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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Hedonic regression

    What is the rationale behind hedonic quality index and how to interpret it? For any example/explanation beside the Wikipedia, I would be very...

    Started by john_f‎, Today 03:25 PM
    multiple regression, regression
    • Replies: 0
    • Views: 47
    Today, 03:25 PM Go to last post
  2. Regression Analysis for comparison of crime rates across a river

    I need a bit of help refining a regression comparing crime rates of counties separated by a river. My current equation looks like: ...

    Started by acoll‎, 11-25-2014 04:43 PM
    • Replies: 1
    • Views: 140
    Yesterday, 10:31 PM Go to last post
  3. Post Newbie question why we use regression ?

    Hello , Can someone explain to me why we use regression analysis , it will help us in understanding what ? , what we will gain from doing regression...

    Started by hanialbarni‎, Yesterday 10:00 PM
    • Replies: 2
    • Views: 84
    Yesterday, 10:28 PM Go to last post
  4. What is the “pdm” stat in the “rms” R package?

    I am new to the world of Regression in statistics and I have been doing a research in which I am building an ordinal logistic regression model (ORM)....

    Started by danielalencar‎, Yesterday 07:17 PM
    measurement, orm, pdm, regression, rms
    • Replies: 0
    • Views: 63
    Yesterday, 07:17 PM Go to last post
  5. bonferroni correction in multivariate regression

    hi, I just read something that made me think about this, the p-values we calculate in a multiple regression have no adjustment for multiple test (...

    Started by rogojel‎, 11-06-2014 01:00 PM
    2 Pages
    1 2
    bonferroni, multiple regressiom, significance
    • Replies: 20
    • Views: 613
    Yesterday, 04:26 PM Go to last post
  6. Interpreting multiple regression beta values

    Basic question here but just want to double check my understanding.. When I do a multiple regression I get beta values b1=0.01 and b2=0.7 This...

    Started by jfw13‎, Yesterday 11:43 AM
    beta values, regression
    • Replies: 5
    • Views: 98
    Yesterday, 03:33 PM Go to last post
  7. Guidance needed

    I am in healthcare and I want to predict future volume (primarily just the end of the current month). The problem I have with using a traditional...

    Started by psrs0810‎, 11-24-2014 08:03 PM
    • Replies: 2
    • Views: 115
    11-25-2014, 04:42 PM Go to last post
  8. Panel Data: Add Fixed Effects Before or After Controls?

    Hi all, I'm using 51 entities with seven independent variables. Is it typically better to add entity/time fixed effects at the beginning or at the...

    Started by GWStudent‎, 11-25-2014 12:27 AM
    panel data
    • Replies: 0
    • Views: 121
    11-25-2014, 12:27 AM Go to last post
  9. Smile Running multple, multiple regressions? which statistical test should i use?

    I have done a study on whether personality and demographics predict interaction on facebook brand pages. I have used a Big five personality scale...

    Started by arnika‎, 11-21-2014 09:22 AM
    correlation, regression, spss
    • Replies: 5
    • Views: 230
    11-22-2014, 08:18 AM Go to last post
  10. Regression analysis with independant variable (error) and multiple dependant variable

    So I took a lot of data (~10000) on a machine (3D printer). For each reading, I got the error and a lot of different parameter (speed, voltage,...

    Started by Elok‎, 11-18-2014 01:25 PM
    2 Pages
    1 2
    linearity, regression analysis
    • Replies: 26
    • Views: 603
    11-21-2014, 08:24 AM Go to last post
  11. Analyse a variable as continuous and as categorical

    Hello everybody I performed a univariate analysis of a set of predictors. My plan was to include the significant predictors in a multivariate cox...

    Started by noob‎, 11-20-2014 04:01 PM
    • Replies: 3
    • Views: 142
    11-21-2014, 08:14 AM Go to last post
  12. Double Regression?

    I am looking at two years of financial info by month. I need to project out next month - however, at the end of our one fiscal year there was a...

    Started by psrs0810‎, 11-20-2014 10:11 AM
    • Replies: 1
    • Views: 127
    11-20-2014, 03:08 PM Go to last post
  13. Mathematical calculation in Access

    I have a math problem and I want to ask me pomognete.I working on complex desktop database.My main point is making the application for the simulation...

    Started by j235‎, 11-18-2014 04:38 PM
    • Replies: 1
    • Views: 116
    11-18-2014, 05:16 PM Go to last post
  14. SVAR parameter standard errors

    Hi everyone, How to calculate the standard errors of SVAR parameters. I know how to estimate it for contemporaneous parameter. I want to know how...

    Started by cjiang3‎, 11-17-2014 12:55 PM
    svar, var
    • Replies: 2
    • Views: 177
    11-18-2014, 09:27 AM Go to last post
  15. REGRESSION are these real findings or outcomes of preexisting differences?

    Hi guys, I have a N=138 sample that consists of 56 participants form one country and 82 from another country. When i run a stepwise regressions...

    Started by coffeehipster‎, 11-15-2014 07:55 PM
    • Replies: 2
    • Views: 208
    11-17-2014, 07:27 PM Go to last post
  16. Dummy variables (and poster!)

    Hi, Could someone please help me understand dummy variables? If I had a variable which was “Religion” that was coded: 1 = Catholic 2 =...

    Started by Kenny‎, 11-16-2014 12:42 PM
    • Replies: 1
    • Views: 131
    11-16-2014, 03:52 PM Go to last post
  17. Interaction/Moderation Question

    So I know that the terms interaction and moderation are used pretty much interchangeably. However, is it possible for variables to interact without...

    Started by RER31‎, 11-14-2014 09:36 PM
    • Replies: 4
    • Views: 208
    11-16-2014, 08:42 AM Go to last post
  18. Reporting results of non-linear regression with centered variables

    Hi I have a regression y = a + b1(x) + b2(x^2) + ...bn + e when i run the regression b1 and b2 are significant (and of opposite sign) but...

    Started by steve1‎, 11-04-2014 11:55 AM
    • Replies: 3
    • Views: 294
    11-14-2014, 11:12 AM Go to last post
  19. Rank-ordered Logistic Regression - assumptions?

    Hello dear forum members, The DV in the recently undertaken study is Rank (1-899). I believe, rank-ordered logistic regression is the proper type...

    Started by kiton‎, 11-14-2014 11:08 AM
    • Replies: 0
    • Views: 87
    11-14-2014, 11:08 AM Go to last post
  20. how to find interaction terms in regression modeling

    Given a set of predictor variables, are there any ways to test interaction terms? If I test one by one, it will be impossible to do it?

    Started by winecoding‎, 11-13-2014 08:13 PM
    interaction, regression
    • Replies: 3
    • Views: 187
    11-14-2014, 10:58 AM Go to last post
  21. Hotelling's Trace v. Hotelling's T^2- Why make the move?

    Hello, I am writing a dissertation and my chair wants me to convert Hotelling's Trace (resulting from my MANOVA) into Hotelling's T^2. No problem...

    Started by te156311‎, 11-14-2014 07:17 AM
    anova, hotelling's, manova, regression, t-tests
    • Replies: 0
    • Views: 87
    11-14-2014, 07:17 AM Go to last post
  22. Avoiding spurious regression in meta-regression using stationary variables like GDP

    I have been reading everything I can get my hands on about spurious regression but can't seem to definitively find out what is best in regressing...

    Started by samuelle‎, 11-12-2014 11:10 AM
    gdp, meta-regression, spurious, stationary variables
    • Replies: 0
    • Views: 152
    11-12-2014, 11:10 AM Go to last post
  23. Instrumental Variable Regression

    Dear All I am writing my master thesis about countervailing power in the HIV medication drug market. For doing so I am conducting the regression:...

    Started by Nathalie_Frisch‎, 11-10-2014 10:41 AM
    • Replies: 1
    • Views: 188
    11-10-2014, 01:07 PM Go to last post
  24. Calculating AUC for just one binary variable legitimate?

    Dear members of talkstats, I am a junior Radiology resident in France and I have an urgent question about my study. I am checking the capability...

    Started by MeganFrance‎, 10-13-2014 04:19 PM
    • Replies: 4
    • Views: 336
    11-08-2014, 08:06 AM Go to last post
  25. help deciding on best fit regression model

    Hi I could do with some assistance for selecting a regression model for my data. The data is for a BSc science study and is analyising the...

    Started by rat101‎, 11-08-2014 04:56 AM
    • Replies: 0
    • Views: 152
    11-08-2014, 04:56 AM Go to last post
  26. Some Conceptual Questions About Quantile Regression

    Dear all, I have been teaching myself how to run quantile regression in R using the package called "quantreg." I was able to run these analyses...

    Started by myautumn28‎, 10-27-2014 11:10 PM
    • Replies: 1
    • Views: 227
    11-07-2014, 09:35 AM Go to last post
  27. Unhappy Logistic Regression on small sample size/case ratio - SPSS?

    Hi all - I have a small issue. I have a categorical dichotomous DV (0,1) with 4 IV's , two of which are categorical and dichotomous (0,1), and the...

    Started by ProXy124c41‎, 10-30-2014 01:08 PM
    logistic
    • Replies: 2
    • Views: 344
    11-03-2014, 10:04 PM Go to last post
  28. Get correlation matrix of 3 variables from any combination of 3 simples/partials

    Here is the situation. I am writing a program that does Cool And Interesting Things starting with a correlation matrix among 3 variables: call...

    Started by Jake‎, 10-29-2014 06:44 PM
    • Replies: 0
    • Views: 209
    10-29-2014, 06:44 PM Go to last post
  29. Question Forecasting with fewer data points

    Hi, Can someone provide more insights on how we can achieve forecasting with fewer data points and come up with more accurate models. I have...

    Started by sihasan‎, 10-23-2014 08:53 AM
    forecasting
    • Replies: 4
    • Views: 286
    10-29-2014, 09:46 AM Go to last post
  30. Reporting variables into main equation after sqrt or log transformation

    Hi Everybody, If I am creating a multiple regression model such as Y = 3 + 1.5apple + 2melon and some of the indipendent variables underwent a...

    Started by F111‎, 10-23-2014 06:12 PM
    heteroskeds
    • Replies: 0
    • Views: 185
    10-23-2014, 06:12 PM Go to last post
  31. Analysis of a longitudinal study where interventions are received at different times

    I have a data set of university students. The university has 8 different assisting programs, mostly like scholarships, for needy students to help...

    Started by Blain Waan‎, 10-20-2014 03:08 PM
    longitudinal study, regression analysis, repeated measures
    • Replies: 2
    • Views: 259
    10-23-2014, 05:56 AM Go to last post
  32. Summarizing time series data

    Hello, Thank you very much for taking the time to read this! I have many (~70) time series showing the average body size (kg) for the ~50...

    Started by kmj‎, 10-20-2014 11:53 PM
    series, temporal, time, time series
    • Replies: 5
    • Views: 339
    10-21-2014, 05:18 PM Go to last post
  33. Writing R^2 strictly in terms of simple correlations among variables

    Say we have the following regression Y_i=\beta_0+\beta_1X_{1i}+\beta_2X_{2i}+\epsilon_i I want to write the multiple R^2 for this regression...

    Started by Jake‎, 10-17-2014 04:45 PM
    • Replies: 7
    • Views: 390
    10-18-2014, 03:05 PM Go to last post
  34. Inclusion of a control variable makes a predictor significant

    I'm running a logistic regression model. The outcome is political activism (1/0) and the significant predictors (dummy variables) are education,...

    Started by jjarg‎, 10-16-2014 04:23 PM
    logistic regression
    • Replies: 3
    • Views: 391
    10-18-2014, 06:41 AM Go to last post
  35. How can log link still allow negative predicted values?

    I have been attempting to get a meaningful outcome of my data for months, and could really do with some help where to go next. I am attempting to...

    Started by samuelle‎, 10-17-2014 11:50 AM
    glm regression, negative values, regression
    • Replies: 0
    • Views: 163
    10-17-2014, 11:50 AM Go to last post
  36. Multilevel: Include only two dummies of a 7-1 dummy set into random slope?

    I am calculating a two-level linear multilevel analysis. A look at the random intercept random slope model showed me a significant decrease in my...

    Started by David_D‎, 10-15-2014 12:44 PM
    • Replies: 5
    • Views: 354
    10-16-2014, 02:50 PM Go to last post
  37. regression models with mixed types of independent variables

    I am working on building a forecasting model, the independent variables are grouped into three types: some variables are continuous; some variables...

    Started by winecoding‎, 10-14-2014 11:24 PM
    forecasting, regression
    • Replies: 6
    • Views: 342
    10-15-2014, 01:45 PM Go to last post
  38. Hierarchical Regression Analyses - Testing for a Potential Power Issue

    Hi all, My sample consists of 236 participants and I am interesting in investigating the association of several factors with my outcome variable....

    Started by Junmato‎, 10-11-2014 12:10 PM
    • Replies: 1
    • Views: 324
    10-15-2014, 11:38 AM Go to last post
  39. Probing of interaction effect with MODPROB (Preacher & Hayes)

    Hello everyone, I have a result that I cannot quite understand. I have the following equition Y: Regret X: curiosity M: 2 conditions (0=...

    Started by Livdndri‎, 10-14-2014 09:36 AM
    • Replies: 1
    • Views: 228
    10-14-2014, 12:24 PM Go to last post
  40. positive loglikelihood?

    It seems to be no issue to have positive log likelihood in linear regression. How should I however interpret two positive LLs? In normal situation...

    Started by arkiaamu‎, 10-11-2014 08:45 AM
    • Replies: 1
    • Views: 221
    10-11-2014, 11:07 AM Go to last post
  41. Is poisson regression appropriate?

    This is more of a general stats question regarding the best procedure to answer my question of interest. I started to address it using poisson...

    Started by mrlang02‎, 10-10-2014 03:22 PM
    poisson regression
    • Replies: 0
    • Views: 230
    10-10-2014, 03:22 PM Go to last post
  42. Regression with cointegrated time series data

    Hello, I am studying a predator-prey relationships using field data collected biannually over 5 years. For example, here is some abundance data: ...

    Started by marshmugger‎, 10-04-2014 06:36 AM
    autocorrelation, time series regression
    • Replies: 3
    • Views: 342
    10-10-2014, 02:08 PM Go to last post
  43. Regression when IV are part of DV

    I have a DV that is made up of 7 IV. If you combine the IV you get the DV. I want to know the relative impact of each of the IV on the DV (relative...

    Started by noetsi‎, 10-09-2014 12:29 PM
    • Replies: 7
    • Views: 301
    10-10-2014, 02:02 PM Go to last post
  44. Appropriateness of semi-partial correlation squared when there are 10 predictors?

    Hi all, I'm conducting multiple regression with a regression model consisting of 10 predictors (4 of which are key study variables, the remainder...

    Started by thematfactor‎, 10-10-2014 01:39 AM
    • Replies: 0
    • Views: 159
    10-10-2014, 01:39 AM Go to last post
  45. Help interpret Odds Ratio for Age in logistic regression

    For the following results, am I correct in stating, for example, that men with children less than 16 years old are less likely to not complete...

    Started by jmhbot‎, 10-07-2014 12:21 PM
    • Replies: 9
    • Views: 378
    10-09-2014, 07:36 PM Go to last post
  46. Question about modeling public behavior

    I signed-up for this site hoping someone might be able to help me with a question I've been struggling with. I'm currently building a model that...

    Started by travisvox‎, 10-09-2014 02:36 PM
    • Replies: 3
    • Views: 235
    10-09-2014, 03:37 PM Go to last post
  47. Help, regression analysis for unbalanced data set

    Hi, guys, I need test whether a gene is differentially expressed between two groups, for example, In group 1, we have species A, species B,...

    Started by owomo‎, 10-08-2014 10:19 PM
    • Replies: 0
    • Views: 226
    10-08-2014, 10:19 PM Go to last post
  48. Feedback Questions (Robust)

    Dear all, Have recently had some high level feedback on a regression study. "How robust is your empirical results? I would like to see some...

    Started by richieboy‎, 10-05-2014 05:34 AM
    • Replies: 1
    • Views: 261
    10-05-2014, 06:31 AM Go to last post
  49. How to reduce variables in multiple linear regression when multicollinearity present?

    Good morning, afternoon, evening to everyone. First and foremost, this is my innaugural post so I hope I am following all of the recommended...

    Started by heyblinkin‎, 10-03-2014 04:40 PM
    • Replies: 6
    • Views: 379
    10-04-2014, 11:47 AM Go to last post
  50. Mixed models can variable be both fixed and random

    I am conducting an analysis over multiple subjects over several sessions with two types of controls. I want to conduct a mixed model analysis to...

    Started by Phdstudentz‎, 10-02-2014 01:42 PM
    fixed effect, longitudinal data, mixed effect models, random effect
    • Replies: 0
    • Views: 216
    10-02-2014, 01:42 PM Go to last post
  51. range of tuning parameters

    Hi All, I have just started my advanced statistics study. And here is one thing I have not been able to understand for long time -- how can we...

    Started by bettertony‎, 10-01-2014 03:40 PM
    cross validation, linear regression, regression, regularization, tuning, tuning parameter
    • Replies: 6
    • Views: 347
    10-01-2014, 08:09 PM Go to last post
  52. Probability of Predicted Values

    As I am still just learning regression and other advanced statistical analysis techniques, I have run into a question that I need help with. My Boss...

    Started by ccooper‎, 10-01-2014 08:51 AM
    gbm, prediction interval, prediction limits
    • Replies: 2
    • Views: 239
    10-01-2014, 03:08 PM Go to last post
  53. Understanding ordinal regression

    Hi! This is a really simple question, but one for which the answer continues to elude me! I understand that in a binary logit regression the...

    Started by Bfernandez‎, 10-01-2014 12:08 PM
    ordinal regression, regression analysis, regression coefficients
    • Replies: 0
    • Views: 142
    10-01-2014, 12:08 PM Go to last post
  54. Binary IV and ordinal DV, suggestions for a model?

    Hi guys! Just started at a new company having graduated this year, theyve got me analysing data and producing some key driver analytics. Thing is,...

    Started by Bfernandez‎, 09-19-2014 12:20 PM
    • Replies: 4
    • Views: 290
    10-01-2014, 04:57 AM Go to last post
  55. Time series forecasting

    Can any one explain how to forecast volatility in stock markets using auto-regressive models like TARCH, EGARCH etc.

    Started by timeseries‎, 09-30-2014 10:22 AM
    • Replies: 0
    • Views: 197
    09-30-2014, 10:22 AM Go to last post
  56. Interpreting transformations

    Say you transformed an X and Y in a regression model and you find that after the transformations X is signficant. Does this mean that the original X...

    Started by noetsi‎, 09-25-2014 12:07 PM
    • Replies: 2
    • Views: 237
    09-30-2014, 05:37 AM Go to last post
  57. whole data vs training/test data

    I have time series data of about 150 sample and 8 variables. It is used to generate a interaction network, whose exact structure is not known yet. ...

    Started by ice‎, 09-29-2014 03:41 PM
    non linear regression, validation
    • Replies: 1
    • Views: 246
    09-30-2014, 05:32 AM Go to last post
  58. Question Compute time to sell (with 50% probability) at Price P from linear regression

    I think this is a very basic question (from a total stat newbie). I'm trying to understand a problem I was given (I'm not a statistics student). It's...

    Started by mellema‎, 09-29-2014 12:30 AM
    linear regression, probability
    • Replies: 0
    • Views: 180
    09-29-2014, 12:30 AM Go to last post
  59. Small sample cross-sectional regression: different levels

    I have a small sample of about 50 firms, clustered in 20 countries. The main explanatory variables of interest are all firm-specific, as well as...

    Started by wilswine‎, 09-27-2014 10:43 AM
    cross sectional, ols regression
    • Replies: 0
    • Views: 231
    09-27-2014, 10:43 AM Go to last post
  60. Linear Regression

    Please see this link: http://www.statisticsforum.com/showthread.php?p=4240#post4240

    Started by DDD‎, 09-25-2014 02:56 PM
    • Replies: 4
    • Views: 322
    09-25-2014, 05:28 PM Go to last post

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