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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. 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: 764
    03-03-2016, 12:57 PM Go to last post
  2. 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: 589
    03-02-2016, 08:58 AM Go to last post
  3. 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: 1,198
    03-01-2016, 01:32 PM Go to last post
  4. 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: 851
    03-01-2016, 07:40 AM Go to last post
  5. 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: 800
    02-29-2016, 12:00 PM Go to last post
  6. 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: 1,659
    02-29-2016, 08:52 AM Go to last post
  7. 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 12:44 PM
    • Replies: 10
    • Views: 10,449
    02-27-2016, 11:51 PM Go to last post
  8. 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: 2,390
    02-25-2016, 12:06 PM Go to last post
  9. 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: 1,173
    02-25-2016, 05:14 AM Go to last post
  10. 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: 3,227
    02-24-2016, 03:02 PM Go to last post
  11. 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: 1,110
    02-24-2016, 08:49 AM Go to last post
  12. 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: 573
    02-23-2016, 09:02 AM Go to last post
  13. 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: 1,027
    02-22-2016, 09:33 PM Go to last post
  14. 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: 1,010
    02-22-2016, 05:10 PM Go to last post
  15. 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: 1,927
    02-22-2016, 08:59 AM Go to last post
  16. 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: 1,282
    02-20-2016, 07:48 AM Go to last post
  17. 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: 1,446
    02-16-2016, 09:19 AM Go to last post
  18. 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: 792
    02-16-2016, 07:07 AM Go to last post
  19. 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: 1,618
    02-15-2016, 04:29 AM Go to last post
  20. 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: 910
    02-12-2016, 07:57 AM Go to last post
  21. 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: 1,603
    02-10-2016, 08:48 AM Go to last post
  22. 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: 853
    02-10-2016, 03:12 AM Go to last post
  23. 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: 1,362
    02-09-2016, 11:00 AM Go to last post
  24. 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: 1,198
    02-08-2016, 07:39 PM Go to last post
  25. 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: 1,278
    02-08-2016, 05:29 AM Go to last post
  26. 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: 654
    02-03-2016, 05:09 PM Go to last post
  27. 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: 765
    02-03-2016, 12:01 AM Go to last post
  28. 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: 900
    02-02-2016, 11:10 AM Go to last post
  29. 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: 749
    02-02-2016, 10:42 AM Go to last post
  30. 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: 1,534
    02-01-2016, 10:37 AM Go to last post
  31. [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: 870
    02-01-2016, 10:25 AM Go to last post
  32. 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: 852
    01-30-2016, 08:00 AM Go to last post
  33. 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: 741
    01-28-2016, 05:57 PM Go to last post
  34. 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: 1,605
    01-28-2016, 09:19 AM Go to last post
  35. 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: 1,635
    01-28-2016, 06:13 AM Go to last post
  36. 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: 1,751
    01-27-2016, 11:17 PM Go to last post
  37. 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: 1,161
    01-27-2016, 01:18 PM Go to last post
  38. 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: 2,002
    01-26-2016, 12:11 PM Go to last post
  39. Can I use multivariate analysis without univariate analysis?

    Dear all, I have a problem in my data analysis and paper writing. Some variables (dependents) were not statistically significantly correlated...

    Started by celinetang‎, 04-02-2013 05:39 AM
    • Replies: 14
    • Views: 21,604
    01-26-2016, 11:08 AM Go to last post
  40. Can AIC values be combined?

    Hello! I have hunted far and wide on the net in an attempt to answer this. Essentially, I'm trying to combine two AIC scores from different parts...

    Started by Alaska15‎, 01-26-2016 12:45 AM
    aic, combining models, growth curve, logistic regression, nonlinear regression
    • Replies: 1
    • Views: 1,598
    01-26-2016, 04:10 AM Go to last post
  41. Interpreting coefficients in pooled cross-sectional data with cluster-dummies

    Data: pooled cross-sectional data. 6 countries. 3 years of cross sectional data (10 year gaps in between), with different samples of individuals in...

    Started by Stropharia‎, 01-25-2016 10:15 PM
    cross-sectional, fixed effects model, regression coefficients
    • Replies: 0
    • Views: 707
    01-25-2016, 10:15 PM Go to last post
  42. What to do about violations of assumptions

    This is one example of a larger topic Say you are doing logistic regression and you have influential data points. You can't use robust regression...

    Started by noetsi‎, 01-25-2016 12:53 PM
    • Replies: 9
    • Views: 1,204
    01-25-2016, 06:01 PM Go to last post
  43. The Tobit Model

    Greatings for all, Suppose we are using the Latent Variable Formulation (i.e. not the Generalized Linear Modeling) for a multiple regression model...

    Started by Vivo Gharib‎, 01-25-2016 07:03 AM
    • Replies: 0
    • Views: 820
    01-25-2016, 07:03 AM Go to last post
  44. Positive definite issue with Likert data

    Hello, I ran my first data set through SPSS for a recent 5-point Likert questionnaire but am returning a "not positive definite" on the reduction. ...

    Started by jonwilliams‎, 01-24-2016 01:36 PM
    • Replies: 0
    • Views: 1,384
    01-24-2016, 01:36 PM Go to last post
  45. Which test for cont DV, 1 nominal IV (2 cat) + 1 nominal IV (4 cat) + 1 cont IV

    Hello, I am a bit struggling with choosing which test I should apply to my data. My dependent variable is continuous (participants could score...

    Started by Pernelle‎, 01-22-2016 06:26 AM
    • Replies: 4
    • Views: 2,059
    01-24-2016, 07:30 AM Go to last post
  46. Different signs

    Hello everybody: I have a litte problem interpreting my regression output. In the first regression, I have a continuous variable with a...

    Started by Student90‎, 01-23-2016 08:44 AM
    • Replies: 5
    • Views: 1,509
    01-24-2016, 05:09 AM Go to last post
  47. Ordinal Time-Series Dependent Variable

    I am attempting to run a regression with an ordinal DV that is panel/time series data. I only have SPSS and with the ordinal DV, it seems I should be...

    Started by COB1010‎, 01-23-2016 04:38 PM
    • Replies: 3
    • Views: 1,455
    01-23-2016, 05:00 PM Go to last post
  48. [R]: ROC curve after fitting a logistic model to a new datset

    Hello, I have fitted a Logistic Regression model (with 1 binary DV, and several IVs), and then I fitted it to a new dataset using the function...

    Started by gianmarco‎, 01-22-2016 08:24 AM
    • Replies: 5
    • Views: 1,090
    01-23-2016, 06:45 AM Go to last post
  49. fit an ARIMA-model with t -distributed innovation terms

    Hello, I have to fit an ARIMA-model with t -distributed innovation terms (skew-t) with software R. If I use arima function (package "stats") I...

    Started by cristal‎, 01-22-2016 10:41 AM
    • Replies: 0
    • Views: 691
    01-22-2016, 10:41 AM Go to last post
  50. Bounds for R2 in OLS regression?

    Context: From the big dataset Iím working with, my boss is somewhat curious (read skeptic) as for why fitting a multiple linear regression with...

    Started by spunky‎, 01-21-2016 07:57 PM
    • Replies: 1
    • Views: 847
    01-21-2016, 09:27 PM Go to last post
  51. Question Regression Type Estimation

    Hello, Attached is a time series data that has a plot of the percentage of breakdowns on a scheduled hours across the days. The objective is to...

    Started by Mukund‎, 01-20-2016 07:08 AM
    • Replies: 4
    • Views: 1,261
    01-21-2016, 09:06 AM Go to last post
  52. Regression with skewed data

    Our data is highly skewed, so much so that we routinely report median values not average ones in descriptive models. Now I am running regression with...

    Started by noetsi‎, 01-20-2016 05:02 PM
    • Replies: 3
    • Views: 1,787
    01-21-2016, 04:16 AM Go to last post
  53. Alternatives to ANCOVA? Unequal slopes.

    Hello, and thank you for your help on my question. My goal is to compare multiple groups to determine if a certain "variable of interest" is...

    Started by mgranatosky‎, 01-19-2016 11:04 PM
    • Replies: 5
    • Views: 1,358
    01-20-2016, 03:55 PM Go to last post
  54. Power analysis and sample size

    Hello all, I've used perused this site numerous times in the past for assistance with statistical issues, but this is my first post. I work with...

    Started by biosci1978‎, 01-19-2016 03:54 PM
    linear regression, power analysis, sample size
    • Replies: 0
    • Views: 796
    01-19-2016, 03:54 PM Go to last post
  55. Cant do a linear regression on a subset of my data: Error

    I installed the R package AER, from which you get the data `PSID1982`. Then I define this model: data("PSID1982") set.seed(15606) ...

    Started by Latriuz‎, 01-17-2016 11:53 AM
    • Replies: 0
    • Views: 480
    01-17-2016, 11:53 AM Go to last post
  56. Logistic model in overall population or in sub-population?

    Hello, I am not sure if this is the right place to ask my question. I really appreciate your help because I am really a beginner in bio...

    Started by johnstatistic‎, 01-15-2016 09:26 PM
    • Replies: 3
    • Views: 869
    01-15-2016, 11:01 PM Go to last post
  57. Comparing the outcome of two contingency tables

    Hi all, I have a data set for two different days. The treatments and outcomes are same but the assays were performed on two different days. I...

    Started by skgatx‎, 01-13-2016 09:31 PM
    • Replies: 4
    • Views: 1,160
    01-15-2016, 12:55 PM Go to last post
  58. How to test for difference between 2 R-Squared in Binary Hierarchical Regression?

    I ran a BINARY hierarchical regression in SPSS. However, I could not find an option to test change in R-Squared. So is there a way to test it in...

    Started by wannafly‎, 01-15-2016 09:18 AM
    • Replies: 3
    • Views: 1,182
    01-15-2016, 10:14 AM Go to last post
  59. Unimodal Link-function possible?

    Hi, using a GLM model (e.g. a Poisson regression), there are various link functions available in statistical packages. However, I don't find an...

    Started by mmercker‎, 01-08-2016 03:14 AM
    glm regression, link function, normal curve, probit
    • Replies: 6
    • Views: 1,170
    01-13-2016, 04:03 PM Go to last post
  60. Instrumental variable apporach: two stage least squares

    Hello everyone, I want to test cross sectional data with a household survey with 60k plus of respondents (however missing data result in overall...

    Started by Carlos_1‎, 01-11-2016 03:38 PM
    • Replies: 1
    • Views: 1,268
    01-11-2016, 08:05 PM Go to last post

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