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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. The Connection between conditional expectation and unconditional expectation

    William Greene, Econometric Analysis, 7th edition, 20th page: The zero conditional mean implies that the unconditional mean is also zero, since E...

    Started by alexyflemming‎, 09-28-2011 06:51 AM
    • Replies: 3
    • Views: 12,484
    10-02-2011, 02:18 PM Go to last post
  2. Regression with an Index as a dependent variable

    Dear all, I need help with a regression. My dependent variable is an index (ranging from 0 to 1). My independent variables are a dummy and a...

    Started by LillyLawson‎, 12-11-2010 04:51 PM
    • Replies: 2
    • Views: 12,476
    03-31-2014, 06:13 AM Go to last post
  3. hierarchical regression for controlling variables?

    For my dissertation, my supervisor told me to do a regression analysis and control for 2 variables. So should I report in my dissertation that I have...

    Started by veggie‎, 08-02-2012 03:24 PM
    2 Pages
    1 2
    • Replies: 15
    • Views: 12,392
    08-07-2012, 09:41 AM Go to last post
  4. linear regression model: LSE, Var, Cov etc

    Studying for a test.. can anyone check my solutions for (a)-(c) and give me any help on (d)? Any help would be appreciated. Consider the model Yi...

    Started by hanelliot‎, 06-03-2009 02:42 PM
    • Replies: 2
    • Views: 12,367
    06-04-2009, 08:24 PM Go to last post
  5. 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: 12,263
    01-12-2010, 12:22 PM Go to last post
  6. Logistic Regression or Chi Square?

    Hi everyone, I am a stats noob and am currently doing my fourth year thesis, examining moral development in children and adolescents. My design so...

    Started by melliehop‎, 08-30-2012 09:28 AM
    • Replies: 4
    • Views: 12,255
    09-03-2012, 08:34 AM Go to last post
  7. Multiple Groups Regression

    Hello to all who view my thread. And thank you in advance for any assistance. I am trying to compare changes in the associations between multiple...

    Started by adzzz‎, 02-13-2009 11:11 AM
    2 Pages
    1 2
    • Replies: 15
    • Views: 12,236
    07-20-2012, 04:22 PM Go to last post
  8. Sum of squares proof

    Hallo Im tring to prove that correct sum of cross products Sxy = Sum of (Xi)(Yi) - n XiYi given that Sxy = Sum of (Xi - Xbar)(Yi - Ybar). Can you...

    Started by RogerF‎, 09-28-2011 02:20 PM
    • Replies: 4
    • Views: 12,210
    09-29-2011, 03:22 AM Go to last post
  9. Question Extremely large Odds Ratios?!

    Hi, I've conducted a binary logistic regression with 1 independent variable (Type of property: flat/maisnette, terraced, semi-detached, detached and...

    Started by ljohnston86‎, 08-22-2011 03:17 PM
    logistic regression, odds ratios
    • Replies: 4
    • Views: 12,168
    12-13-2012, 10:19 AM Go to last post
  10. Post ANCOVA controversy?

    Hello all, I have a question regarding ANCOVA, which seems straightforward, however an answer has eluded me. The question is: Can a...

    Started by jhdc‎, 10-31-2009 04:43 PM
    • Replies: 3
    • Views: 12,088
    11-03-2009, 08:30 PM Go to last post
  11. multiple regression - beta coefficient - beta above 1

    Hey, I have a problem concerning multiple regression analyses and the beta coefficient. I conducted a multiple regression analysis with two...

    Started by Torsten‎, 03-03-2009 10:22 AM
    • Replies: 1
    • Views: 11,882
    03-03-2009, 05:06 PM Go to last post
  12. 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: 11,811
    02-27-2016, 11:51 PM Go to last post
  13. Firm Fixed Effects

    In some regressions the the authors control for “firm fixed effects”. What does that mean? What are Firm fixed effects specifically? Are they just...

    Started by JelleJansen‎, 12-14-2011 09:26 AM
    • Replies: 4
    • Views: 11,681
    12-15-2011, 08:22 AM Go to last post
  14. Dissertation help with Likert scale

    Hello, I'm having some problems with the stats for my dissertation. My dissertation is about the effect of the physical surroundings of a...

    Started by Bunecarera‎, 04-15-2008 05:28 AM
    • Replies: 9
    • Views: 11,531
    04-16-2008, 01:27 PM Go to last post
  15. 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: 11,506
    11-12-2010, 05:30 AM Go to last post
  16. 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: 11,474
    10-20-2008, 04:47 AM Go to last post
  17. Question Regression with a categorical moderator (with 3 catoegories)

    Hi All. I am wanting to run a moderating regression. But my moderator has 3 categories(Black, Asian, White). Usually, with a dichotomous...

    Started by sneaks‎, 08-27-2010 06:45 AM
    • Replies: 6
    • Views: 11,335
    08-27-2010, 07:50 AM Go to last post
  18. multinomial logistic regression vs multivariate logistic regression

    multinomial logistic regression vs multivariate logistic regression. Is there differences??? If so how to do with spss multivariate logistic...

    Started by tim999‎, 01-23-2011 08:16 AM
    • Replies: 2
    • Views: 11,266
    01-23-2011, 12:39 PM Go to last post
  19. Confusion over how to calculate regression coefficient

    I'm trying to find the regression coefficient of one set of a data on another. There is a linear relationship between the two sets of data. After a...

    Started by paddyg‎, 06-15-2011 04:32 AM
    • Replies: 6
    • Views: 11,265
    06-22-2011, 01:33 PM Go to last post
  20. negative AIC ?

    Hello, I ran model selection by delta AIC but encountered most of the AIC as negative. (R package AICcmodavg and stat : AIC) As reviewed by...

    Started by helenekuo‎, 07-28-2010 06:21 PM
    • Replies: 3
    • Views: 11,181
    08-03-2010, 12:03 PM Go to last post
  21. Post Reporting Logistic Regression in APA 6th Ed.

    Hello. I am trying to write up logistic regression with two predictors (one entered in step 1, and one entered in step 2) and then the interaction...

    Started by bakul‎, 09-20-2012 01:56 AM
    apa 6th ed., logistic regression, reporting statistics, write ups
    • Replies: 1
    • Views: 11,098
    09-20-2012, 04:58 AM Go to last post
  22. Question Logistic regression and correlation

    Hi I'm building an account management scorecard with logistic regression. Some of the variables have quite large correlations, but they get selected...

    Started by Jolene‎, 06-10-2011 04:12 AM
    correlation, logistic, multicollinearity, scorecard
    • Replies: 5
    • Views: 10,972
    04-24-2013, 05:00 PM Go to last post
  23. Exclamation Coefficients and standard deviations

    Hi, I have seen in a paper that the author states that the coefficient he gets in a regression implies that an increase of one standard deviation...

    Started by bobesp‎, 07-02-2008 03:52 PM
    • Replies: 2
    • Views: 10,907
    07-05-2008, 04:58 PM Go to last post
  24. mahalanobis distance critical values > 10 df

    dear all, analysing my dataset (N=1056) with SPSS for my Ph.D., I'm currently testing with linear multiple regression. before entering a...

    Started by hbos‎, 09-03-2009 09:58 AM
    • Replies: 0
    • Views: 10,889
    09-03-2009, 09:58 AM Go to last post
  25. Nonlinear regression using the Gauss-Newton algorithm in C

    Hey guys, I'm being asked to program this up in C. If any of you know of any good references for the Gauss-Newton algorithm, please post them for...

    Started by Link‎, 12-16-2010 04:59 PM
    • Replies: 7
    • Views: 10,870
    12-17-2010, 10:56 AM Go to last post
  26. SPSS- logistic regression, three patient groups, ROC curve

    Hi all, I have three groups of patients, and 6 variables for each patient. I want to combine these variables and make a multiclass ROC curve, in...

    Started by PaulineB‎, 11-09-2012 09:21 AM
    • Replies: 4
    • Views: 10,859
    11-11-2012, 09:54 AM Go to last post
  27. which regression model for time series?

    Hi guys, please help. I need to do regression analysis for demographic data. I am not sure whether linear or logistic regression would be...

    Started by Sylviastat‎, 02-28-2011 02:40 PM
    2 Pages
    1 2
    • Replies: 17
    • Views: 10,741
    03-02-2011, 10:59 AM Go to last post
  28. Multiple Regression and Confounding Factors

    I am working on my thesis project which involves analyzing whether a dichotomous independent variable has an effect on a continuous dependent...

    Started by laura77‎, 02-12-2012 06:24 PM
    confounders, multiple regression
    • Replies: 3
    • Views: 10,581
    02-13-2012, 09:45 AM Go to last post
  29. Wink Regression with sqrt transformed dependent variable - meaning of the model's B value?

    Hi fellow nerds :) My dependent variable had to be transformed by square root (so the residual plot would be normal). I usually use log10...

    Started by Stats_Idiot‎, 06-14-2012 05:39 AM
    dependent, regression, sqrt, square root, transformation
    • Replies: 3
    • Views: 10,579
    06-16-2012, 12:28 PM Go to last post
  30. Question insignificant variables- what to do?

    Hello, I'm running a few regressions for an econometrics paper and have a question: should insignificant independent variables be omitted from...

    Started by toni_azoulay‎, 12-03-2010 11:47 PM
    • Replies: 2
    • Views: 10,548
    12-04-2010, 01:23 AM Go to last post
  31. R squared change test for logistic regression

    Some call this F change tests other hieararchical regression (not to be confused with multilevel regression which is also called that by some). It...

    Started by noetsi‎, 01-07-2013 06:14 PM
    • Replies: 13
    • Views: 10,532
    01-08-2013, 06:17 PM Go to last post
  32. Question How to Calculate the Coefficient of Multiple Regression

    Hi Statistic Gurus I'm not really familar with multiple linear regression, and despite countless hours on google, I havn't found any clear...

    Started by Draze‎, 02-24-2010 04:33 AM
    • Replies: 2
    • Views: 10,449
    02-24-2010, 07:24 AM Go to last post
  33. cooks distance cutoff

    Hello, I urgently need to find out what is happening in regards to below: I am doing a huge number of simple linear regressions. For each...

    Started by Deccantraps‎, 08-07-2014 03:37 AM
    cooks distance, outlier detection
    • Replies: 9
    • Views: 10,425
    08-08-2014, 10:18 PM Go to last post
  34. BOX-COX transformation - Correct method

    Dear All, I fitted a quadratic model to a set of data. I am trying to apply the box-cox transformation to check if my data should be transformed....

    Started by Clovis‎, 08-05-2010 06:31 AM
    • Replies: 2
    • Views: 10,382
    09-08-2010, 09:44 AM Go to last post
  35. Sum of Residual equal to zero

    I want to know why when you multiply the residual by Y_hat the sum of this new equation is still zero? So in other words I have summation from 1...

    Started by Cookie‎, 08-05-2011 09:49 PM
    • Replies: 4
    • Views: 10,302
    08-07-2011, 11:17 PM Go to last post
  36. Multivariate normality

    I know various methods of determing if the bivariate relationship of two variables are normal. But, as Dason has drilled into me, its multivariate...

    Started by noetsi‎, 06-21-2013 04:16 PM
    4 Pages
    1 2 3 ... 4
    multivariate normality, outliers
    • Replies: 50
    • Views: 10,116
    09-02-2013, 10:04 PM Go to last post
  37. Beta positive - Slope of best fit line negative

    hello, scratching my head over some regression output i'm getting from Excel. as you can see from below, the best fit line on my indeptendent...

    Started by flatliner‎, 11-29-2011 07:03 PM
    2 Pages
    1 2
    • Replies: 16
    • Views: 10,042
    12-01-2011, 03:20 PM Go to last post
  38. Question interpretation Chow test

    Hey, I have run a Chow test, a test to detect a structural break for a specific period. The result of the test is in attachment. I can...

    Started by mathieuv‎, 04-07-2012 04:40 AM
    • Replies: 3
    • Views: 9,998
    04-08-2012, 01:45 AM Go to last post
  39. Insignificant coefficient in one model becomes significant in another model--???

    Aloha, A multiple regression finding is puzzling my adviser and I. Overall goal--to see if caregiver status (dummy, 0/1) and job variables...

    Started by ljcs‎, 04-27-2012 06:26 PM
    • Replies: 3
    • Views: 9,897
    05-10-2012, 07:21 PM Go to last post
  40. Logistic Regression: attaching 95% CI to predicted probabilities

    Hi All, I was wondering how calculate 95% CI for predicted probabilities. I have read how to do the same for odd-ratios, but the way in which what...

    Started by gianmarco‎, 12-01-2013 11:51 AM
    • Replies: 6
    • Views: 9,896
    12-02-2013, 04:54 PM Go to last post
  41. How to antilog a regression

    Hi, My excel regression produced the following: Coefficient Constant 6.5804 Log(Unit_Produced) -0.4752 The...

    Started by pcampin‎, 12-10-2011 11:21 AM
    • Replies: 4
    • Views: 9,877
    12-11-2011, 05:12 PM Go to last post
  42. Four-way interaction in linear regression

    Dear all, I have 4 independent variables, and I want to check their combined and interrelated effects on 1 dependent variable (thus 1 y and 4...

    Started by paul de boer‎, 09-08-2010 02:44 PM
    • Replies: 2
    • Views: 9,862
    09-14-2010, 01:33 PM Go to last post
  43. Logistic Regression: Testing for interaction effects with many covariates

    Hello everyone! As topic states, I am running a logistic regression with quite a lot of independent variables (23). There are a lot more candidate...

    Started by makadiwa‎, 01-20-2012 04:22 AM
    interaction, logit, stata
    • Replies: 3
    • Views: 9,858
    01-20-2012, 01:01 PM Go to last post
  44. Appropriate logistic regression model to control for confounders?

    I am working with a cross-sectional study sample (N=601). The goal of my research is to investigate if there is an association between a disease (X)...

    Started by CarlAH‎, 02-18-2011 04:26 PM
    • Replies: 2
    • Views: 9,852
    02-18-2011, 05:20 PM Go to last post
  45. Excel and StatPlus to do Multiple Regression

    Hi all--I would be grateful for any help with this! I am doing my statistics research project on whether or not there is a correlation b/w where...

    Started by Belle‎, 11-29-2012 05:26 PM
    • Replies: 4
    • Views: 9,824
    11-30-2012, 12:39 PM Go to last post
  46. Multiple regression test of significance using r squared

    I have a multiple regression with 5 independent variables, and obtained the r^2. Then I removed two IVs, and get the R^2 for the reduced model with...

    Started by mattc‎, 04-19-2011 01:47 PM
    • Replies: 4
    • Views: 9,751
    04-19-2011, 05:06 PM Go to last post
  47. confidence and prediction interval

    Let's say I have the following data: y: 19.695 77.310 138.938 16.382 36.249 111.078 9.497 61.270 42.804 52.931 x: 4.0860 8.6203 11.6592 3.6581...

    Started by macro90‎, 10-20-2005 02:58 AM
    • Replies: 1
    • Views: 9,738
    10-20-2005, 08:13 AM Go to last post
  48. linear regression for non normal data

    Hi, Some of my variables are not normally distributed (with Kolmogorov-Smirnov and Shapiro-Wilk tests). So I used Spearman's correlations. But I...

    Started by neurophilo‎, 02-04-2011 11:15 AM
    • Replies: 2
    • Views: 9,721
    02-04-2011, 11:34 AM Go to last post
  49. Non parametric equivalent to multiple regression?

    Hi everyone! My sample size is only 15. Is there a nonparametric equivalent to multiple regression? I have five predictors which correlate (using...

    Started by angoslezq‎, 04-17-2010 06:24 AM
    • Replies: 2
    • Views: 9,713
    04-17-2010, 08:26 PM Go to last post
  50. how to detect outliers for logistic regression model

    Hello, I am working on a logistic regression model. For several continuous variables, I need to detect outliers. What shall I do to detect outliers?I...

    Started by t.wang21@yahoo.com.au‎, 10-29-2013 06:01 AM
    • Replies: 3
    • Views: 9,647
    10-31-2013, 08:11 AM Go to last post
  51. How do you calculate B1 from a regression formula?

    I have this question, which essentially asks me to find B1, I know the answer is -2.28 but can't work out how to get it! Thanks in advance everyone....

    Started by mmeola‎, 12-15-2010 09:01 AM
    • Replies: 0
    • Views: 9,645
    12-15-2010, 09:01 AM Go to last post
  52. Univariate vs Multivariate Analysis, Quick Question

    Hey guys, I have a very quick question! I'm presenting a medical research paper and it uses univariate and multivariate analysis. Sometimes a...

    Started by THX‎, 11-05-2011 01:08 PM
    • Replies: 4
    • Views: 9,555
    11-07-2011, 04:32 PM Go to last post
  53. Multiple Regression: real-world example

    Everyone in my Advanced Stats class is completely stuck on this assignment, I don't know where else to turn... Using the paper/article "Predictors...

    Started by pr6758‎, 02-07-2013 07:31 AM
    multiple regression, regression
    • Replies: 3
    • Views: 9,541
    02-07-2013, 01:07 PM Go to last post
  54. Logistic Regression Skewed Data with Lots of zeros!

    Hello, I am working on a Logistic Regression where the results that I am getting are not satisfactory. The hosmer and lemeshow test is being...

    Started by Marcio_m_r‎, 04-22-2013 12:17 PM
    • Replies: 9
    • Views: 9,535
    04-24-2013, 05:58 PM Go to last post
  55. Assumptions of Linear Regression and Time Series

    Greetings, I am kind of confused while reading topics of Linear Regression and Time Series. There are bunch of assumptions to infer proper...

    Started by cozgenc‎, 01-18-2012 08:20 AM
    • Replies: 1
    • Views: 9,426
    01-18-2012, 12:05 PM Go to last post
  56. Logistic regression

    As far as I know logistic regression does not have beta weights, that is slopes which show which variable has the relatively greatest impact on the...

    Started by noetsi‎, 01-23-2013 01:14 PM
    4 Pages
    1 2 3 ... 4
    • Replies: 55
    • Views: 9,410
    04-10-2013, 10:12 AM Go to last post
  57. Exclamation Regression and Likert scale variable..HELP!

    Hi everybody, I'm wondering if it is possible to run a multiple regression with a dependent variable measured on a 5-point Likert scale (where 1...

    Started by Latika‎, 10-29-2010 12:14 PM
    • Replies: 11
    • Views: 9,393
    11-01-2010, 04:45 AM Go to last post
  58. Understanding Multilevel Model

    I'm slowly working through multilevel models and have a pretty specific question/though checking. Here's some R code: library(lme4);...

    Started by trinker‎, 02-17-2014 11:18 PM
    4 Pages
    1 2 3 ... 4
    multilevel model
    • Replies: 47
    • Views: 9,382
    02-23-2014, 11:48 PM Go to last post
  59. Hosmer-Lemeshow

    Hi! How do you discussion the vaule for the Hosmer-Lemeshow goodness of fitt in a logistic regression? I tha value 0,290 bad? Regards!

    Started by igolonte‎, 03-30-2011 07:25 AM
    • Replies: 7
    • Views: 9,328
    04-04-2011, 07:24 AM Go to last post
  60. confusion about Ho/Ha hypothesis for simple/multiple regression

    The one thing I do not understand (and my book doesn't explain) is how do you determine if it's Ha > 0, Ha < 0 or Ha =/= 0? Anyone can shed some...

    Started by Parad0x‎, 12-04-2009 01:02 PM
    • Replies: 2
    • Views: 9,323
    12-08-2009, 08:14 PM Go to last post

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