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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. What tests can I use?

    Basically, I have to variables Carbon Monoxide (CO) and Black Smoke. I have to test whether black smoke influences the level of CO in the...

    Started by KimboSlice‎, 01-07-2014 12:20 PM
    correlation, regression, scatterplot, spearman's rank
    • Replies: 1
    • Views: 1,189
    01-07-2014, 06:02 PM Go to last post
  2. Blinder-Oaxaca decomposition- T-stats and Group Indicator Variable

    Hi everyone, I'm currently doing some pooled blinder oaxaca decompositions on ethnic discrimination using the UK LFS data and have two questions....

    Started by mulleyman‎, 01-07-2014 08:54 AM
    • Replies: 0
    • Views: 1,143
    01-07-2014, 08:54 AM Go to last post
  3. Negative Binomial Reg - why changes in significance using one less/similar variables?

    Hi, I am running a NBR on a sample of 500 participants to predict survival rate from a set of health indices eg. diagnosed diabetic, history of...

    Started by buggles001‎, 01-07-2014 06:46 AM
    • Replies: 0
    • Views: 955
    01-07-2014, 06:46 AM Go to last post
  4. what t value is usually the threshold for significance?

    i have an exercise asking me to estimate the t values of the coefficients of my regression and then state if they significant or not. but he does not...

    Started by eac13‎, 01-04-2014 07:32 PM
    • Replies: 4
    • Views: 5,050
    01-05-2014, 12:36 AM Go to last post
  5. Comparing Regression Slopes Across 3 Groups - SPSS

    I am running a simple regression with one dependent variable and one independent variable but splitting the results by group (3 groups). So, I am...

    Started by JerLon‎, 01-03-2014 06:56 PM
    • Replies: 4
    • Views: 2,989
    01-04-2014, 05:47 PM Go to last post
  6. Binary mult. regression - Interpreting a coefficient

    Hi, I have a regression model (from publisher solution) as follows: Coefficient Regression Table Constant -29470.27 Size 78.429 Number...

    Started by pcampin‎, 01-03-2014 12:09 PM
    • Replies: 3
    • Views: 1,745
    01-04-2014, 11:40 AM Go to last post
  7. can you help me interpret this?

    Vitamin D varies with season, below is a method of de-seasonalising vit D from literature. I'm not too sure what they've done after regressing the...

    Started by bobmcpop‎, 12-30-2013 06:50 AM
    • Replies: 4
    • Views: 1,698
    01-04-2014, 10:50 AM Go to last post
  8. Using country dummy variables?

    Hi, Short introduction I`m currently researching whether institutional factors have an effect on Earnings management (dependent var.). Not sure...

    Started by Jobbel‎, 01-04-2014 10:18 AM
    • Replies: 0
    • Views: 2,668
    01-04-2014, 10:18 AM Go to last post
  9. Logistic regression with significant coefficient but .000 Exp(B)

    I am getting an output for a binary logistic regression I can't quite figure out how to interpret. It is a 0/1 binary logit, with 10 numeric IVs....

    Started by mylesg‎, 01-02-2014 05:34 PM
    logistic regression
    • Replies: 9
    • Views: 6,036
    01-03-2014, 04:32 PM Go to last post
  10. Spatial Econometrics - Bias?

    Dear all, I seem to be lost with the following problem in spatial econometrics: Assume the true model is a spatial error model (SEM). It is...

    Started by ARDE‎, 01-03-2014 06:18 AM
    bias, sem, spatial, spatial econometrics
    • Replies: 0
    • Views: 2,222
    01-03-2014, 06:18 AM Go to last post
  11. Tobit Interpretation

    Hi I was having trouble identifying how to interpret the effects of variables upon actual and latent dependent variables. I have uploaded...

    Started by Shailen‎, 01-02-2014 01:51 PM
    • Replies: 1
    • Views: 993
    01-03-2014, 02:23 AM Go to last post
  12. Question Questions about HLM 2-Way Interactions calculation

    Hi all, I am using HLM 2-Way Interactions calculator to yield simple slopes:). w1 was the moderator in level 1 while x1 was the predictor in...

    Started by kevinpsy‎, 01-02-2014 10:46 PM
    • Replies: 0
    • Views: 2,080
    01-02-2014, 10:46 PM Go to last post
  13. Distribution of Residual Sum of Squares

    We know that the residual sum of squares (RSS) has a  sigma^2 * Chi Square (n-p degrees of freedom) So if I want to simulate many...

    Started by spairos‎, 01-02-2014 06:09 PM
    • Replies: 3
    • Views: 3,465
    01-02-2014, 09:07 PM Go to last post
  14. Interaction effect in a DID analysis

    Hi, I had a little argument with my thesis advisor, who said that I couldn't operate with the coefficients of my model without doing a "likelihood...

    Started by PedroR‎, 01-02-2014 03:52 PM
    • Replies: 1
    • Views: 1,443
    01-02-2014, 05:26 PM Go to last post
  15. Linear Regression - variable issues!

    Hi there, I am trying to run a linear regression on some data to investigate a mediating relationship. There are three variables: whether or not...

    Started by soph_MBPsS‎, 12-20-2013 10:55 AM
    • Replies: 1
    • Views: 997
    01-02-2014, 05:07 PM Go to last post
  16. Can I use group mean centered variables in an OLS regression?

    Hi everyone, I have a question about some analyses I'm working through. I originally ran the model as an HLM because of the nested structure of my...

    Started by sch182‎, 01-02-2014 03:41 PM
    group mean centered, hlm, ols, regression
    • Replies: 0
    • Views: 1,835
    01-02-2014, 03:41 PM Go to last post
  17. Summarizing hierarchical multiple regression (moderation) tables into One - APA?

    I have performed a series of 18 hierarchical multiple regression analyses to test for moderation effect. One dependent variable, two independent...

    Started by JerLon‎, 01-01-2014 01:58 PM
    • Replies: 0
    • Views: 2,848
    01-01-2014, 01:58 PM Go to last post
  18. determine / eliminate influence of confounding variable on 10 data series

    Any help with the problem below would be greatly appreciated. I have very little knowledge of statistics. I am using excel. I have measured...

    Started by khe‎, 12-31-2013 01:34 PM
    confounding variable, pollution
    • Replies: 1
    • Views: 967
    12-31-2013, 02:45 PM Go to last post
  19. 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: 15,830
    12-29-2013, 02:19 PM Go to last post
  20. Derivation of t-test for regression coefficient

    Hello, at the moment I am researching, if the t-statistic is appropriate for a significance test of the regression coefficient on a dummy...

    Started by consuli1‎, 12-26-2013 06:33 PM
    • Replies: 4
    • Views: 2,296
    12-28-2013, 12:36 PM Go to last post
  21. Correlation with control group

    Hi! Sorry if this is a very basic question. If you have two groups: diseased and control. Both groups undergoes an intervention giving you two...

    Started by SOslo‎, 12-27-2013 07:08 PM
    correlation analysis, linear regression, multiple regression, partial correlation
    • Replies: 2
    • Views: 1,910
    12-28-2013, 10:20 AM Go to last post
  22. probit vs biprobit

    Its probably just a simple understanding question. Say i have two endogenous binary variables y1 and y2 and I think they are somehow correlated....

    Started by Benrath‎, 12-24-2013 10:54 AM
    • Replies: 0
    • Views: 1,310
    12-24-2013, 10:54 AM Go to last post
  23. parameter estimate of categorical variable

    I run multiple regression with 2 continuous and 1 categorical variable (3 levels). SAS will hold the last level of the categorical variable and will...

    Started by szm‎, 12-22-2013 06:04 PM
    categorical, interaction, parameter estimation, regression
    • Replies: 10
    • Views: 2,768
    12-23-2013, 10:48 PM Go to last post
  24. Interaction term in the logistic regression model

    I hypothesize that smoking status increases risk of heart attack but this effect is modified by the level of a certain hormone. There is no...

    Started by vicvan‎, 12-23-2013 02:51 PM
    • Replies: 3
    • Views: 2,272
    12-23-2013, 04:02 PM Go to last post
  25. Need help for regression

    For liner regression model with two independent variables. Is there any way to calculate SSE by given SSX1 SSX2 SST and r12?

    Started by Marlon.shi‎, 12-22-2013 12:50 AM
    • Replies: 0
    • Views: 1,431
    12-22-2013, 12:50 AM Go to last post
  26. Estimation - the best factor?

    I need your help if you can. I get some measurement results. If everything work correct results keep close to nominal value: If the...

    Started by darwoz‎, 12-20-2013 02:40 PM
    • Replies: 0
    • Views: 1,805
    12-20-2013, 02:40 PM Go to last post
  27. significant variable within a non-significant model/block in hierarchical regression

    Greetings. I'm conducting a hierarchical (aka sequential) regression analysis with four blocks of variables. Block 1 consists of 5 covariates. Sex...

    Started by vtmft‎, 12-20-2013 02:04 PM
    hierarchical regression, significance
    • Replies: 0
    • Views: 2,188
    12-20-2013, 02:04 PM Go to last post
  28. Linear Mixed Model, Fixed effects

    Hi, I have a panel data of 40 countries and two 5-year averages observations. I'm trying to investigate the effect of foreign direct investment on...

    Started by marta.polk‎, 12-20-2013 10:08 AM
    • Replies: 0
    • Views: 961
    12-20-2013, 10:08 AM Go to last post
  29. Math interpretation of linear regression through the origin and related estimates

    Hello all, while group-doing some basic linear regression I've stumbled upon a puzzling matter. Given a set of points in the form (x_i, y_i), I...

    Started by ocirne94‎, 12-19-2013 04:44 PM
    angular coefficient, arithmetic mean, chi-square, linear regression
    • Replies: 4
    • Views: 1,927
    12-20-2013, 09:08 AM Go to last post
  30. Confidence interval of a delta-Rsquare

    Hello all, ¿Does someone know if there is any way to obtain the confidence interval (or the SE) of a delta-Rsquare when fitting a latent variable...

    Started by Holmes‎, 12-20-2013 06:06 AM
    • Replies: 0
    • Views: 1,246
    12-20-2013, 06:06 AM Go to last post
  31. Red face Stratified sampling for regression analysis

    Hello guys! I’m struggling to define the sample of a statistical study of judicial decisions, and need your help to solve some doubts. I have...

    Started by langmut‎, 12-14-2013 01:33 PM
    • Replies: 3
    • Views: 2,281
    12-19-2013, 11:24 AM Go to last post
  32. Treatment effect on samples with pre-existing difference

    I have two samples. One has received the treatment, the other has not. N for the treatment sample is 400. N for the non-treatment sample is 1200. ...

    Started by fatso101‎, 12-18-2013 04:17 PM
    • Replies: 2
    • Views: 1,361
    12-18-2013, 07:20 PM Go to last post
  33. ARIMA Modelling

    I'm performing some ARIMA modelling on time series data for UK energy consumption for my dissertation at university. At a bit of a loss though. So...

    Started by Hazbuk‎, 12-12-2013 06:49 AM
    • Replies: 10
    • Views: 2,487
    12-17-2013, 09:47 AM Go to last post
  34. Regression coefficient- need help!!

    Suppose that we have regressed the log of household median income on the Gini coefficient and obtained the following result. Standard errors are...

    Started by DesiPrincess1028‎, 12-15-2013 09:32 PM
    f-static, gini, regression coefficent
    • Replies: 1
    • Views: 2,065
    12-16-2013, 11:12 AM Go to last post
  35. Smile logistic regression and test for confounding (urgent)

    Hi, Im using SPSS to examine a relationship between A and B, and test for confounder C I wrote the whole question but for some reason when I...

    Started by Misrati‎, 12-15-2013 10:02 PM
    • Replies: 0
    • Views: 1,697
    12-15-2013, 10:02 PM Go to last post
  36. Logistic regression, weighting, and variance estimation

    Hi; I have logistic regression models based on Pew survey data (predicting self-reported turnout), and I could use some help on identifying the...

    Started by Michael91‎, 12-14-2013 04:03 PM
    • Replies: 0
    • Views: 1,043
    12-14-2013, 04:03 PM Go to last post
  37. Help - Moderation with dummies in Cox Regression

    Hi, I am currently working on my masters thesis. I am testing how team change following an acquisition affects the survival of the...

    Started by Giu_Gre‎, 12-14-2013 02:23 PM
    • Replies: 0
    • Views: 1,758
    12-14-2013, 02:23 PM Go to last post
  38. Interpretation of Marginal effects in Tobit model

    hi ,,,, i have estimated censored regression model and also estimated the marginal effects after log transformation of dependent variable. guide...

    Started by rrebecca6‎, 12-14-2013 10:27 AM
    • Replies: 0
    • Views: 2,957
    12-14-2013, 10:27 AM Go to last post
  39. poisson regression (Offset or not)

    Here is the problem and my question: A group of 250 pediatric patients with hydrocephalus who had received a ventriculoperitoneal shunt (VP) was...

    Started by Jokee‎, 12-13-2013 05:39 PM
    offset, poisson, regression problem, smart people
    • Replies: 0
    • Views: 1,595
    12-13-2013, 05:39 PM Go to last post
  40. Call Center Prediction Model

    I have an interesting task to determine the best model for forecasting the number of calls coming into our call center each hour of the day. One...

    Started by syswizard‎, 12-10-2013 10:15 AM
    • Replies: 8
    • Views: 2,626
    12-13-2013, 10:02 AM Go to last post
  41. Importance of Normality Assumption for Hypothesis testing methods

    Hello everyone! Can someone please share their thoughts on the following question with me. Methods of hypothesis testing usually has a...

    Started by CrazyST‎, 12-12-2013 08:57 PM
    difference of means, normality, regression analysis
    • Replies: 1
    • Views: 1,801
    12-13-2013, 09:15 AM Go to last post
  42. Principal Component Regression - Interpretation

    Hi, I am having some doubts about the interpretation of my research. I've conducted a Principal component analysis and used those components as...

    Started by han‎, 12-13-2013 06:33 AM
    • Replies: 0
    • Views: 1,702
    12-13-2013, 06:33 AM Go to last post
  43. Confidence Interval With Regressed Logarithms

    I have converted 80 ("Count") pairs of X and Y to L10(X) and L10(Y) and performed a regression analysis. Assuming a valid correlation, I know I can...

    Started by cisaak‎, 12-12-2013 05:27 PM
    • Replies: 0
    • Views: 1,163
    12-12-2013, 05:27 PM Go to last post
  44. semi parametric

    kindly guide me about the commands of seater model for semi parametric in R software:)

    Started by maqsood.aslam‎, 12-12-2013 10:07 AM
    • Replies: 0
    • Views: 1,931
    12-12-2013, 10:07 AM Go to last post
  45. Multivariate timeseries regression - use of a dummy variable between two time periods

    Dear stat people I am doing an analysis on how the relation between Y and three explanatory variables change from one time period to the next. I...

    Started by dummy mouse‎, 12-11-2013 01:11 PM
    dummy variable
    • Replies: 0
    • Views: 1,350
    12-11-2013, 01:11 PM Go to last post
  46. Probit regression with sparse data - Should i standardize data or ??

    I am trying to create a probit model (later other models like logit, cloglog and weirder stuff will be tried feel free to make suggestions!), the...

    Started by EconGeek‎, 12-11-2013 10:37 AM
    probit, sparse data
    • Replies: 0
    • Views: 1,315
    12-11-2013, 10:37 AM Go to last post
  47. Fitting 3 mixed-effects models with different outcome variables

    Hi all The overarching dependent variable in my study is mental processing. Since this is a hard-to-grasp construct, I've used three measurements...

    Started by lucnv‎, 12-11-2013 06:57 AM
    different dvs, mixed-effects
    • Replies: 0
    • Views: 1,411
    12-11-2013, 06:57 AM Go to last post
  48. Percentages regression

    I need to do a regression analysis as part of my dissertation and am quite lost. What I want to do is to see if there is a correlation between a...

    Started by andrea.khgh‎, 12-11-2013 03:45 AM
    • Replies: 2
    • Views: 2,213
    12-11-2013, 04:06 AM Go to last post
  49. Interpreting White test for heteroskedasticity

    Hello, i am using Gretl software and run a OLS regression on a set of panel data. I am trying to find out if there is hetereskedasticity in the...

    Started by elkomaro‎, 12-10-2013 06:23 PM
    gretl, heteroskedasticity, white test
    • Replies: 1
    • Views: 22,776
    12-10-2013, 06:49 PM Go to last post
  50. Bayesian approach for logistic regression models? (the case of low-count cells)

    so... now that i'm a PhD student my advisor wants me to help out people with their projects. as fate may have it, the same problem has arisen both in...

    Started by spunky‎, 12-09-2013 04:26 PM
    2 Pages
    1 2
    • Replies: 15
    • Views: 5,468
    12-10-2013, 01:54 PM Go to last post
  51. How to put weights on indenpendent variables in a regression analysis?

    Hello, I want to do a regression of a continuous dependent variable (y) (say grams of crystals formed) using several independent variables (also...

    Started by sakuraono‎, 12-04-2013 07:12 AM
    regression, weighted parameters
    • Replies: 5
    • Views: 1,687
    12-10-2013, 01:03 PM Go to last post
  52. Model checking and generalized multilinear regression

    Dear all, In my research I am analyzing the quality of game player softwares by making them play multiple times against a certain opponent and...

    Started by soriano‎, 12-10-2013 01:31 AM
    binomial model, genralized linear models, model checking, proportions
    • Replies: 0
    • Views: 1,979
    12-10-2013, 01:31 AM Go to last post
  53. Price endogeneity

    Hi experts, I am trying to make a demand model for hotel rooms using OLS regression. I got booking data for my hotel for 4 years and have the...

    Started by chillpill2007‎, 12-06-2013 07:23 PM
    • Replies: 2
    • Views: 1,467
    12-09-2013, 01:08 PM Go to last post
  54. Interpreting the regression coefficient for the change in a logged variable

    Dear TalkStats members, I need help interpreting a coefficient in a regression model I have encountered. The model looks as follows and is...

    Started by nurmran‎, 12-07-2013 02:34 PM
    • Replies: 0
    • Views: 1,390
    12-07-2013, 02:34 PM Go to last post
  55. Inverse prediction from Binary Logistic Regression

    Hi! I was wondering how to get the inverse prediction from Binary Logistic Regression, that is calculating x (and CIs) given p. Now, I know that x...

    Started by gianmarco‎, 12-05-2013 04:40 AM
    • Replies: 3
    • Views: 6,012
    12-06-2013, 05:40 PM Go to last post
  56. Question Regressing regression coefficients against other sets of data

    Hi guys A bit of a background. I am a trader by profession and have moderate knowledge of stats. I am building a model which prices a futures...

    Started by MoneyTree‎, 12-06-2013 11:48 AM
    model, nelson siegel, regression
    • Replies: 2
    • Views: 1,938
    12-06-2013, 12:58 PM Go to last post
  57. Is it possible to convert cross sectional data to panel data

    Hi All, I am relatively new to stata. Is it possible to convert cross sectional (survey) data to panel data with Stata? Thanks in advance

    Started by Windows7‎, 12-05-2013 11:26 PM
    • Replies: 0
    • Views: 1,331
    12-05-2013, 11:26 PM Go to last post
  58. I need regression help

    I don't need anyone to do my work for me. But I am totally confused. I've read my andy field chapter. My mind is boggled. I'm struggling on how...

    Started by rubyred89‎, 12-05-2013 12:06 PM
    • Replies: 1
    • Views: 1,478
    12-05-2013, 05:13 PM Go to last post
  59. Fixed effects regression and regression towards the mean

    Hi, i use linear fixed effects models to analyze panel data. The dependent variable is a sum score for mental health. Independent variable are...

    Started by Bjoern_Soc‎, 12-05-2013 02:08 AM
    • Replies: 2
    • Views: 1,446
    12-05-2013, 05:15 AM Go to last post
  60. Linear Regression and Linear Algebra

    It's been years since my (intro) linear algebra course, so I'm unsure of this. If I perform a multiple linear regression that included indicator...

    Started by APOCooter‎, 12-04-2013 10:24 PM
    • Replies: 2
    • Views: 1,721
    12-04-2013, 10:34 PM Go to last post

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