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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Introductory references about total least squares

    I am an engineering student and I've been recently told about the Total Least Square (TLS) method. I am interested in applying it to topographic...

    Started by julitocolon‎, 03-18-2016 11:14 AM
    least-squares, orthogonal regression, references, regression, total least squares
    • Replies: 1
    • Views: 235
    03-18-2016, 11:37 AM Go to last post
  2. Partial effect plot: Which options do I have?

    Hi, I have a multiple regression model, and I would like to do an effect plot with confidence bands regarding one of the predictors. One solution...

    Started by mmercker‎, 03-16-2016 12:38 PM
    confidence bands, effect plot, regression plot
    • Replies: 4
    • Views: 515
    03-17-2016, 03:21 AM Go to last post
  3. Cool Research Method questions

    Thanks guys for the response, it was great

    Started by jazeid05‎, 03-15-2016 09:29 PM
    • Replies: 3
    • Views: 427
    03-16-2016, 11:29 AM Go to last post
  4. Prediction Plot with CI's: What to do with covariates?

    Hi, I have a multiple regression model (especially a GLMM), with - outcome Y, - a fixed effect predictor wich is in the main focus of...

    Started by mmercker‎, 03-15-2016 06:21 AM
    confidence interval, partial effect, regression plot
    • Replies: 0
    • Views: 269
    03-15-2016, 06:21 AM Go to last post
  5. MSE vs variance of residuals

    Can someone help me understand the distinction between the Mean Square Error and the variance of the residuals i)] in a linear regression? I thought...

    Started by pgseye‎, 03-15-2016 05:28 AM
    • Replies: 0
    • Views: 410
    03-15-2016, 05:28 AM Go to last post
  6. Use of partial regression plots to check for non-linearity

    These are commonly recommended to detect non-linearity in interval level predictors. I ran these in SAS and I have a difficult time interpreting the...

    Started by noetsi‎, 03-11-2016 01:53 PM
    2 Pages
    1 2
    • Replies: 19
    • Views: 1,234
    03-14-2016, 04:28 PM Go to last post
  7. Fishing with data: Use of multiple regressions on the same data set

    I have approached this issue, running multiple models with the same data set usually in the context of FW error . It is the habit of running multiple...

    Started by noetsi‎, 03-14-2016 12:31 PM
    • Replies: 2
    • Views: 324
    03-14-2016, 02:25 PM Go to last post
  8. Linear regression vs logistic regression

    I have a time series dataset. The, X (Independent variable) is time and is denoted as 1,2,3,4,5,6..1000.etc Y (Dependent variable ) is a...

    Started by Mukund‎, 03-12-2016 09:54 AM
    linear regression, logistic regression
    • Replies: 2
    • Views: 525
    03-14-2016, 09:28 AM Go to last post
  9. Test of non-linearity

    How do you actually test for non-linearity in linear regression. I have heard Box-Tidwel test mentioned, but I have yet to find out how you do it. ...

    Started by noetsi‎, 03-11-2016 09:27 AM
    • Replies: 0
    • Views: 335
    03-11-2016, 09:27 AM Go to last post
  10. Unhappy Regression: DV is Revenue and IDV is cost. (Very High MAPE)

    Need help on one of the modelling assignment. My dependent variable is Revenue and the independent variable is Cost beside some other variables...

    Started by vikash_124124‎, 03-09-2016 01:47 AM
    mape, regression
    • Replies: 8
    • Views: 637
    03-11-2016, 09:24 AM Go to last post
  11. (Poisson/NegBin, RE) Estimation of time-invariant predictors in a panel model

    Hello dear forum members, For a time being I had been working with the following model (Stata command format): - xtpoisson y x1 x2 x3 x4 x5, fe-...

    Started by kiton‎, 03-10-2016 02:03 PM
    negative binomial, poisson, random-effects, time-invariant
    • Replies: 3
    • Views: 565
    03-10-2016, 05:02 PM Go to last post
  12. Question Dummy variable in a Fixed effects (FE) model

    Hello :-) I am doing a paper where I examine the Scandinavian welfare model effect on inequality in the Scandinavian countries. I examine it using...

    Started by JoLinda91‎, 03-03-2016 05:54 AM
    • Replies: 4
    • Views: 617
    03-10-2016, 02:35 PM Go to last post
  13. 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: 946
    03-10-2016, 11:56 AM Go to last post
  14. regression of car accidents vs age (question about normality and implement gender)

    a few basic questions. I'm just starting to learn regression so I'm trying to apply what I'm learning. I have a set of data with ages ranging...

    Started by semidevil‎, 03-03-2016 09:38 PM
    • Replies: 14
    • Views: 1,260
    03-09-2016, 05:11 PM Go to last post
  15. Question about linear regression & residuals

    I have been reading up on linear regression and residual plots here on stattrek: http://stattrek.com/regression/residual-analysis.aspx?Tutorial=AP...

    Started by pablowilks‎, 03-08-2016 03:24 PM
    • Replies: 2
    • Views: 444
    03-09-2016, 07:46 AM Go to last post
  16. Categorical variables changing by their groupmean

    Hi For a project I need to model industrial data. Large part of the dataset consists out of nominal categorical variables (430 variables in total...

    Started by studentbelg‎, 03-08-2016 05:20 PM
    • Replies: 0
    • Views: 323
    03-08-2016, 05:20 PM Go to last post
  17. When to specify an interaction effect

    I have a model with about 20 variables in it (6 of them are dummies from a categorical variable with 7 levels). All of these are suggested by the...

    Started by noetsi‎, 03-08-2016 09:26 AM
    • Replies: 4
    • Views: 487
    03-08-2016, 01:18 PM Go to last post
  18. Assignment

    Please may you help me answer the question, I'm stuck. Thanx!! A property analyst is examining the relationship between the City councilís...

    Started by natra‎, 02-22-2016 06:43 AM
    • Replies: 2
    • Views: 548
    03-08-2016, 04:22 AM Go to last post
  19. Using median case load as a predictor

    I am testing the impact of a contractor or a public unit working with a customer . A big part of this is generating control variables so I can...

    Started by noetsi‎, 03-07-2016 05:56 PM
    • Replies: 1
    • Views: 374
    03-07-2016, 07:49 PM Go to last post
  20. Prediction Intervals

    I am in the process of calculating the prediction intervals on a time series data linear regression model The independent variable in my model is...

    Started by Mukund‎, 03-07-2016 04:58 AM
    prediction interval, regression
    • Replies: 0
    • Views: 340
    03-07-2016, 04:58 AM Go to last post
  21. Good Tool to generate probability of a sale for 300,000 products

    Hi - I am trying to determine a good tool that will help me generate a probability of a sale for a list of of 300,000 products. I have a table of...

    Started by BlendRed3‎, 03-06-2016 01:37 PM
    • Replies: 0
    • Views: 312
    03-06-2016, 01:37 PM Go to last post
  22. Nonparametric regression using kernel weights

    Hi! I am wondering how I can present the results of nonparametric regression. I performed the nonparametric tests using R, and R package 'np'. ...

    Started by nieve5552‎, 03-05-2016 09:57 PM
    nonparametric, reporting results, reporting statistics, results
    • Replies: 0
    • Views: 384
    03-05-2016, 09:57 PM Go to last post
  23. Which SSR (Regression sum of squares) is theoretically larger?

    Dear all, I have 3 fitted lines: Y = b0 + (b1)X Y = (0.5)b0 + (b1)X Y = b0 + 0.5(b1)X Where and In addition to the the 3 equations...

    Started by UniApply‎, 03-03-2016 12:10 PM
    • Replies: 2
    • Views: 320
    03-03-2016, 12:57 PM Go to last post
  24. MANOVA or Multivariate Regression? please help clarify

    Hi, Really hope someone can confirm. I think I need to use Multivariate regression for this; - one group of N judges score N performances and...

    Started by GiantCorn‎, 03-02-2016 08:58 AM
    • Replies: 0
    • Views: 306
    03-02-2016, 08:58 AM Go to last post
  25. Two variable OLS Regression - using normal equations

    Hi, I am experiencing difficulties in understanding the following question; I have been assigned two variables (X and Y), and have been...

    Started by UniApply‎, 03-01-2016 01:32 PM
    linear regression, normal equations, ols regression, regression analysis, two variables
    • Replies: 0
    • Views: 368
    03-01-2016, 01:32 PM Go to last post
  26. Split file regression, or Fixed effects Mixed model

    Within a dataset that has a few variables explaining dependent variable A, and influences vary over different categories, it can be obvious to split...

    Started by joostvanvlimmeren‎, 03-01-2016 06:21 AM
    fixed effect, fixed effect model, mixed effect, regression, split file
    • Replies: 2
    • Views: 358
    03-01-2016, 07:40 AM Go to last post
  27. Cool Linear regression on data with standard deviations?

    (crossposting from here) I am trying to do many linear regressions on series of data points where each data point is associated with a standard...

    Started by Sosi‎, 02-29-2016 12:00 PM
    linear regression
    • Replies: 0
    • Views: 312
    02-29-2016, 12:00 PM Go to last post
  28. Regression Analysis for Paired Data SAS

    Hi Everybody, I want to analyze paired data using regression analysis to adjust for covariates. I used PROC MIXED statement in SAS and I modeled...

    Started by Mai Mehanna‎, 02-27-2016 08:34 PM
    • Replies: 6
    • Views: 701
    02-29-2016, 08:52 AM Go to last post
  29. Multivariate regression with paired samples?

    Hello, First time poster here. I have data from two groups of people recorded during two different conditions. I would like to study how the...

    Started by mnd‎, 04-02-2013 01:44 PM
    • Replies: 10
    • Views: 5,338
    02-27-2016, 11:51 PM Go to last post
  30. Association between categorical and numerical variables using R

    Hi, I am new to this forum so please be kind :-). Not sure if this belongs in 'R'. I will describe my problem as good as I can. First of all I am...

    Started by MasterStudent‎, 02-25-2016 07:43 AM
    chi square, general linear model, r commander
    • Replies: 5
    • Views: 673
    02-25-2016, 12:06 PM Go to last post
  31. Talking Ordinal logistic regression or linear regression?

    Hi Guys, just wondering if I could have your help pls. I have a sample size of 55 patients (of which 22 were subsequently diagnosed with Heart...

    Started by skaur‎, 02-25-2016 05:14 AM
    • Replies: 0
    • Views: 324
    02-25-2016, 05:14 AM Go to last post
  32. What is the difference between an interaction effect and a moderator in regression?

    I hear these two concepts a lot in the literature. I have no idea what the difference is between a moderator and an interaction term. While I am...

    Started by noetsi‎, 01-28-2016 01:56 PM
    2 Pages
    1 2
    • Replies: 24
    • Views: 1,503
    02-24-2016, 03:02 PM Go to last post
  33. Panel Data Regression Models!

    Hello mates! I am doing thesis (research) as part of my degree completion requirement. My topic is a general one ďCapital Structure and Corporate...

    Started by Jibran‎, 02-01-2016 01:58 PM
    • Replies: 1
    • Views: 470
    02-24-2016, 08:49 AM Go to last post
  34. Pearson correlation coefficient and Standard dev

    I know the basic interpretation of r. I.e., -1(<or =)r(<or=1). Critical values for n etc. However, while helping a research nursing student, her...

    Started by Joolz‎, 02-23-2016 09:02 AM
    • Replies: 0
    • Views: 313
    02-23-2016, 09:02 AM Go to last post
  35. Is this really independent

    I read an article today that made me wonder. They used linear regression to predict income at closure. One of their predictor variables was income...

    Started by noetsi‎, 02-22-2016 06:00 PM
    • Replies: 3
    • Views: 506
    02-22-2016, 09:33 PM Go to last post
  36. Ordinal predictors

    I know there was a thread on this. I could not find it. This is the type of issue that concerns me. These authors had an ordinal predictor that...

    Started by noetsi‎, 02-22-2016 11:44 AM
    • Replies: 8
    • Views: 593
    02-22-2016, 05:10 PM Go to last post
  37. Solving Multicollinearity Issues

    Dear Community, Currently I am modeling a multiple regression for a research project with Stata. I want to examine the influence of...

    Started by AntonR‎, 02-05-2016 09:53 AM
    • Replies: 11
    • Views: 992
    02-22-2016, 08:59 AM Go to last post
  38. Question Reporting results of nonparametric regression

    Hi! I am wondering how you present the results of non parametric regression test. I run the nonparametric regression using R, and the package np ...

    Started by nieve5552‎, 02-19-2016 08:51 PM
    nonparametric, regression, results, rstats, statistics
    • Replies: 1
    • Views: 489
    02-20-2016, 07:48 AM Go to last post
  39. Unhappy Help with Interactaction Assesment

    Hello! Can anyone explain why my Breslow-Day test for interaction was significant (p=0.0005) but my forward selection logistic regression test for...

    Started by Naxaris‎, 02-15-2016 07:58 PM
    • Replies: 7
    • Views: 703
    02-16-2016, 09:19 AM Go to last post
  40. Multiple Choice Question Answer

    Is there any materials with multiple choice answer for basic statistics? If yes, How can I get it?

    Started by Saroj Pokhrel‎, 02-16-2016 07:07 AM
    • Replies: 0
    • Views: 278
    02-16-2016, 07:07 AM Go to last post
  41. Lightbulb Multiple Regression to receive cost for a single item of an order

    Hi everybody, I appreciate any kind of help and tips: Problem: - I have a dataset with 1600 orders - For each of these orders I know the...

    Started by christoph_b‎, 02-03-2016 05:02 PM
    • Replies: 7
    • Views: 879
    02-15-2016, 04:29 AM Go to last post
  42. anova repeated measures with interaction term

    i hva been sitting here for 6 hours trying to figure out what i am doing wrong, but i cant figure it out. I am doing anova with repeated measures....

    Started by ama_nil‎, 02-12-2016 07:57 AM
    • Replies: 0
    • Views: 347
    02-12-2016, 07:57 AM Go to last post
  43. Effects of general participation and intensity of participation

    Exploring data from a quasi-experimental study, we want to investigate effects of general participation in a program (dichotomous; part_dich) aswell...

    Started by l.frei‎, 02-08-2016 05:30 AM
    general participation, participation intensity, quasi-experimental study
    • Replies: 5
    • Views: 789
    02-10-2016, 08:48 AM Go to last post
  44. Best way to treat integer/float column with null values in logistic regression

    Hi, I was wondering if anyone can assist me with this issue. I am building a logistic regression model to predict purchase or not purchase...

    Started by rodule‎, 02-04-2016 05:13 PM
    logistic regression, python, scipy
    • Replies: 1
    • Views: 419
    02-10-2016, 03:12 AM Go to last post
  45. Need Help for explain variables

    Hello Dear Members, I am doing a research on Corporate R&D and market capitalization with 5 variables. There in no co linearity between my study...

    Started by Usmanhcbf‎, 02-08-2016 02:08 AM
    • Replies: 3
    • Views: 477
    02-09-2016, 11:00 AM Go to last post
  46. Smile twoway ANOVA, post hoc test? New to statistics.

    This is probably easy, but this is new to me, hoping for some help here:tup:

    Started by ama_nil‎, 02-08-2016 05:44 AM
    anova, newbie
    • Replies: 1
    • Views: 395
    02-08-2016, 07:39 PM Go to last post
  47. Confidence bands for a linear regression with X and Y errors

    Dear all, I have been searching for a while without finding a solution, so I hope someone here can help. Here is my problem: I have (X, Y)...

    Started by quentin.flm‎, 02-05-2016 09:23 AM
    • Replies: 5
    • Views: 531
    02-08-2016, 05:29 AM Go to last post
  48. Bayesian multiple regression issue in R

    I am attempting to generate a multiple regression model using JAGS on R and my results deviate substantially from MCMCregress and lm. I ran out of...

    Started by micdhack‎, 02-03-2016 05:09 PM
    • Replies: 0
    • Views: 368
    02-03-2016, 05:09 PM Go to last post
  49. Correlation for Binary Target Variable

    Hi, Just need someone to do a sanity for me. In linear regression, one might want to transform (log, power, etc...) a continuous independent...

    Started by Oberon‎, 02-03-2016 12:01 AM
    • Replies: 0
    • Views: 354
    02-03-2016, 12:01 AM Go to last post
  50. How do I test the significance of my correlation coefficients for various regressions

    Hi, I have a set of 25 points and I used a TI-84 calculator to calculate the linear, quadratic, logistic, exponential, and power regression models...

    Started by JohnDoeMath‎, 02-02-2016 11:10 AM
    correlation analysis, p-value, regression analysis, regression model, significance
    • Replies: 0
    • Views: 309
    02-02-2016, 11:10 AM Go to last post
  51. New Linear Regression Approach - Link Here

    My company has just released a free software download that eliminates known issues associated with traditional techniques. The InoraRAE has a simple...

    Started by OmniBear‎, 02-02-2016 10:42 AM
    linear, regression
    • Replies: 0
    • Views: 269
    02-02-2016, 10:42 AM Go to last post
  52. Should you use Bonferonni for regression

    It is common to generate many models in regression and only report the final one. To me this suggests that you should use some correction like...

    Started by noetsi‎, 01-30-2016 02:52 PM
    • Replies: 10
    • Views: 856
    02-01-2016, 10:37 AM Go to last post
  53. [R] Shapley values and relaimpo

    Hello everyone! Iíve been pondering this question for some time. Iíve searched online and on this forum and I havenít found the answer to my...

    Started by gheorghiu.alexandra‎, 02-01-2016 10:25 AM
    regression analysis, shapley value
    • Replies: 0
    • Views: 316
    02-01-2016, 10:25 AM Go to last post
  54. Correlation and regression

    Hello, it would be nice if you could provide the appropriate theoretical steps for the following task: There is a shop which also operates a pub....

    Started by DZ8‎, 01-30-2016 08:00 AM
    • Replies: 0
    • Views: 376
    01-30-2016, 08:00 AM Go to last post
  55. ANCOVA coding of categorical covariates

    Hello all, I am running an ANCOVA in R (Anova function) to assess the results of a randomized experimental study. I have a 2x2 full factorial...

    Started by Mark77‎, 01-28-2016 05:57 PM
    ancova, categorical covariates, gender
    • Replies: 0
    • Views: 369
    01-28-2016, 05:57 PM Go to last post
  56. Trend analysis / regression model with missing data

    Hi, I want to apply a Poisson GLM to count data, analyzing trends. However, there are missing counts (i.e. missing values in the outcome variable)...

    Started by mmercker‎, 01-26-2016 07:18 AM
    imputation, missing data, regression analysis, trend analysis
    • Replies: 8
    • Views: 703
    01-28-2016, 09:19 AM Go to last post
  57. Likert Scale Survey_regression analysis

    Dear all, I am new in this, so please help - I am conducting a survey for my thesis using Likert method. Through this research survey I would like...

    Started by Monjurul‎, 01-25-2016 09:47 AM
    • Replies: 13
    • Views: 934
    01-28-2016, 06:13 AM Go to last post
  58. Simple Linear Regression

    Dear Experts, Q1) In simple linear regression: a) Under what situations will the estimates b0 and b1 not be well-defined? b) What is the...

    Started by Tony_Danny‎, 01-27-2016 10:12 PM
    • Replies: 2
    • Views: 573
    01-27-2016, 11:17 PM Go to last post
  59. Regression following MANOVA results

    Hi Stats Gurus, This question is about a regression analysis that I want to run, but I am not too familiar with this type of analysis. I have...

    Started by jarbski2‎, 01-27-2016 11:54 AM
    manova, regression analysis
    • Replies: 5
    • Views: 434
    01-27-2016, 01:18 PM Go to last post
  60. Regression on Survey analysis across 50 states

    I ran a survey across all 50 states in the US. The goal is to see if there is a correlation between people's love for the state and the population...

    Started by vkredi‎, 01-26-2016 12:11 PM
    multilevel analysis, regression, regression analysis, survey, survey analysis
    • Replies: 0
    • Views: 372
    01-26-2016, 12:11 PM Go to last post

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