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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Post Help with regression and related nominal values

    Hey all. I'd like some input on a regression analysis. I have data that measures the reactions of individuals to a number of objects and to a number...

    Started by infiniteline‎, 10-15-2016 12:35 PM
    multivariate, nominal variable, regression analysis
    • Replies: 5
    • Views: 1,199
    10-20-2016, 10:25 AM Go to last post
  2. General guidance on interpreting residuals and diagnostics for linear regressions

    Now that I'm more comfortable with regression (in SAS) and understand the assumptions needed for linear regression, I'm able to run simple models of...

    Started by semidevil‎, 06-13-2016 11:00 AM
    • Replies: 5
    • Views: 2,061
    06-14-2016, 07:18 AM Go to last post
  3. Can someone help me interpret this data?

    I'm performing multiple regression for an international relations thesis regarding various predictor variables and the outcome of intervention in...

    Started by datorres85‎, 06-18-2016 09:01 PM
    • Replies: 5
    • Views: 1,142
    06-19-2016, 06:58 PM Go to last post
  4. Change regression model ($x^*_i = x_i -10$)

    Hi there.:wave: I'm solving an exercise on multiple linear regression. Near the end I will be asked for the same data as the previous model, it is...

    Started by valentina89‎, 06-23-2016 04:53 PM
    parameter estimation, regression model
    • Replies: 5
    • Views: 2,351
    06-26-2016, 04:18 AM Go to last post
  5. Compare the estimated model with the model with intercept-only

    The question is: How do the test to compare the estimated model with the model with intercept-only ? How can I comment on the result ? I think we...

    Started by valentina89‎, 06-25-2016 06:40 AM
    logit regression, regresion, test statistic
    • Replies: 5
    • Views: 2,285
    06-26-2016, 12:08 PM Go to last post
  6. Comparing regression coefficients between groups

    Hello! I am a psychology student and Im doing a research which I need help with. The research is about parenting stress in parents of children...

    Started by Mila‎, 07-01-2016 08:09 AM
    regression coefficients
    • Replies: 5
    • Views: 2,659
    07-01-2016, 03:10 PM Go to last post
  7. Event probabilities from the regression analysis

    Hi, I am looking for all possible sources (literature, articles, books) with descriptions how to transform different kinds of regression analysis...

    Started by Vlajkony‎, 07-15-2016 04:55 AM
    event probabilities, probabilities, regression analysis, transformations
    • Replies: 5
    • Views: 1,638
    07-15-2016, 09:55 PM Go to last post
  8. Exclamation please help : modelization

    Hello, I have a distribution which looks like a Khi-2 distribution, which model is most appropriate? I try linear regression, but normal...

    Started by elle1301‎, 07-21-2016 04:14 AM
    khi-2, regression
    • Replies: 5
    • Views: 1,743
    07-22-2016, 03:13 AM Go to last post
  9. Detecting fake results

    Hello everyone, I am currently working together with a fellow student on analyzing what factors affect profitability in banking, by using a...

    Started by Eina‎, 08-19-2016 12:07 PM
    • Replies: 5
    • Views: 1,528
    08-19-2016, 03:40 PM Go to last post
  10. VIF issues

    Good afternoon, I ran a hierarchical regression model, (main effects in step 1, two-way in step 2 and three-way in step 3). My VIF in step 1 are...

    Started by Julie26‎, 09-03-2016 06:24 PM
    • Replies: 5
    • Views: 1,918
    09-05-2016, 09:16 AM Go to last post
  11. Regression after multiple imputation

    Hello every one. I want to perform simple binary logistic regression after multiple imputation but I constantly get this message and the execution of...

    Started by johnstatistic‎, 10-05-2016 09:32 PM
    multiple imputations, regression analysis
    • Replies: 5
    • Views: 1,426
    10-10-2016, 07:45 PM Go to last post
  12. Generalized Least Squares (and ANOVA type III)

    Dear all, I ran a type III ANOVA on a model of this kind: gls(y~x1+x2+x3). I found that both x2 and x3 are significant. However, if I drop x3 from...

    Started by sff.cardoso‎, 09-21-2016 02:07 PM
    anova, gls, regression analysis
    • Replies: 5
    • Views: 1,036
    09-22-2016, 01:07 PM Go to last post
  13. Not significant coefficients in Logit, but in Probit they are

    Hello, I would like to ask you for a help. I have a simple model with one explanatory variable and with a binary dependend variable. Explanatory...

    Started by tradermartin‎, 09-24-2016 02:48 AM
    • Replies: 5
    • Views: 1,952
    09-26-2016, 05:40 PM Go to last post
  14. Standard Regression Analysis / urgent help for stats beginner.

    Hi Guys! I'm fairly new to statistics and am conducting a standard regression analysis with 1 predictor variable ( following from a pearsons...

    Started by Valeriosmith‎, 11-22-2016 06:50 AM
    • Replies: 5
    • Views: 2,973
    11-22-2016, 12:57 PM Go to last post
  15. log transformations

    This has confused me for years. Commonly in financial analysis you log Y or sometimes an X. I have never been sure if when you log Y you have to...

    Started by noetsi‎, 03-20-2017 02:22 PM
    • Replies: 5
    • Views: 971
    03-20-2017, 03:08 PM Go to last post
  16. Robust Regression v. Transformation of Variable (or both?)

    Hello everyone, I have a question about a regression I am running. I believe it's a pretty basic question, although after a couple hours...

    Started by kramer1788‎, 03-09-2017 11:01 PM
    heteroskedasticity, robust standard errors, transformations
    • Replies: 5
    • Views: 1,300
    03-13-2017, 10:30 AM Go to last post
  17. The bootstrap method for medical modelling

    I am part of a team creating a model for paediatric hospitalised patients and would appreciate some help. We are looking to produce an accurate...

    Started by Lindsey‎, 02-27-2017 06:05 PM
    bootstrap, bootstrapping, model
    • Replies: 5
    • Views: 2,462
    03-04-2017, 10:01 PM Go to last post
  18. 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: 509
    08-13-2017, 05:27 AM Go to last post
  19. 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: 353
    08-25-2017, 09:19 AM Go to last post
  20. Data pooling and regression analysis

    Dear All I have a question about data pooling and regression analysis, i have tried to read some basic statistic book, but still not answering my...

    Started by mchoud‎, 02-21-2006 10:48 AM
    • Replies: 4
    • Views: 5,374
    02-21-2006, 12:15 PM Go to last post
  21. Multiple regression?

    Hi, I'm wondering if it is a bad violation to try to conduct a multiple regression analysis if some of the variables are non-parametric? My...

    Started by Mimi Le Rue‎, 04-11-2006 11:00 AM
    • Replies: 4
    • Views: 4,091
    04-13-2006, 09:59 AM Go to last post
  22. Unsure of which test to use!

    If I want to assess the effects of a number of different factors such as sex, income etc on exam results which statistical test should I use? I have...

    Started by jagsman‎, 05-04-2006 08:01 PM
    • Replies: 4
    • Views: 2,544
    05-06-2006, 01:42 PM Go to last post
  23. Weightings Problem

    I have been given an EXCEL model and my assigned task is (only) to fix it for problems that I might call "unintended consequences" of the underlying...

    Started by deanalt‎, 07-16-2007 09:32 PM
    • Replies: 4
    • Views: 2,976
    07-19-2007, 02:33 PM Go to last post
  24. Combining Prediction Intervals

    I'm having trouble finding how to combine a number of prediction intervals. The best way to explain the problem is: Imagine a race with 4 relay...

    Started by Rob‎, 11-16-2007 11:13 AM
    • Replies: 4
    • Views: 7,871
    07-22-2010, 04:12 PM Go to last post
  25. What's a logistic regression?

    Hello, in college we learned multiple regression techniques (different models: linear, log-lin, lin-log, exponential, ...) - including all the...

    Started by Analytics‎, 12-24-2007 05:34 PM
    • Replies: 4
    • Views: 5,782
    12-30-2007, 05:45 PM Go to last post
  26. Question Can "infinite" values be used in regression?

    Hello, I am analyzing a series of plots along a recovery gradient, using "time since disturbance" as a continuous variable. I want to see how...

    Started by GiganD‎, 04-03-2008 03:21 PM
    • Replies: 4
    • Views: 4,281
    04-07-2008, 01:50 PM Go to last post
  27. Damage Assessment

    I apologize for this question being exceedingly vague, but I'm not sure of the correct terminology. After running a regression analysis, I have...

    Started by DCohen‎, 05-23-2008 03:17 PM
    • Replies: 4
    • Views: 3,065
    05-25-2008, 09:07 AM Go to last post
  28. Multiple Regression

    Hi, I am doing regression for dependent variable Y and independent variables X1, X2, X3 and X4. Y is the weekly stock price of a company which...

    Started by a_quantum‎, 08-04-2008 03:00 AM
    • Replies: 4
    • Views: 2,622
    08-06-2008, 03:39 AM Go to last post
  29. Statistics Help (Invoice Question)

    Please help! The manager of the purchasing department of a large banking organization would like to develop a model to predict the amount of time...

    Started by student00‎, 08-12-2008 02:55 PM
    • Replies: 4
    • Views: 5,784
    08-13-2008, 08:05 PM Go to last post
  30. 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: 6,937
    08-17-2008, 12:49 PM Go to last post
  31. Three way interactions in regression

    Hi, I'm trying to figure out how to do three-way interactions with multiple regression. I am trying to predict an IV by a three DVs and the...

    Started by sifar16‎, 08-28-2008 03:18 AM
    • Replies: 4
    • Views: 22,098
    03-20-2009, 11:49 PM Go to last post
  32. Question Multiple Regression & Multiple Linear Regression: 2 Qu's

    I know these are 2 very basic question, but if someone could please confirm them for me I'd be very grateful indeed: 1. Am I correct in thinking...

    Started by gemma7‎, 08-31-2008 08:49 AM
    • Replies: 4
    • Views: 13,381
    12-05-2008, 03:40 PM Go to last post
  33. Standard Deviation or Response / Prediction - Linear Regression

    Hi, I'm hoping someone out there can help me with what is probably a very simple question. For a stats assignment, I've created a linear...

    Started by dzeni‎, 10-05-2008 06:28 PM
    • Replies: 4
    • Views: 11,535
    10-20-2008, 04:47 AM Go to last post
  34. Stats analysis help would be very much appreciated

    I have carried out some research. The research involved respondents filling in a questionnaire of 62 questions. Answers were on a scale - Strongly...

    Started by oakmoss‎, 01-18-2009 09:32 AM
    • Replies: 4
    • Views: 3,141
    01-20-2009, 06:33 AM Go to last post
  35. Beta coefficients in multiple regression

    Hi guys. I have a question about beta coefficients that are calculated for standard multiple linear regression procedure. I kind of don't...

    Started by kobylkinks‎, 01-30-2009 04:02 AM
    • Replies: 4
    • Views: 21,899
    10-06-2009, 09:35 AM Go to last post
  36. three way interactions and centering in multiple regression

    Hello, I am examining three variables to see whether they interact with each other to predict my DV using multiple regression. I typically center my...

    Started by psychologygirl‎, 02-14-2009 10:07 PM
    • Replies: 4
    • Views: 4,593
    02-16-2009, 08:43 PM Go to last post
  37. Linear Regression in Excel...

    Hello everyone ! If you don't mind, a question regarding linear regression in Excel. I will be having a an Intro to Statistics test in May and...

    Started by Fred‎, 02-26-2009 11:08 AM
    • Replies: 4
    • Views: 4,796
    02-26-2009, 11:57 AM Go to last post
  38. Linear Regression Models (3)

    β ε note: also under discussion in "Math Help Forum"

    Started by kingwinner‎, 05-14-2009 04:43 AM
    • Replies: 4
    • Views: 3,275
    05-19-2009, 08:03 PM Go to last post
  39. Linear Regression: reversing the roles of X and Y

    Simple linear regression: Y = β0 + β1 *X + ε , where ε is random error Fitted (predicted) value of Y for each X is: ^ Y = b0 + b1 *X (e.g....

    Started by kingwinner‎, 05-25-2009 03:23 AM
    • Replies: 4
    • Views: 16,635
    05-27-2009, 10:39 AM Go to last post
  40. Question Help a programmer with very simple Linear Regression (ordinary least squares?)

    Hi everyone, I'm a programmer, so I don't have much understanding of statistics. But I am supposed to write a program for my company that...

    Started by jamescox‎, 10-08-2009 04:02 PM
    • Replies: 4
    • Views: 2,888
    07-26-2010, 07:27 AM Go to last post
  41. scale issues

    Please look at the following descriptive labels for a scale of importance. Extremely critical (7) Highly important (6) Very Important (5) ...

    Started by Dr.Appalayya‎, 10-17-2009 04:53 AM
    • Replies: 4
    • Views: 2,644
    10-19-2009, 08:11 AM Go to last post
  42. Hpw to Determine the Hypotheses for a T-test Study?

    delete thread mods please. thanks.

    Started by SoLost‎, 11-28-2009 04:13 AM
    • Replies: 4
    • Views: 4,575
    11-29-2009, 12:04 AM Go to last post
  43. very quick question about the 'intercept'

    If I am asked to state the intercept which one do I quote? Estimate, Std error, t value or Pr(>|t|) ? (If it makes any difference I am doing a...

    Started by misc763‎, 12-03-2009 03:47 PM
    • Replies: 4
    • Views: 3,810
    12-03-2009, 04:47 PM Go to last post
  44. What is the history of regression analysis?

    Hi all, Recently, I am using regression analysis to do a geophysics study. Now the study is almost done. I start to write my report. I want to add...

    Started by ygao‎, 01-11-2010 04:40 PM
    • Replies: 4
    • Views: 12,319
    01-12-2010, 12:22 PM Go to last post
  45. Linear Regression Underestimating Sales Forecast

    Guys, I want to share a flawed method i've been dealing with. I am currently using linear regression to find the coefficent of Year-over-year...

    Started by rwd5013‎, 05-27-2010 07:59 PM
    • Replies: 4
    • Views: 5,010
    05-28-2010, 07:59 AM Go to last post
  46. How many data points needed before a nonlinear regression model can be performed?

    With a within-subject design of only one independent variable, I'm wondering how many data points (levels of the indept variable along X axis) do I...

    Started by metric‎, 08-09-2010 01:52 PM
    • Replies: 4
    • Views: 8,988
    08-09-2010, 03:29 PM Go to last post
  47. problem with independent variables

    Hello, I need your advice. I have a data file, with a binary dependent variable and some independent ones. For each person (case), there were 3...

    Started by WeeG‎, 08-19-2010 04:26 AM
    • Replies: 4
    • Views: 4,159
    08-20-2010, 09:12 PM Go to last post
  48. Question Regression Analysis Help

    Hi All, first post here, glad to be part of this forum. After surveying my population, I am currently experimenting what factors (about 10...

    Started by MohammedT‎, 09-04-2010 12:53 PM
    • Replies: 4
    • Views: 2,983
    09-04-2010, 04:36 PM Go to last post
  49. Need help badly!

    You have the ramp-servicing contract for a midsize car wash. For wash workers you use predominantly part time workers, all of whom have sufficient...

    Started by charterpilot‎, 09-08-2010 10:46 PM
    • Replies: 4
    • Views: 4,549
    09-09-2010, 03:49 PM Go to last post
  50. Descriptive research and regression analysis?

    Please pardon my ignorance...can I use multiple regression analysis in a descriptive research design to answer my hypotheses? If not, can anyone...

    Started by reakhavok‎, 09-18-2010 01:53 PM
    • Replies: 4
    • Views: 8,422
    09-19-2010, 01:11 PM Go to last post
  51. Logistic regression with dependent variables

    Dear All I'm trying to perform logistic regression to determine risk factors for retinopathy of prematurity (ROP). The outcome is binary 1=...

    Started by SiBorg‎, 10-02-2010 04:47 AM
    • Replies: 4
    • Views: 5,793
    10-06-2010, 06:35 PM Go to last post
  52. Need some help with multiple regression

    Hi guys. For my project i need to to a regression with a bunch of data I've gathered. I have 7 variables and i did the regression in excel and got...

    Started by c2q‎, 11-02-2010 10:40 PM
    • Replies: 4
    • Views: 2,184
    11-03-2010, 03:28 AM Go to last post
  53. Arrow How to deal with the dependent predictors in the regression ?

    My data have some high correlated predictors, so it fit worse in the linear regression. what regression methods are proposed to solve this...

    Started by purple‎, 11-03-2010 01:39 PM
    • Replies: 4
    • Views: 3,481
    11-04-2010, 11:18 AM Go to last post
  54. multiple regression

    Hi , i have three variables for the question below.For each scenarios that is gulf view houses and no gulf view houses. The variables are sale...

    Started by SadieKhan‎, 11-09-2010 06:12 PM
    • Replies: 4
    • Views: 8,550
    11-10-2010, 01:06 AM Go to last post
  55. Estimation method for ratio dependent variable?

    Hi, Logistic regression is used if the dependent variable is a discrete choice variable. My dependent variable is not a discrete choice variable,...

    Started by gabeo‎, 11-10-2010 02:37 AM
    • Replies: 4
    • Views: 11,541
    11-12-2010, 05:30 AM Go to last post
  56. 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: 2,792
    11-23-2010, 12:03 PM Go to last post
  57. Desperately Need Help with Regression Analysis..Please :)

    hello :) I'm new here (and in doing statistics in general). I have to do a regression analysis on panel data (10 groups, 9 years - 90...

    Started by jayde‎, 01-20-2011 04:03 AM
    multiyear data
    • Replies: 4
    • Views: 3,490
    01-20-2011, 11:17 AM Go to last post
  58. Moved: single observation multi-year variables

    Started by tomatowill03‎, 02-13-2011 10:10 AM
    • Replies: -
    • Views: -
    02-13-2011, 10:10 AM Go to last post
  59. Simple command in SAS for regression with a large number of covariates?

    I'm a new poster and I searched before creating this thread, so I hope I'm not raising a common question that is constantly being answered here. ...

    Started by Janus‎, 03-01-2011 10:54 PM
    • Replies: 4
    • Views: 4,327
    03-02-2011, 04:25 PM Go to last post
  60. Solve for the following values

    I need to solve for a,b,c,d by hand showing calculations but I can't seem to find any equations that will help me here. We haven't been given any...

    Started by crusoe‎, 03-10-2011 07:33 PM
    • Replies: 4
    • Views: 2,601
    03-11-2011, 01:50 PM Go to last post

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