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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Question Logistic regression logit or cloglog?

    Hi folks,:wave: currently I'm performing a logistic regression and I'm not sure which link function I should use. I have a binary response...

    Started by breez86‎, 10-04-2012 01:11 PM
    • Replies: 3
    • Views: 18,111
    12-03-2012, 01:37 PM Go to last post
  2. Multivariate linear regression analysis (multiple dependent variable, one independent

    I am trying to determine the reason why(and how many) people with health insurance do not fully use all of its benefits(like free flu vaccines). I am...

    Started by p_s‎, 08-03-2014 11:18 PM
    6 Pages
    1 2 3 ... 6
    • Replies: 75
    • Views: 18,092
    09-21-2014, 06:00 AM Go to last post
  3. Use of Intercept Term in OLS Regression

    When is it appropriate to exclude the intercept term from a standard OLS regression? The dependent variable is Sales (of a particular product) and...

    Started by GLHartland‎, 06-07-2011 11:05 PM
    • Replies: 11
    • Views: 17,924
    03-10-2014, 03:19 PM Go to last post
  4. Regression vs ANOVA

    How would you determine whether to use ANOVA or multiple regression? What about the data or the situation of a research topic would be the deciding...

    Started by Diane‎, 11-25-2005 07:48 PM
    • Replies: 1
    • Views: 17,708
    11-25-2005, 08:41 PM Go to last post
  5. Constant Variable

    Hi folks, I was wondering if you could help me understand a problem I have with a regression. Basically, SPSS excludes one of my variables...

    Started by blastStu‎, 09-13-2010 03:58 AM
    • Replies: 2
    • Views: 17,593
    09-13-2010, 12:38 PM Go to last post
  6. Meaning of T-Ratio and parameter standard error in HLM analysis

    Hello. I've recently used an Hierachical Linear Modeling (HLM aka mixed modeling) analysis method to look at some data. I'm only just beginning to...

    Started by jonblazn‎, 07-31-2008 11:38 AM
    • Replies: 2
    • Views: 17,413
    08-02-2008, 10:34 PM Go to last post
  7. Regression in First and Second Differences

    I am running a regression in STATA to determine if temperature effects natural gas production in Russia and I am including the following variables...

    Started by lxh5027‎, 03-21-2011 10:23 PM
    dfuller, first difference, regression, second difference
    • Replies: 3
    • Views: 17,005
    03-22-2011, 05:45 PM Go to last post
  8. Question Graphically check linearity in logit regression

    Hi all, I am running a logit regression where the outcome variable is binary. I am interested in checking, graphically, whether the relationship...

    Started by Phaedrus‎, 07-21-2014 07:50 AM
    2 Pages
    1 2
    • Replies: 24
    • Views: 16,989
    04-19-2016, 10:59 AM Go to last post
  9. Stepwise multiple regression (spss gives warning that no variables were entered)

    Hello everyone, Help! Help!!!!!! I need help for stepwise multiple linear regression I'm performing with spss version 21. I have tried several...

    Started by Kasco‎, 04-16-2013 04:15 AM
    • Replies: 5
    • Views: 16,944
    04-16-2013, 05:54 AM Go to last post
  10. Mallows Cp selection

    I am using the best subsets method in Minitab to select the best parameters for a multiple regression, but I'm a bit confused on Mallows Cp. Some...

    Started by adama‎, 03-31-2012 02:51 PM
    mallows cp, multiple regression, regression
    • Replies: 3
    • Views: 16,679
    04-01-2012, 02:13 PM Go to last post
  11. Unhappy assumption of independence

    Why is it important that cases are independent in regression (especially, logistic regression)? By "independent" i mean that observations under...

    Started by reductico‎, 06-09-2010 09:35 AM
    • Replies: 5
    • Views: 16,653
    06-09-2010, 02:04 PM Go to last post
  12. 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: 16,601
    03-26-2012, 11:15 AM Go to last post
  13. 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: 16,564
    05-27-2009, 10:39 AM Go to last post
  14. How Does One Interpret Interactions in Logistic Regression Using SPSS?

    Hello Everyone, I am definitely not stats saavy and have been able to run a logistic regression with the help of a manual. The manual doesn't...

    Started by Student T‎, 03-04-2013 10:50 PM
    • Replies: 4
    • Views: 16,498
    03-10-2013, 09:39 AM Go to last post
  15. Post Logistic Regression: To dummy code or not to? Which backward elimination to use?

    I have 10 binary dependent variables (disease prevalence: yes/no, 1/0). I want to do a logistical regression with each of them with the following...

    Started by Daedalus‎, 02-21-2013 12:13 PM
    backward elimination, binary variables, dummy coding, logistical regresion
    • Replies: 5
    • Views: 16,392
    02-22-2013, 11:13 AM Go to last post
  16. Overall significance test of a multiple regression...

    Hey all, I've been puzzling over this for some hours and I've tried many various methods from various text books, I think I must be missing...

    Started by ryanjones102‎, 05-19-2010 08:44 PM
    • Replies: 1
    • Views: 16,389
    05-20-2010, 11:22 AM Go to last post
  17. stepwise regression with dummy variables

    Hello there, I want to do a stepwise regression in order to find relevant predicting variables, but one of the possible predicting variables is a...

    Started by gilisegall‎, 07-11-2011 01:51 PM
    • Replies: 6
    • Views: 16,308
    07-12-2011, 09:00 AM Go to last post
  18. Factor analysis with non-normal distribution?

    Hi all, Does anyone know an alternative to factor anlysis for non-normal distrbutions which explores factors or clusters on a set of 64...

    Started by Wiggy‎, 11-06-2008 05:59 AM
    • Replies: 3
    • Views: 16,298
    11-06-2008, 02:26 PM Go to last post
  19. Arrow Multiple Linear Regression: How to Calculate the Coefficient

    This post has been deleted.

    Started by Draze‎, 02-02-2010 08:56 AM
    • Replies: 3
    • Views: 16,188
    02-08-2010, 12:03 PM Go to last post
  20. Problem with Data analysis on Likert Scale!

    Hello John, Im a student of Business studies and am working on a research project titled as "Impact of Physical environment on Employee...

    Started by Asma Gm‎, 03-26-2008 05:56 AM
    • Replies: 10
    • Views: 16,156
    07-09-2016, 03:44 AM Go to last post
  21. R^2 vs AIC paradox?

    Hi Everyone, I have the following situation which has me a bit puzzled. I've fitted two different linear models to a data set and would like to...

    Started by alfredman‎, 03-28-2011 07:07 AM
    • Replies: 13
    • Views: 16,142
    04-07-2011, 11:10 PM Go to last post
  22. Comparing regression slope intercepts in SPSS

    Hello, my name is Robert Hall and I have got myself in a bit of a pickle with my 3rd year research project. For my project I am looking at the...

    Started by rh241‎, 04-07-2012 02:43 PM
    • Replies: 4
    • Views: 16,004
    07-09-2012, 11:39 AM Go to last post
  23. Univariate Logistic Regression - how to performe

    Hello, I wonder how to perform Univariate Logistic Regression analysis in SPSS. Tested variables are dichotomized and predictors are ordinal and...

    Started by badibad‎, 12-17-2013 01:16 PM
    • Replies: 14
    • Views: 15,783
    12-29-2013, 02:19 PM Go to last post
  24. Interpretation of Loglinear model

    Hi All, I am performing a regression analysis through a log linear model. But I am not able to effectively interpret the coefficient of the...

    Started by sach_83‎, 04-09-2011 05:43 PM
    • Replies: 2
    • Views: 15,634
    04-10-2011, 01:17 AM Go to last post
  25. Coefficient of determination and statistical significance

    Hi, I tried two different models for a regression (both with one predictor). The first one was a linear regression model of the type Y= a + bX...

    Started by val92‎, 02-15-2011 05:24 PM
    • Replies: 6
    • Views: 15,316
    02-16-2011, 01:49 PM Go to last post
  26. Regression Model is not full rank

    Hi all, I am trying to detect relationship of crop yield at the end of the growing seasson (1 dependent variable) using amount of precipitation in...

    Started by szm‎, 11-19-2012 12:18 PM
    full rank, multicollinearity, p-value, problem, regression
    • Replies: 3
    • Views: 15,248
    02-06-2015, 03:08 AM Go to last post
  27. non-integers in poisson GLM

    Great forums, thank you to everyone who contributes to them. My question is regarding non-integer values from some data I collected on parrots...

    Started by lucy‎, 12-30-2011 12:45 PM
    • Replies: 7
    • Views: 15,143
    12-30-2011, 01:11 PM Go to last post
  28. Multicollinearity and AIC in stepwise regression

    I am trying to run a stepwise regression with backward elimination on a set of water chemistry data in which there's a high degree of...

    Started by l3a9k‎, 06-14-2011 02:40 PM
    • Replies: 12
    • Views: 15,127
    07-09-2011, 11:57 AM Go to last post
  29. [SPSS] Multivariable logistic regression - how to transform to achieve linearity?

    Hi, I am doing a project to identify variables that can predict rehospitalisations. There are a few categorical and continuous variables that I...

    Started by Odd90‎, 07-20-2013 05:28 PM
    2 Pages
    1 2
    • Replies: 15
    • Views: 14,648
    08-12-2013, 07:05 PM Go to last post
  30. Interpreting a moderation effect

    Yesterday I submitted my firts thread but I learnt that it was too vague. I did my work but now I have some doubts interpreting a moderation effect....

    Started by Mariana Ramos‎, 04-29-2009 11:37 AM
    • Replies: 3
    • Views: 14,249
    05-07-2009, 01:50 AM Go to last post
  31. Likert Scale Regression Analysis

    I want to perform a regression on some likert scale data. Basically its a scale which measures propensity for participative management. The rationale...

    Started by andrewol‎, 08-12-2013 03:01 PM
    • Replies: 7
    • Views: 14,249
    08-13-2013, 04:09 PM Go to last post
  32. back-transformation of logit-transformed behavioral data

    Hello, I am posting with hopes that someone can assist me in making sure that I am back-transforming my data correctly. I have behavioral data...

    Started by rtoaff‎, 01-29-2012 02:27 AM
    • Replies: 12
    • Views: 14,104
    01-31-2012, 02:15 AM Go to last post
  33. Standard Error of Coefficients in Multiple Regression

    Hi, I have built a model in Excel to do Multiple Regression. I am able to correctly calculate the intercept and the regression coefficients but I...

    Started by JoeA838‎, 10-26-2009 02:08 PM
    • Replies: 1
    • Views: 14,011
    10-26-2009, 02:49 PM Go to last post
  34. Possible to analyze cross lag panel data with regression alone (no SEM)?

    I have 2 (soon to be 4) waves of panel data. I have a relatively small sample size so I don't think I should use SEM - also I don't really...

    Started by sm34833‎, 03-12-2012 06:21 PM
    panel data, regression, structural equation model
    • Replies: 7
    • Views: 13,978
    03-14-2012, 10:57 AM Go to last post
  35. Question Calculating prediction intervals (error estimates of specific predicted points) in a

    Hi all, this is my first post here so please let me know if I need to provide more details. I want to generate a multivariate logistic regression...

    Started by bernoulli‎, 06-18-2010 03:48 PM
    • Replies: 6
    • Views: 13,973
    06-22-2010, 01:01 AM Go to last post
  36. Multiple regression with SPSS

    Hi All, I have done multiple regression in SPSS with three different methods, namely, FORWARD, BACKWARD and STEPWISE. Final outcome is...

    Started by sach_83‎, 12-29-2010 03:55 AM
    • Replies: 2
    • Views: 13,958
    01-01-2011, 01:39 PM Go to last post
  37. Nested ANOVA - Replication vs. Pseudoreplication - pulling hair out, please help

    Hello all, I am trying to run a nested ANOVA in JMP on some ecological field data - I'm trying to measure whether fish biomass is different in...

    Started by vogtro‎, 02-10-2012 08:09 PM
    3 Pages
    1 2 3
    • Replies: 30
    • Views: 13,813
    02-15-2012, 12:22 AM Go to last post
  38. Variance inflation and interactions between variables?

    Hello everyone I am having trouble interpreting some of my results. I am using logistic regression to infer a model based on measured data....

    Started by enur‎, 08-03-2012 09:54 AM
    categorical data, gvif, interaction terms, logistic regression, vif
    • Replies: 8
    • Views: 13,738
    01-05-2015, 01:34 PM Go to last post
  39. Cool Linear regression assumptions not met, now what?!

    Hi, I tried and tried but I could not meet the assumptions for linear regression (normal, linearity, independence, etc.). I have multiple...

    Started by Toulouse‎, 12-17-2009 07:32 PM
    • Replies: 5
    • Views: 13,684
    12-19-2009, 01:54 PM Go to last post
  40. Low R-squared, but my variables fit expectations

    So I ran a regression on 3 different sets of data estimation techniques versus actual survey data. The dependent variable was the non-survey...

    Started by dontpunkme‎, 09-10-2010 09:40 PM
    • Replies: 1
    • Views: 13,660
    09-16-2010, 10:55 AM Go to last post
  41. Thumbs up First difference regression - how to interpret coefficients?

    Hi there, I am planning to apply first difference regression in order to account for time (2 time points). I was wondering what will be the...

    Started by SylviaS‎, 08-21-2013 01:28 PM
    • Replies: 3
    • Views: 13,616
    08-21-2013, 03:38 PM Go to last post
  42. How to prove E(SSE)=(n-2)singma^2 ???

    I'd like to know to how to prove E(SSE)=(n-2)singma^2 (SSE=Syy-BetaHat1*Sxy) . Ive been workin' on it for many days but still cant figure it out....

    Started by jamerse‎, 01-18-2012 04:17 AM
    • Replies: 4
    • Views: 13,603
    01-19-2012, 10:44 AM Go to last post
  43. P-value in regression analysis

    How much should a p-value in a regression model be for the related variable to be considered insignificant?

    Started by X-Offender‎, 12-15-2011 10:04 AM
    • Replies: 6
    • Views: 13,590
    12-25-2011, 02:33 PM Go to last post
  44. Interpreting SAS Output for Regression

    Hi-- I am a complete newbie to statistics, so please talk to me as though I am a six year old child when you are explaining things to me :) I had...

    Started by SophiePaquin‎, 03-10-2013 11:45 PM
    • Replies: 4
    • Views: 13,585
    03-12-2013, 12:12 PM Go to last post
  45. Independent variables correlate to each other: violation of regression assumoptions?

    Ok, so bear with me - total statistical idiot here, in way over his head. I'm running multiple regressions of plant cover against precipitation,...

    Started by Charlie‎, 11-13-2008 03:37 PM
    • Replies: 11
    • Views: 13,580
    11-19-2008, 10:17 AM Go to last post
  46. Cross validation in SPSS

    Hi, I need to conduct cross validation of my data to check for predictive validity. This is what I did so far. I divided the sample into two...

    Started by milehigh899‎, 06-10-2013 08:34 AM
    • Replies: 6
    • Views: 13,559
    06-19-2013, 03:34 AM Go to last post
  47. Polynomial Regression interpretation

    I have 2 questions that I need help interpreting: 1. Y = 47.31051 + 1.06914(X) - .01383(X^2) Because X is used twice (and one of them is a...

    Started by lancearmstrong1313‎, 01-23-2012 10:43 AM
    • Replies: 2
    • Views: 13,389
    01-23-2012, 12:16 PM Go to last post
  48. 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: 13,295
    12-05-2008, 03:40 PM Go to last post
  49. Cutoff points in logistic regression

    One of the articles I am reading now makes reccomendations for changing the cuttoff point used in predicting whether Y=1 or 0. My question is, since...

    Started by noetsi‎, 07-05-2013 12:34 PM
    • Replies: 6
    • Views: 13,287
    03-27-2014, 08:17 AM Go to last post
  50. Moderation graphs

    Hi all, (I hope I'm posting this in the right sub-forum) I have two data sets for which I've done hierarchical regression analysis to test for...

    Started by darc‎, 09-02-2009 06:10 AM
    • Replies: 0
    • Views: 13,196
    09-02-2009, 06:10 AM Go to last post
  51. Find expected value and variance of ARMA(1,1) model

    My apologies if this isn't the correct subforum to ask this question. Here's the model: y_{t}=50+ 0.8y_{t-1} + a_{t} - 0.2a_{t-1} How do I...

    Started by downthesun01‎, 04-25-2011 06:13 PM
    • Replies: 3
    • Views: 13,186
    04-27-2011, 02:11 AM Go to last post
  52. Question Logistic Regression: Include constant in the model or not?

    Hi! 1. Could anybody give me a detailed explanation about why is inappropriate not to use a constant in a logistic regression model? Could you...

    Started by neuroscientist‎, 06-11-2012 09:22 PM
    • Replies: 5
    • Views: 13,097
    06-12-2012, 06:08 AM Go to last post

    Hi guys, I have a small question. I ran a MANOVA model, with 4 DV's and 1 IV with 2 categories. I got a non significant result, with P. Value of...

    Started by WeeG‎, 09-06-2010 02:55 PM
    • Replies: 9
    • Views: 13,062
    09-07-2010, 03:56 AM Go to last post
  54. ANOVA table insignificant in Regression

    Greetings!!! Regression analysis produced ANOVA table insignificant. Please confirm if I should report regression results. Thanks Rayyan

    Started by itsrayyan‎, 09-19-2010 04:51 PM
    • Replies: 6
    • Views: 12,916
    09-23-2010, 04:43 PM Go to last post
  55. Multiple regression analysis: Significant regression model, insignificant predictors

    With regards to the title above, my multiple regression model has a significant F value but none of the predictors are significant. All the...

    Started by Serene‎, 08-19-2011 12:16 AM
    • Replies: 6
    • Views: 12,865
    08-30-2011, 04:51 PM Go to last post
  56. Multiple Linear Regression for Categorical and Continuous data Independent Variable

    Dear all, I need to analyze the relationship of DV and IV. I have Dependent variable in continuous data. And i have around 22 independent...

    Started by harishnan85_03‎, 09-22-2011 08:48 PM
    • Replies: 2
    • Views: 12,659
    09-22-2011, 10:17 PM Go to last post
  57. comparing regression coefficients from the same model

    Hi, I think this question has been answered in bits and pieces here and there, but I am still a bit unsure about what the best approach for this is:...

    Started by kk49‎, 02-14-2012 10:14 AM
    • Replies: 12
    • Views: 12,656
    02-16-2012, 12:47 PM Go to last post
  58. Increasing variance in linear regression

    Hi, I have a response and a predictor variable, weight and height, to which I've fitted a linear regression. The relationship appears to be...

    Started by Statstastic‎, 05-28-2008 10:26 AM
    • Replies: 6
    • Views: 12,574
    05-29-2008, 09:33 AM Go to last post
  59. Interpreting the coefficient in a NegBin regression

    Hi, I am doing a regression on immigration in Denmark. My dependent variable is a count variable with the number of immigrants between two regions...

    Started by Jeppe‎, 04-23-2011 04:20 PM
    • Replies: 1
    • Views: 12,491
    04-24-2011, 07:33 PM Go to last post
  60. Categorical Count Data and ANOVA

    Hi, I hope this is in the right section. I heard that ANOVA shouldn't be used for analysing categorical count data. If this is the case, can...

    Started by wy38‎, 08-17-2010 10:42 AM
    • Replies: 6
    • Views: 12,469
    08-17-2010, 09:54 PM Go to last post

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