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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. using a binary response for a mixed model

    Hello, My journey through mixed models (which is documented in past questions) has been an arduous one, however I appreciate being introduced to...

    Started by Dragonwalker‎, 03-25-2012 01:01 PM
    mixed-models binary lme4
    • Replies: 0
    • Views: 790
    03-25-2012, 01:01 PM Go to last post
  2. Panel Data (Random or Fixed)

    The r = a +bx. is the model There is data for 3 time periods. Are there fixed effects present? Estimate the parameters a and b. The code below...

    Started by samulleg364‎, 03-24-2012 06:45 PM
    • Replies: 0
    • Views: 932
    03-24-2012, 06:45 PM Go to last post
  3. Conditional regression

    Hi all, I am trying to run explanatory regression: Y = alpha + Beta1*X*I{X.*Y>0}+Beta2*X*I{X.*Y<=0} where I{} is indicator function Since...

    Started by JustinasBr‎, 03-24-2012 05:35 PM
    conditional regression, dependent variable on rhs
    • Replies: 2
    • Views: 1,496
    03-24-2012, 05:49 PM Go to last post
  4. Best way to control for weekdays when regressing sales data against time.

    I'm trying to use multiple regression to model sales data per day since Jan 1, 2010. I have established a "time index" to facilitate this. So...

    Started by machinist‎, 03-23-2012 11:21 AM
    • Replies: 2
    • Views: 1,345
    03-24-2012, 05:49 PM Go to last post
  5. Production function CES or Cobb-Douglas

    The data y v1 v2 p w1 w2 is data for the estimation of a production function y = f(v1 ,v2). Is Cobb-Douglas or CES? Estimate the parameters. (p=...

    Started by samulleg364‎, 03-24-2012 05:19 PM
    • Replies: 0
    • Views: 1,901
    03-24-2012, 05:19 PM Go to last post
  6. Random Effects Model and Serial Correlation

    I am working on a model where I am using a random effects model. This might seem like a simple question but does the use of the random effects model...

    Started by ohjosr‎, 03-24-2012 10:13 AM
    • Replies: 0
    • Views: 799
    03-24-2012, 10:13 AM Go to last post
  7. p-value of anova when comparing models

    I am asking a new question, however the dataset is related to other questions that I have posted. I am running lmer to determine which factors have...

    Started by Dragonwalker‎, 03-24-2012 09:59 AM
    • Replies: 0
    • Views: 1,052
    03-24-2012, 09:59 AM Go to last post
  8. multiple linear regression rejected - searching for alternative model

    Hey there! I am currently working on a regression model for a logistics problem which includes the transport time as dependent variable and a...

    Started by evident‎, 03-16-2012 09:54 AM
    • Replies: 1
    • Views: 1,086
    03-21-2012, 11:29 PM Go to last post
  9. I think I may finally understand, but a few questions

    Please note that you will find a simplified question below in case you do not have the time to check all of my scripts in the first two posts, but...

    Started by Dragonwalker‎, 03-20-2012 11:18 AM
    mixed-effects aic
    • Replies: 6
    • Views: 1,106
    03-21-2012, 12:28 PM Go to last post
  10. Post which regression analysis model shall i use?

    i am conducting a research on 9 insurance companies from which a 5 year data is collected. Thus, i have to use panel model, but which model fixed...

    Started by asamnew‎, 03-21-2012 04:55 AM
    • Replies: 0
    • Views: 794
    03-21-2012, 04:55 AM Go to last post
  11. Interpreting the conclusion of t-test and explaining the p-value

    Hi, I'm working on an assignment which asks me to interpret the conclusion of my t-test regarding the average reading score and the student teacher...

    Started by shle‎, 03-21-2012 02:13 AM
    • Replies: 0
    • Views: 3,991
    03-21-2012, 02:13 AM Go to last post
  12. Regress y on y-hat

    I need some help to prove that when you regress y on y-hat, the least squares regression line is y = y-hat. y = 0 + 1(y-hat). Thanks!

    Started by jwdzurik‎, 03-20-2012 02:49 PM
    • Replies: 0
    • Views: 1,195
    03-20-2012, 02:49 PM Go to last post
  13. Back-calculating correlation coefficient for transformed data

    Hi everyone, This is my first post on this board so please excuse if I sound like a n00b. I am doing a meta-analysis on plant physiology studies,...

    Started by qdread‎, 03-20-2012 01:08 PM
    • Replies: 0
    • Views: 1,320
    03-20-2012, 01:08 PM Go to last post
  14. Plotting

    Is there any way to plot a normal distributions density tilted on its side along the regression line of a simple linear regression. Meaby just 3-5...

    Started by thedreamshaper‎, 03-19-2012 05:14 PM
    • Replies: 2
    • Views: 1,178
    03-20-2012, 08:57 AM Go to last post
  15. Transforming dependent variable

    I am using a multiple regression with one continuous DV and 9 IVs (mainly categorical and one continuous). My DV, as the mean score on a...

    Started by judith_sw‎, 03-19-2012 08:10 AM
    • Replies: 3
    • Views: 3,785
    03-20-2012, 07:17 AM Go to last post
  16. Mediation question

    If you want to test the hypothesis that the gender difference in brooding will account for the gender difference in anxiety, what would be my...

    Started by pinkk‎, 03-18-2012 10:28 AM
    • Replies: 1
    • Views: 903
    03-18-2012, 04:13 PM Go to last post
  17. xtlogit coefficient interpretations

    I'm working on a project where I am using a logit model in the program Stata. I'm using the xtlogit command with panel data for city and years. My...

    Started by ohjosr‎, 03-17-2012 01:46 PM
    • Replies: 0
    • Views: 2,030
    03-17-2012, 01:46 PM Go to last post
  18. Coefficients of delta-lognormal modeling

    I am trying to understand delta-lognormal modeling. Please bear with me. I am applying this method to some fishery data. This method combines...

    Started by elopomorph‎, 06-25-2011 06:27 PM
    delta lognormal
    • Replies: 2
    • Views: 2,805
    03-16-2012, 11:38 AM Go to last post
  19. plotting moderation

    Hi, I know that for most of you this will sound like a stupid question but I am teaching myself regression and I am quite new.. Does it make sense...

    Started by Sciarada‎, 07-02-2011 09:25 PM
    moderation plot, multinomial regression
    • Replies: 1
    • Views: 2,355
    03-16-2012, 09:30 AM Go to last post
  20. Help! model comparison in logistic regression

    Dear all, I'm working on a logistic regression and have now obtained two competing models (one computed by hand, the other with "step" in R). In...

    Started by caro‎, 03-15-2012 06:31 AM
    • Replies: 3
    • Views: 1,953
    03-16-2012, 03:17 AM Go to last post
  21. question on complete confounding and partial confounding in multiple regression

    While learning multiple regression, I once meet the concepts of “complete confounding” and “partial confounding” In the model, the response...

    Started by winecoding‎, 03-15-2012 10:37 PM
    • Replies: 2
    • Views: 3,887
    03-15-2012, 10:49 PM Go to last post
  22. When to address regression diagnostics on residuals?

    Hi, I have some data and have run a regression with all the variables in. I have then run the residual diagnostics but there are some issues. ...

    Started by regression_is_cool‎, 03-11-2012 08:44 AM
    • Replies: 1
    • Views: 1,173
    03-14-2012, 05:08 PM Go to last post
  23. 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: 11,046
    03-14-2012, 10:57 AM Go to last post
  24. Help! Deriving a support vector machine

    Given a training set of points not necessarily linearly separable, we have an SVM obtained by minimizing \frac{1}{2}\lambda \left \| \mathbf{w}...

    Started by spidercano‎, 03-13-2012 08:33 PM
    • Replies: 0
    • Views: 1,007
    03-13-2012, 08:33 PM Go to last post
  25. Multiple logistic regression intercept

    Hello guys and gals, I'm having a me***own trying to understand exactly what the intercept of a multiple logistic regression is telling me/ or if...

    Started by drewmac‎, 01-19-2012 12:40 AM
    • Replies: 3
    • Views: 2,434
    03-13-2012, 12:29 AM Go to last post
  26. Regression with continuous and dummy-coded categorical variables

    Hi everyone, I am trying to figure out differences in the proportions of fallen trees in three ZONES, and nested within ZONES, differences in...

    Started by lken‎, 03-12-2012 06:14 PM
    • Replies: 0
    • Views: 1,327
    03-12-2012, 06:14 PM Go to last post
  27. growth regression results

    I am doing a standard neoclassical growth regression for the European member states for the period 1991-2010. I regress GDP per capita growth on...

    Started by tedylov‎, 03-12-2012 06:02 PM
    • Replies: 0
    • Views: 957
    03-12-2012, 06:02 PM Go to last post
  28. 1 predictor, 2 different values for baseline statistic & change statistic?

    Hi, I am conducting a Cox Regression for my first time. I created a simple model with only 1 predictor (categorical), one dependent variable...

    Started by unipsychologist1‎, 03-12-2012 04:09 PM
    change score, chi-sqaured, cox, survival analysis
    • Replies: 0
    • Views: 900
    03-12-2012, 04:09 PM Go to last post
  29. Regression on sales,markdown,avgstock

    OUTPUT 1: Call: lm(formula = TySalesUnit ~ TyMarkdown + TyAvgStockUnit) Coefficients: t value Pr(>|t|) ...

    Started by masarimk‎, 03-12-2012 06:46 AM
    • Replies: 0
    • Views: 1,017
    03-12-2012, 06:46 AM Go to last post
  30. The standardized and non standardized coefficients gives diff results

    Hi. Some coworkers ran a regression and used first the beta to analyze the strength of the independent variables in a regression. However all the...

    Started by Kframnes‎, 03-09-2012 04:28 PM
    • Replies: 7
    • Views: 4,032
    03-09-2012, 05:21 PM Go to last post
  31. Binomial regression with x as the dependent variable and n as an independent variable

    Hi all I have a sample size of 100. Out of 100 a certain number are successful at stage one. Of those successful at stage one some are successful...

    Started by emily.stats‎, 03-05-2012 04:24 PM
    2 Pages
    1 2
    binomial, challenge
    • Replies: 15
    • Views: 2,811
    03-08-2012, 05:59 PM Go to last post
  32. warning at logistic reg.

    Hello, I am trying to do logistic regression analysis. The problem I face is that this warning comes out in my output : Due to redundancies,...

    Started by elpaki‎, 03-08-2012 06:51 AM
    • Replies: 0
    • Views: 1,606
    03-08-2012, 06:51 AM Go to last post
  33. Binary DV and orthogonal contrasts

    HEEEEEEEEELLLLPPPPPP!!!!! The data I am trying to analyse has a binary dependent variable (1=yes, 0=no) and tow factors. Factor 1 is a treatment...

    Started by matteovisentin‎, 03-08-2012 04:53 AM
    binary data, categorical data, contrasts, genlin
    • Replies: 0
    • Views: 1,112
    03-08-2012, 04:53 AM Go to last post
  34. Unhappy Single parent-offspring regression

    Does anyone know how to do this? I can't find the web page I found with the full explanation:shakehead Failing that, I am carrying out a study...

    Started by charlotte22‎, 03-08-2012 03:03 AM
    • Replies: 0
    • Views: 1,919
    03-08-2012, 03:03 AM Go to last post
  35. Categorical variables - Logistic regression

    Hello, I am trying to run a logistic regression model. I have 4 numeric and 1 categorical variable which are significant. The categorical...

    Started by nikhil_s‎, 03-07-2012 10:38 AM
    binning, categorical data analysis, categorical vairable, logistic regression
    • Replies: 5
    • Views: 2,709
    03-07-2012, 02:06 PM Go to last post
  36. Moderation, GLM, and interactions. Discrepent results...

    Hello all, I'm running a GLM to test for moderation. One of my interaction terms (the product of two continuous variables) looks suspicious......

    Started by cellardoor.‎, 03-06-2012 07:04 PM
    • Replies: 0
    • Views: 1,417
    03-06-2012, 07:04 PM Go to last post
  37. Interaction terms between correlated predictors

    Hello, I'm trying to test how the amount of native forest in a landscape affects the number of bird species, and how this relationship varies with...

    Started by souffle‎, 03-01-2012 09:55 PM
    • Replies: 2
    • Views: 1,806
    03-06-2012, 06:12 PM Go to last post
  38. Need help understanding an equality associated with regression analysis

    Hi everyone, I am attempting to understand the implications the equality listed below has in regards to regression models. The equality is...

    Started by phightins530‎, 03-06-2012 02:13 PM
    • Replies: 4
    • Views: 1,173
    03-06-2012, 04:20 PM Go to last post
  39. Is Slope A statistically different from Slope B? *URGENT*

    Hey everyone, Really need urgent help here. I am trying to determine if the change in the slope of a line (beta) is statistically significant...

    Started by explicit‎, 03-06-2012 01:25 AM
    • Replies: 7
    • Views: 19,132
    03-06-2012, 11:39 AM Go to last post
  40. Does fitting of a regression line as such contribute to mass significance?

    Is the fitting of a regression line (least squares, for a given number of predictors) as such to be regarded a statistical test that can contribute...

    Started by Bassler‎, 03-06-2012 05:04 AM
    false positives, fitting a line, least squares, mass significance, regression line
    • Replies: 0
    • Views: 871
    03-06-2012, 05:04 AM Go to last post
  41. Semi-saturated Fixed Effects

    Today my supervisor instructed me to try to use semi-saturated Fixed Effects analysis. I have tried searching for "semi-saturated" and "saturated"...

    Started by Laco‎, 03-01-2012 01:07 PM
    • Replies: 4
    • Views: 1,828
    03-04-2012, 01:15 PM Go to last post
  42. Urgent Help required: How to calculate linear predictor x in this table?

    Dear All, Please help

    Started by graced‎, 03-03-2012 07:56 AM
    • Replies: 5
    • Views: 1,412
    03-04-2012, 12:32 AM Go to last post
  43. Logistic Regression

    Hi, I am using R. For example, Y=β0 + β1X1+ β2X2 = log (a/(1-a)) where a = probability >g1<-glm(Count~X1+X2,family="binomial")...

    Started by paxy‎, 02-29-2012 02:40 AM
    • Replies: 1
    • Views: 896
    03-02-2012, 04:39 PM Go to last post
  44. Fixed Effects and interaction terms

    I am trying to analyze sex difference in housework time using longitudinal data with Fixed Effects. Since, sex is time-invariant I can not...

    Started by Laco‎, 03-01-2012 05:33 PM
    • Replies: 2
    • Views: 5,837
    03-01-2012, 06:01 PM Go to last post
  45. log linear model for dependence

    Hi I fitted a log linear model (proc genmod dist=negative binomial link=log) to see any dependence/association between 3 categorical variables. I...

    Started by szm‎, 02-29-2012 10:31 AM
    count, dependence, log linear, poisson regression
    • Replies: 2
    • Views: 1,234
    02-29-2012, 02:53 PM Go to last post
  46. Regression table interpretation problem

    Hello all, I am a complete beginner in statistics but I have come across a table I need to interpret for my research. Although it's probably a...

    Started by Nebounette‎, 02-28-2012 04:54 PM
    • Replies: 8
    • Views: 2,467
    02-29-2012, 09:58 AM Go to last post
  47. Cool Sequential Logit Model (Hurricane Evacuations)


    Started by tenki‎, 02-28-2012 02:10 PM
    • Replies: 0
    • Views: 839
    02-28-2012, 02:10 PM Go to last post
  48. Angry Multiple regression, removing very small coefficients

    Hello, I did 'backwards method' multiple regression in SPSS to predict 'energy'. The R^2 value is 0.951. Here is the final output model of the...

    Started by bradyj2‎, 02-28-2012 08:43 AM
    • Replies: 1
    • Views: 2,174
    02-28-2012, 11:42 AM Go to last post
  49. Regression Help! to predict performance using the output of questionaire

    Hi All, Somebody pl. helpe me in the brlow case, As a part of academic project, im intrested in measuring performance of purchase dpeartment in a...

    Started by Arjun‎, 02-22-2012 05:08 AM
    multiple regression, regression analysis
    • Replies: 13
    • Views: 1,919
    02-28-2012, 01:12 AM Go to last post
  50. Articles/information on robust regression?

    Hi, I am a little confused as to what methods there are for "robust" regression. I thought it was an actual type (as in logistic, linear, etc),...

    Started by statn00b‎, 02-23-2012 09:05 AM
    • Replies: 5
    • Views: 1,533
    02-26-2012, 07:32 PM Go to last post
  51. how many time dummies in pooled regression?

    Hi guys, I want to perform a cross sectional time series regression - fixed effects model. Am I correct that it is better to group time by time...

    Started by SylviaS‎, 02-23-2012 08:44 AM
    • Replies: 2
    • Views: 2,709
    02-26-2012, 06:43 PM Go to last post
  52. Is this an instance of simultaneity? Can you help me understand why?

    I cant seem to figure this out, as standard descriptions of simultaneity in econometrics textbooks don't quite seem to fit. 1. I have panel data...

    Started by andrewcd‎, 02-24-2012 10:45 PM
    • Replies: 0
    • Views: 1,043
    02-24-2012, 10:45 PM Go to last post
  53. multivariate logistic regression

    Hello, I need to perform multivariate logistic regression on 3 binary variables. My independent variables are also categorical (3-10 levels)...

    Started by szm‎, 02-23-2012 07:38 PM
    logistic regression, multivariate, multivariate logistic reg, sas
    • Replies: 1
    • Views: 1,607
    02-24-2012, 10:09 AM Go to last post
  54. Stats Help Regression

    Hi, Do you know what kind of regression tests I should run for this and how to run them? Thanks for your help. Attached is the file.

    Started by baller99‎, 02-23-2012 04:40 PM
    • Replies: 4
    • Views: 1,108
    02-23-2012, 06:36 PM Go to last post
  55. Regression of Conditional Expectations E[Y|X,Z=z] = f(E[X|Z=z])

    Hello all, I have a regression problem I'm interested in that seem like it should be a fairly common and well understood, but due to my weak...

    Started by NITHOS‎, 02-23-2012 01:12 PM
    • Replies: 0
    • Views: 977
    02-23-2012, 01:12 PM Go to last post
  56. Regression on Composite Rates

    I have what may be a simple question, but I have been unable to find an appropriate methodology, and I am hoping that one of you may be able to help....

    Started by BrandonB‎, 02-22-2012 06:26 PM
    • Replies: 0
    • Views: 1,321
    02-22-2012, 06:26 PM Go to last post
  57. Interpreting mean centered polynomial regression

    Hi, I'm running a simple OLS regression and want to examine non-linear effects. Therefore I have included a square term of the independent...

    Started by economix‎, 02-21-2012 02:56 PM
    • Replies: 0
    • Views: 2,111
    02-21-2012, 02:56 PM Go to last post
  58. Number of Observations Question

    I am currently completing a research project on a certain type of fund. I would like to conduct a time series. It is my aim to analyse the...

    Started by Student_Researcher‎, 02-21-2012 11:47 AM
    number of observations
    • Replies: 0
    • Views: 1,006
    02-21-2012, 11:47 AM Go to last post
  59. Regression on Counts

    Hi, I have data on number of laps mice have run over several days after an injection (simulate injury) and receiving one of two treatments...

    Started by ted‎, 02-14-2012 01:29 PM
    • Replies: 7
    • Views: 1,626
    02-20-2012, 04:09 PM Go to last post
  60. Question Ordered Logit Model

    Using the World Values Survey (http://www.wvsevsdb.com/wvs/WVSData.jsp), I am trying to run an ordered logit model on a continuous dependent variable...

    Started by toddsqui‎, 02-19-2012 05:14 PM
    • Replies: 1
    • Views: 1,372
    02-20-2012, 12:48 PM Go to last post

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