367
    10-03-2017, 04:53 AM Go to last post
  37. Multiple linear regression in cross-country analysis with small sample size

    Hello, While conducting small studentís research project Iíve faced a little problem. Iím using aggregated country data (not in individual, but...

    Started by AloisDusek‎, 10-01-2017 07:10 AM
    • Replies: 0
    • Views: 278
    10-01-2017, 07:10 AM Go to last post
  38. Hierarchical Linear Modeling (HLM) Assistance

    Sorry if this gets posted twice (it doesn't look like it has posted the first time as of now). I asked a question about fixed vs. random effects...

    Started by Weibull‎, 09-27-2017 10:26 AM
    • Replies: 4
    • Views: 415
    09-28-2017, 04:40 AM Go to last post
  39. Logit Transformation: Interpreting the Coefficients

    Hi all, I'm currently doing an empirical project in econometrics. I examine the effect of globalisation and some other control variables on...

    Started by Markst‎, 09-24-2017 08:57 AM
    • Replies: 2
    • Views: 348
    09-26-2017, 08:55 AM Go to last post
  40. combining error terms for two dissimilar regressions

    I have a linear regression for Y on X, and a power regression for Z on Y, each having associated error. (the Y values are different (independent) in...

    Started by George Kraemer‎, 09-21-2017 11:32 AM
    • Replies: 13
    • Views: 671
    09-25-2017, 02:36 PM Go to last post
  41. Fixed effects / clustered standard error in multi-level data

    Hi everyone :) I'm analyzing the effect of political corruption on the bid-ask spread of US political entities, namely my data set consists of...

    Started by Physiokrat‎, 09-25-2017 08:22 AM
    • Replies: 0
    • Views: 201
    09-25-2017, 08:22 AM Go to last post
  42. Estimating impact of Predictor

    Hi, I have a simple regression with 24-36 months of data, let's say of Sales which is the dependant variable and % spend on promotions in that...

    Started by confusedguy15‎, 09-22-2017 07:50 AM
    • Replies: 3
    • Views: 271
    09-22-2017, 08:59 AM Go to last post
  43. Spend against views/day. Include days of no spend?

    Hi everyone, just looking at doing some simple linear regression and I've got views on an article. Occasionally we choose to spend a bit of money...

    Started by Edorian‎, 09-20-2017 11:41 PM
    • Replies: 0
    • Views: 243
    09-20-2017, 11:41 PM Go to last post
  44. Residual Modelling and Generating Scenarios for variables

    newbie here with a trivial question. i am trying to create scenarios on a set of macro variables. i started with creating a bayesian VAR model on...

    Started by eemrun‎, 09-20-2017 09:33 PM
    forecast, forecast error, var
    • Replies: 0
    • Views: 193
    09-20-2017, 09:33 PM Go to last post
  45. OLS vs solving a system of linear equaions

    If i want to solve y=Xb, where y is a vector of observations and X a matrix of independent variables i could use ordinary least squares to estimate...

    Started by Prometheus‎, 09-14-2017 07:49 AM
    • Replies: 11
    • Views: 635
    09-20-2017, 08:06 AM Go to last post
  46. Post two sided multivariate

    Hi, I have a question, what will I do with this? In univariate analysis, if the population standard deviation σ is known, the appropriate...

    Started by Sonyver‎, 09-19-2017 03:25 AM
    • Replies: 0
    • Views: 205
    09-19-2017, 03:25 AM Go to last post
  47. ANOVA with multiple imputed Data

    Hello :) I used multiple imputation on my data to get a complete data set. I want to do a ANOVA now. Does anybody know how to do that correctly? ...

    Started by froop91‎, 09-06-2017 04:37 AM
    2 Pages
    1 2
    • Replies: 23
    • Views: 1,315
    09-15-2017, 04:15 AM Go to last post
  48. Logistic regression - a very simple question

    I have a question regarding the likelihood. I am trying to assess the likelihood of being in a family history positive group (FH+) on alcoholism (0...

    Started by yadayada‎, 07-26-2017 05:54 PM
    • Replies: 13
    • Views: 1,033
    09-13-2017, 06:03 PM Go to last post
  49. Repeated Measures - moderation / two outcomes issue

    Hey folks! By what procedure can I test whether the association between two dependent variables D1 and D2 changes as a function of within-subject...

    Started by Martin Marko‎, 09-13-2017 12:03 PM
    • Replies: 0
    • Views: 261
    09-13-2017, 12:03 PM Go to last post
  50. Power analysis for time series regression

    Hello, I'm trying to determine the sample size I need for a study. In the analysis, I will be including three predictors (score on a questionnaire,...

    Started by psychstudent0798‎, 09-07-2017 08:00 PM
    power analysis, regression, time series regression
    • Replies: 1
    • Views: 338
    09-08-2017, 04:50 AM Go to last post
  51. backwards stepwise multiple regression, collinearity. Rejected paper.

    Hi helpful people! My research paper was recently rejected and some of the feedback I received was in relation to the statistical tests done/not...

    Started by potatopatch‎, 09-04-2017 05:33 PM
    collinearity, stepwise regression
    • Replies: 13
    • Views: 695
    09-06-2017, 05:53 PM Go to last post
  52. linear regression - coefficients too high (data in % as an alternative?)

    Hi everyone, I am new to statistics and I have to run 3 separate simple linear regressions (I averaged the data from 2003-2015 in order to run a...

    Started by Francesca-M‎, 09-05-2017 03:13 AM
    • Replies: 0
    • Views: 241
    09-05-2017, 03:13 AM Go to last post
  53. Firth regression and AIC-based model selection

    Dear all, when using Firth's bias reduction method (Firth 1993) to fit logistic regressions, is it possible (sensible) to compare models using AIC? ...

    Started by Luke‎, 09-01-2017 08:04 AM
    aic, firth regression
    • Replies: 4
    • Views: 554
    09-01-2017, 03:41 PM Go to last post
  54. Question on Impact of Independent Variable Interpretation

    Hi, Suppose i have a normal linear regression construct, like Sales = Intercept + M1*X1 + M2*X2 + M3*X3 Suppose X1,X2,X3 are the...

    Started by kaos1511‎, 09-01-2017 01:24 PM
    regression, regression analysis, regression coefficent
    • Replies: 3
    • Views: 348
    09-01-2017, 03:30 PM Go to last post
  55. Fixed vs. Random Effects

    I'm wondering if someone could help me to correctly identify whether certain variables should be considered fixed or random effects. Just as...

    Started by Weibull‎, 08-28-2017 09:38 AM
    difference, effects, fixed, random
    • Replies: 6
    • Views: 523
    08-29-2017, 04:43 AM Go to last post
  56. [Linear Regression] Regression with aggregated or separated years?

    Hello to everyone! :wave: I should do some regressions but i've an important and simple question... my dataset have this structure: ...

    Started by andre94‎, 08-25-2017 09:32 AM
    aggregation, linear regression, regression analysis
    • Replies: 4
    • Views: 408
    08-25-2017, 12:00 PM Go to last post
  57. Interaction effects regression wiith dummy variables

    Hello everyone, I am doing an analysis about the export diversification effect during the financial crisis. I have my dependent variable as log...

    Started by doug_aguilar‎, 08-24-2017 07:34 AM
    dummy variables, estimating equations, multicollinearity, regression analysis
    • Replies: 5
    • Views: 481
    08-25-2017, 09:19 AM Go to last post
  58. How to handle dummy variable with fraction as possible values

    Hello , I am working on a data with a dummy variable values not just 0 or 1. It has fractions as values which denote the number of month within a...

    Started by samisan‎, 08-12-2017 04:42 PM
    • Replies: 5
    • Views: 602
    08-13-2017, 05:27 AM Go to last post
  59. Interaction / Moderation effect linear regression

    Hi, I have a question regarding a moderation effect with linear regression. I have hypothesized for a significant main effect and another...

    Started by diederikvanduuren‎, 08-01-2017 03:34 PM
    • Replies: 6
    • Views: 779
    08-12-2017, 11:34 AM Go to last post
  60. Determine Confounding using Multivariate analysis

    After we adjusted for confounders in the Multivariate analysis, How do we determine that if the variable is confounding or not? I read somewhere...

    Started by sandyzman‎, 08-11-2017 01:49 PM
    • Replies: 1
    • Views: 330
    08-11-2017, 02:04 PM Go to last post

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