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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. % dependent and independent variables

    Hi all is a linear regression model appropriate when both the dependent and independent variables are % values of the total population in any given...

    Started by ldarley‎, 03-27-2017 01:48 PM
    • Replies: 0
    • Views: 639
    03-27-2017, 01:48 PM Go to last post
  2. β and b

    Hi, Just starting with regression analysis but am confused with the interchangeability of β and b. Can someone clarify the difference? Thank...

    Started by stats_challenged‎, 05-11-2015 04:49 AM
    • Replies: 3
    • Views: 2,818
    05-11-2015, 04:31 PM Go to last post
  3. "Adjusting" logistic regression model

    I'm trying to predict response to a direct mail campaign, but there will be multiple campaigns, each having a different "topic" (eg, home remodeling,...

    Started by jawon‎, 02-20-2013 05:43 PM
    • Replies: 2
    • Views: 2,940
    02-20-2013, 06:43 PM Go to last post
  4. "Averaging" linear trends = linear regression slopes ?

    Hello everyone, I was not able to find a solution for the following question, explaining it with a simple example: We have N=12 weather boxes...

    Started by statQuestions‎, 07-27-2014 04:02 PM
    • Replies: 1
    • Views: 1,284
    07-27-2014, 05:18 PM Go to last post
  5. "Best" Multiple (Multivariate) Nonlinear Regression?

    Hi all, I'm just getting started in R. I've had good luck finding the right (predictive) correlation weights using orthogonal polynomials in Java....

    Started by Axl‎, 01-21-2009 05:58 PM
    • Replies: 2
    • Views: 4,143
    01-22-2009, 03:05 PM Go to last post
  6. Question "common" residual SS

    In an effort to understand the ANCOVA analysis on the following link, I have reconstructed the sheet in fig 16.3 ...

    Started by sunnee1‎, 02-17-2014 02:15 PM
    • Replies: 1
    • Views: 1,271
    02-17-2014, 08:08 PM Go to last post
  7. "Lumping" multiple data sets into one for regression

    Closed - moved sub-forums

    Started by reactant‎, 06-26-2015 01:25 PM
    • Replies: 0
    • Views: 1,763
    06-26-2015, 01:25 PM Go to last post
  8. "No Observations"

    Hi, I was hoping someone might be able to help solve this problem. The values are all formatted as numeric. I'm regressing news announcements on...

    Started by CharlesOG‎, 09-13-2010 05:46 AM
    • Replies: 1
    • Views: 2,623
    09-13-2010, 07:57 AM Go to last post
  9. "Sensitivty" analysis

    I have not encountered this before. It occurs in the context of "mixed effects OLS regression" (not sure exactly what type of regression that is...

    Started by noetsi‎, 03-18-2016 01:31 PM
    • Replies: 4
    • Views: 1,621
    03-18-2016, 04:10 PM Go to last post
  10. "two variables are too similar and thus there is no linear interaction found"-Effect?

    Hi there (german verision below) I did a multiple Regression. There are two variables where no linear interactions was found. This is a little...

    Started by MrPeer‎, 06-09-2014 10:45 AM
    • Replies: 3
    • Views: 2,247
    06-09-2014, 01:16 PM Go to last post
  11. 'e' in expected values in Poisson

    Using this example (see below) could someone please tell me what the 'e' symbol stands for and how one would work out the expected values manually. ...

    Started by sarahharding‎, 01-05-2017 11:44 AM
    expected values, poisson distribution, poisson regression, symbols
    • Replies: 1
    • Views: 2,543
    01-05-2017, 02:43 PM Go to last post
  12. 'Key Drivers of Satisfaction Analysis' - Help Please!

    For a project I am undertaking, I have carried out an extensive survey of satisfaction. I have a list of criteria ranked with the level of customer...

    Started by StaisticallyAmateur‎, 07-18-2011 08:28 AM
    • Replies: 0
    • Views: 2,100
    07-18-2011, 08:28 AM Go to last post
  13. 'Significant' product-term interaction but no significant simple main effect contrast

    :wave: I'm conducting a conditional logistic regression to assess the association between a continuous predictor and a dichotomous outcome,...

    Started by Prof.B.‎, 11-25-2013 04:43 PM
    contrasts, interaction, logistic regression, sas
    • Replies: 6
    • Views: 4,285
    11-26-2013, 07:43 PM Go to last post
  14. (Beginner!) Questions about regression on CD album sales/internet use/digital music s

    Hello, I am attempting to perform a regression on what has caused the reduction in CD album sales, and need a little assistance. I have 28 data...

    Started by ontheroadtofindout‎, 03-27-2012 12:07 PM
    • Replies: 1
    • Views: 2,052
    03-29-2012, 09:34 AM Go to last post
  15. (easy) Maximum Likelihood Regression question...

    hello everyone. i am trying to get my head around a very easy example that i read somewhere explaining maximum likelihood estimation on the OLS...

    Started by will22‎, 08-27-2011 11:40 AM
    • Replies: 11
    • Views: 5,189
    08-27-2011, 02:33 PM Go to last post
  16. (easy?) Partial slope coefficients question...

    Slopes from auxiliary regressions where each variable is regressed on one of the others. Variables have all been mean-deviated so the constant terms...

    Started by jesse2‎, 12-15-2011 02:25 PM
    • Replies: 0
    • Views: 2,904
    12-15-2011, 02:25 PM Go to last post
  17. (Li'l) theoretical question about correlations in regression...

    hey y'all people!??! how're y'all doooin' huh? i hope everyone had the most awesomest holidays!!! heh. so... who else is feelin' the pinch this...

    Started by spunky‎, 01-08-2012 02:09 PM
    • Replies: 9
    • Views: 3,308
    01-09-2012, 02:44 AM Go to last post
  18. (OLS) How to get sample variance-covariance matrix of residuals?

    Consider the OLS: (1) y = a + b*x + e Where e is the error term. I understand that the population variance-covariance matrix for the residuals...

    Started by derksheng‎, 07-16-2012 07:00 AM
    • Replies: 6
    • Views: 5,156
    07-16-2012, 10:02 AM Go to last post
  19. (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: 1,871
    03-10-2016, 05:02 PM Go to last post
  20. (SPSS) External validation for a linear regression model

    Hello, I am investigating relationships of continuous variables and I am aiming at getting a model that can be generalized for the study. My DV is...

    Started by wid‎, 01-02-2015 07:32 PM
    • Replies: 6
    • Views: 3,188
    01-06-2015, 06:49 AM Go to last post
  21. (SPSS) Linear Mixed Model?

    Dear all, I would appreciate any advice on the correct use of a Linear Mixed Model (in SPSS) A short description of the research Im doing: In...

    Started by JdH‎, 07-18-2015 07:27 AM
    • Replies: 0
    • Views: 1,271
    07-18-2015, 07:27 AM Go to last post
  22. (SPSS) Multinomial Logistic Regression- testing IIA- Hausman-McFadden

    hi all, I am using SPSS 20 to analyze survey data. I am using Multinomial Logistic Regression and have come up with three "models", containing...

    Started by Syd‎, 02-25-2013 08:26 PM
    iia
    • Replies: 2
    • Views: 7,942
    02-28-2013, 09:08 PM Go to last post
  23. (Urgent!) Overlapping concepts in regression analysis

    Hi all, I have an urgent question regarding my master thesis: I'm doing research on online political participation, which is measured by 12...

    Started by Gerrit‎, 08-11-2013 07:31 AM
    • Replies: 1
    • Views: 1,481
    08-12-2013, 10:11 AM Go to last post
  24. 1 out of 5 predictors is non-linear - can I proceed with OLS estimation?

    Hello dear forum members! My univariate multiple regression model includes 5 predictors + 2 interaction terms. However, examination of the fitted...

    Started by kiton‎, 01-22-2015 12:36 PM
    3 Pages
    1 2 3
    • Replies: 30
    • Views: 6,194
    01-24-2015, 01:58 AM Go to last post
  25. 1 predictor, 2 different values for baseline statistic & change statistic?

    Hi, I am conducting a Cox Regression for my first time. I created a simple model with only 1 predictor (categorical), one dependent variable...

    Started by unipsychologist1‎, 03-12-2012 04:09 PM
    change score, chi-sqaured, cox, survival analysis
    • Replies: 0
    • Views: 2,047
    03-12-2012, 04:09 PM Go to last post
  26. 1)Test multicollinearity b4/after Stepwise Log Regress? 2)Final Equatn 3)Model Select

    Hi all, I need to perform logistic regression for my study. Pretty new to it but have read up on it and have tried it on SPSS. I would like to...

    Started by atomic_beans‎, 07-20-2015 11:49 PM
    logistic regression, model selection, multicollinearity, spss, stepwise
    • Replies: 8
    • Views: 2,322
    07-25-2015, 06:13 AM Go to last post
  27. 10 fold cross-validation

    I am looking at how good an experimental measures is to classify control group from a clinical group. I was asked to do 10-fold cross validation....

    Started by Cathy Carter‎, 12-09-2014 03:14 PM
    • Replies: 0
    • Views: 2,086
    12-09-2014, 03:14 PM Go to last post
  28. 1way anova to do multiple comparisons on dichotomous dv

    Greetings! I wanted to quickly reference with someone who may know more about logistic type analyses. I am doing an analysis of a very large...

    Started by cdo‎, 05-18-2010 05:25 PM
    • Replies: 0
    • Views: 3,389
    05-18-2010, 05:25 PM Go to last post
  29. 2 or 3 level multilevel model? Quick query

    Hi there, The title should read 3 or 4 level multilevel model, my apologies. I am estimating a multilevel model (in Stata). My goal is to...

    Started by StatsQQQ‎, 07-26-2016 12:31 PM
    country, level, multilevel, regression
    • Replies: 1
    • Views: 1,801
    07-26-2016, 07:55 PM Go to last post
  30. 2 or more type of categorical variable with multinomial logistic regression

    Dear sir Good evening from Japan I would like to know about usage of multinomial logistic regression In my analysis have different type of (2...

    Started by yawai‎, 03-14-2017 08:47 AM
    • Replies: 0
    • Views: 883
    03-14-2017, 08:47 AM Go to last post
  31. 2-stage Heckman instrumental variable estimation

    Hi Guys, I am working on my thesis. My main regression model is the following: (1) Y=x1*Payment+x2*Country+x3*Industry..... All independent...

    Started by maxt‎, 03-30-2014 10:34 AM
    endogeneity, heckman, ols, selection bias
    • Replies: 0
    • Views: 2,321
    03-30-2014, 10:34 AM Go to last post
  32. 2-Way ANOVA: Interaction plots show interaction, but term is insignificant?

    Hi, I am doing some 2-way ANOVA analysis and have a slight issue. The interaction plots seem to show there is interaction between the two groups,...

    Started by regression_is_cool‎, 04-20-2012 01:41 PM
    • Replies: 1
    • Views: 2,149
    04-20-2012, 02:08 PM Go to last post
  33. 22 enough for multiple regression?

    Hello guys, i am doing a thesis on a given industry having only 22 enterprises. As the population size is small i have decided to go for census. But...

    Started by gett_u@yahoo.com‎, 11-16-2012 01:40 AM
    • Replies: 5
    • Views: 1,997
    11-20-2012, 02:58 AM Go to last post
  34. 2SLS - endogeneity issue

    I am running a regression on the relationship between aid inflows and investment levels in developing countries. One obvious other explanatory...

    Started by Alex E‎, 05-01-2006 09:37 AM
    • Replies: 1
    • Views: 3,636
    05-06-2006, 01:40 PM Go to last post
  35. 2sls regression

    hi, what be the consequenses of using the same explanatory variables in a simultaneous equations system? for example if both the supply and the...

    Started by bodesmiller‎, 02-15-2015 11:51 AM
    • Replies: 0
    • Views: 1,426
    02-15-2015, 11:51 AM Go to last post
  36. 2SLS regression model

    I have a query about instrumental variable (IV) and 2SLS (actually three stage) regression. I am trying to estimate effect of core team(a group of 5...

    Started by divyajoshi1001‎, 11-17-2013 04:06 PM
    2sls regression mode
    • Replies: 3
    • Views: 1,975
    11-20-2013, 09:41 PM Go to last post
  37. 3 way interaction urgent :(

    Hi I have a question about 3 way interaction. I have two IV: - inside out human resource planning - soft human resource planning the DV is...

    Started by evelien1987‎, 08-06-2010 07:47 AM
    • Replies: 1
    • Views: 2,827
    08-06-2010, 08:12 PM Go to last post
  38. 3-way ANOVA for paired groups and repeated measures or a GEE

    Hi! I need help for data analysis of my masters.I work with awake rats in pharmacology experiments. In my experiment I have some groups of treatment...

    Started by igsimoes‎, 12-17-2016 07:26 AM
    • Replies: 2
    • Views: 2,368
    12-18-2016, 11:01 AM Go to last post
  39. Question 4 DV's in a regression analysis

    I need to conduct a Regression analysis with 2 IV's and 4 DV's, I was wondering if this is something that is possible? I want to test out a model...

    Started by tammy84‎, 07-23-2010 11:00 AM
    • Replies: 0
    • Views: 4,153
    07-23-2010, 11:00 AM Go to last post
  40. 4-way nested Anova?

    A student of mine carried out some research before we thought about how we were going to analyze it, and we're a bit lost. We are trying to...

    Started by kalistys‎, 09-12-2012 09:42 AM
    • Replies: 0
    • Views: 1,523
    09-12-2012, 09:42 AM Go to last post
  41. 4PL Non-Linear Regression, Transforming observed y values

    Good Afternoon, I'm currently teaching my self how to fit response curves, and have run into some trouble. I currently need assistance on...

    Started by BrainExploding‎, 10-21-2013 03:34 PM
    4pl, curve fitting, log transformation, non-linear regression, response curve
    • Replies: 7
    • Views: 5,226
    10-22-2013, 12:33 PM Go to last post
  42. 6 factors and a response

    Hello All, I have a spreadsheet with 6 factors and 1 response... i'm not sure if all the factors effect the response but I'm hoping there is a...

    Started by ilikeshirt‎, 07-04-2014 10:54 AM
    • Replies: 10
    • Views: 2,469
    07-08-2014, 10:52 AM Go to last post
  43. 95% confidence interval linear regression

    Hi everyone, I have perhaps an easy question but I can't deal with it. I use linear regression on my data with 3 dependent variables:...

    Started by HannaMa‎, 07-07-2016 10:37 AM
    • Replies: 0
    • Views: 1,309
    07-07-2016, 10:37 AM Go to last post
  44. 95% confidence intervals for linear regression in excel?

    Hi, I am currently trying to analyse data for my lab experiment and I am having trouble trying to find how to plot individual confidence intervals...

    Started by Paulo1913‎, 03-11-2012 10:42 PM
    • Replies: 1
    • Views: 17,434
    03-26-2012, 11:15 AM Go to last post
  45. 95% Intervals

    I'm new here (and relatively new to statistics) so I apologize if this thread is in the wrong place. I have a problem that seems relatively easy...

    Started by bravo3‎, 02-05-2012 06:10 PM
    confidence intervals, normal distribution, tolerance intervals
    • Replies: 4
    • Views: 2,331
    02-09-2012, 11:31 PM Go to last post
  46. A big problem: Portfolio OLS t-statistic calculation and other P-OLS issues.

    ...............................................

    Started by derksheng‎, 07-23-2012 12:52 PM
    • Replies: 0
    • Views: 1,713
    07-23-2012, 12:52 PM Go to last post
  47. A coefficient to determine Variance

    Hi I am working on a system where temperature stabilises with distance but also increases/ decreases based on month/ hour. Is there a way to...

    Started by PYork‎, 11-09-2015 09:13 AM
    regression, variance
    • Replies: 1
    • Views: 2,644
    11-09-2015, 12:41 PM Go to last post
  48. A good text on generalised linear models?

    Does anyone have any good recommendations on texts on generalised linear models without matrix notation? Cheers.

    Started by .ACS.‎, 03-28-2010 12:17 PM
    • Replies: 2
    • Views: 3,218
    03-28-2010, 03:01 PM Go to last post
  49. A methodology question

    Hi, I have a multiple regression model e.g. y=x1+x2+e Can I estimate the model by using the model in two ways by using same values of y and x1,...

    Started by taltalk‎, 10-05-2012 12:19 PM
    • Replies: 3
    • Views: 992
    10-05-2012, 03:06 PM Go to last post
  50. A new comer has a question about multicollinearty problem

    I am running a OLS model with 9 IVs. The model results are good (a fitting model), but I got a high negative multicollinearity problem for two IVs...

    Started by TanXi‎, 07-23-2011 09:45 AM
    • Replies: 3
    • Views: 2,494
    08-09-2011, 02:51 PM Go to last post
  51. A novice in deep waters

    Hi guys I am in no way a statistical expert 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: 225
    10-26-2017, 11:19 AM Go to last post
  52. Post A priori Power Analysis

    Hey Guys, I am a newbie and have a question on power analysis. I would like to measure the effect of an intervention on various measures and...

    Started by floriisco‎, 08-13-2016 11:02 AM
    hypothesis testing, lmr, power analysis
    • Replies: 2
    • Views: 3,641
    08-15-2016, 04:10 AM Go to last post
  53. A purely conceptual question

    Assume a logisitc regression model includes a continuous variable like age and a categorical variable like gender and an interaction term for these. ...

    Started by gmcbeen‎, 04-12-2016 05:30 PM
    • Replies: 0
    • Views: 1,129
    04-12-2016, 05:30 PM Go to last post
  54. A query related to Bayesian Regression

    I had a query related to Bayesian Regression and I was wondering if someone had any ideas : So in the proper Bayesian case, we have the following...

    Started by ardur‎, 06-22-2011 06:42 PM
    noparse
    • Replies: 0
    • Views: 1,771
    06-22-2011, 06:42 PM Go to last post
  55. A question about bimodality.

    First question - if my Y variable has a bimodal distribution, is it at all possible to run a regression on this variable? Second - if my Y...

    Started by aquietplace‎, 03-29-2008 01:22 PM
    • Replies: 1
    • Views: 2,233
    03-29-2008, 01:24 PM Go to last post
  56. a question about estimates in mixed models

    Hello, I was hoping to be able to find all of the estimates of covariates and of the categories with a number of factors. I found a similar study...

    Started by Dragonwalker‎, 03-28-2012 12:55 AM
    • Replies: 0
    • Views: 1,401
    03-28-2012, 12:55 AM Go to last post
  57. A question about OR

    Hello everybody I have a question about interpretation of OR in logistic regression. My result is like this: Dependent variable is satisfaction...

    Started by badibad‎, 05-21-2014 06:24 AM
    2 Pages
    1 2
    • Replies: 19
    • Views: 4,742
    05-25-2014, 02:58 AM Go to last post
  58. A question regarding missing variables

    Hey all, If you have missing values in your data set, how do you go about doing the statistical analysis? For example if you have a data chart...

    Started by moomoo345‎, 02-20-2010 06:57 PM
    • Replies: 2
    • Views: 2,430
    02-20-2010, 10:14 PM Go to last post
  59. A question regarding simultaneous relationship and its implications on predictions

    Hey guys, I have a question regarding The simultaneous relationships and the Implications it has on regarding whether the said variable will be...

    Started by orenz10‎, 04-14-2017 08:22 AM
    • Replies: 0
    • Views: 573
    04-14-2017, 08:22 AM Go to last post
  60. A quick regression QUESTION

    Hi i just have a really simple question regarding multiple regression. i have a independant variable called DPR that is the dividend payout ratio...

    Started by pad1w07@soton.ac.uk‎, 09-15-2008 12:06 PM
    • Replies: 2
    • Views: 2,893
    09-16-2008, 03:10 AM Go to last post

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