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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Question Controlling for time

    Hello, Thank-you for taking the time to read this post. I have managed to get myself very confused about what is (hopefully) quite a simple...

    Started by CathyK‎, 10-16-2017 08:15 AM
    control variable, logistic regression
    • Replies: 0
    • Views: 60
    10-16-2017, 08:15 AM Go to last post
  2. Controlling mediation effect in a binary logistic regression

    Hi everbody, It's my first post and I hope I posted in the right forum. In my master thesis I use binary logistic regression: a dichotomous...

    Started by Frodofroehlich‎, 03-24-2015 01:19 PM
    • Replies: 2
    • Views: 2,811
    03-24-2015, 03:14 PM Go to last post
  3. Contructing an econometrics project

    Hi guy. I'm doing a econometrics project and I have been given a task to find out what factors determine the male wage. I have been given a lot...

    Started by 00mirshahia‎, 04-03-2013 03:19 PM
    • Replies: 3
    • Views: 1,850
    04-06-2013, 10:01 PM Go to last post
  4. Converting a continuous variable into a categorical variable (low, medium, high)

    I have a continuous dependent variable (scores on an exam) and a number of predictor variables that I'd like to use in a regression analysis, such as...

    Started by tess2‎, 10-17-2017 12:08 AM
    categorical, percentiles, regression
    • Replies: 4
    • Views: 159
    10-17-2017, 10:43 AM Go to last post
  5. Converting Group Centroids into Original Measurement Units in DFA

    I used SPSS to perform a discriminant function analysis on leg length which I am using to differentiate males and females in my sample. New measures...

    Started by ckevinbarrett‎, 01-25-2012 12:34 PM
    centroids, cut-off, dfa, discriminant, mahalanobis
    • Replies: 2
    • Views: 2,075
    01-25-2012, 12:54 PM Go to last post
  6. Converting nominal dependent to interval variables through use of dummy variables

    Dear all, My research involves the independent interval variable of Socio-Economic Status (SES), the ordinal independent variable of self-efficacy...

    Started by GDP9‎, 03-26-2014 01:18 PM
    • Replies: 5
    • Views: 1,607
    03-27-2014, 11:41 AM Go to last post
  7. Cook distance and leverage

    I have a data point for which leverage value is > 3(p+1)/n but the value of cook's distance is < 1. Can i say that, this is an outlier but it is...

    Started by sach_83‎, 01-02-2011 04:37 AM
    • Replies: 1
    • Views: 5,554
    01-02-2011, 07:33 PM Go to last post
  8. Cook's distance for nonlinear regression

    Cook's distance was used to detect outliers in a linear regression model. But is it ok to use it with non-linear regression model?

    Started by khara‎, 02-17-2013 06:58 PM
    • Replies: 0
    • Views: 3,525
    02-17-2013, 06:58 PM Go to last post
  9. Cook's Distance on WLS?

    I am working with clustered data in R and am running a weighted least squares regression, weighting based on the number of elementary units in the...

    Started by new123‎, 07-20-2012 03:11 PM
    • Replies: 0
    • Views: 1,483
    07-20-2012, 03:11 PM Go to last post
  10. 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: 10,473
    08-08-2014, 10:18 PM Go to last post
  11. Corporate Governance Explanations effects on Firm Value

    Hi all, I'm quite new to statistics and need some guidance for my dissertation. The University is messing up with my supervisor resulting in me...

    Started by Vislian‎, 06-23-2015 09:54 AM
    • Replies: 1
    • Views: 2,680
    07-08-2015, 08:51 AM Go to last post
  12. Correct interpretation of Lmer output

    I have produced the following model ...

    Started by JonoBone‎, 04-19-2013 10:05 AM
    interaction, mixed effects, random effects, regression
    • Replies: 0
    • Views: 3,978
    04-19-2013, 10:05 AM Go to last post
  13. correct regression model for dependent variable

    Hi all, I am new to this forum and I hope that the qestions that are bothering me can be answered together with your help. I have data (N=220)...

    Started by andik‎, 01-19-2015 09:33 PM
    • Replies: 11
    • Views: 2,367
    02-12-2015, 08:47 AM Go to last post
  14. Question Correct statistical test to use for my data (correlation/regression)

    Hello everyone, Potentially a silly question (but I am new to all of this): I have collected data from a focal animal study on Naked mole-rats....

    Started by Naked.Mole.Rat‎, 03-13-2015 06:13 AM
    • Replies: 0
    • Views: 1,103
    03-13-2015, 06:13 AM Go to last post
  15. Correct structuring of random effects?

    Hi I have produced a mixed effects model as follows; lmer(TotalPayoff~Type+Game+PgvnD*Asym+(1|Subject)+(1|Pairing),REML=FALSE,data=table1)- ...

    Started by JonoBone‎, 04-19-2013 09:27 AM
    mixed model, random effects, regression
    • Replies: 0
    • Views: 1,254
    04-19-2013, 09:27 AM Go to last post
  16. Correcting for endogeneity a panel count model with interactions using IV approach

    Hello dear forum members, My study examines the impact of online (a) reputational status, and (b) reviews on physicians’ performance, as proxied...

    Started by kiton‎, 07-25-2015 09:52 AM
    endogeneity, instrumental variables, interaction terms, panel count model
    • Replies: 0
    • Views: 1,291
    07-25-2015, 09:52 AM Go to last post
  17. Correcting for omitted variable bias without including problem variables?

    Hi All, I asked something similar earlier but I don't think I was very clear (so I will try again). I want to run a regression, let's say it is...

    Started by Salohcin‎, 06-26-2013 01:12 PM
    • Replies: 3
    • Views: 4,195
    06-26-2013, 02:55 PM Go to last post
  18. Correcting for regression to the mean in mixed effects model of longitudinal data?

    Hey everyone, I know you can correct for regression to the mean for two time points, in a before and after scenario. But does anyone know how to...

    Started by imahumaneater‎, 09-21-2015 02:35 PM
    correlation, longitudinal data, mixed effects, random effects, regression to the mean
    • Replies: 0
    • Views: 1,637
    09-21-2015, 02:35 PM Go to last post
  19. Correcting lack of fit

    I have a very simple data set with a single regressor that has all negative values. The data set provides no context, only values. When testing...

    Started by zicke01‎, 10-20-2012 03:18 PM
    • Replies: 4
    • Views: 2,051
    10-21-2012, 02:01 PM Go to last post
  20. Correlating two pitch contour models

    I am determining tonal ability (the ability to express tones in a tone language, a language which requires a change in pitch to differentiate meaning...

    Started by jkao1‎, 04-28-2017 03:21 PM
    • Replies: 0
    • Views: 815
    04-28-2017, 03:21 PM Go to last post
  21. Correlation

    Hi! I was wondering if someone could give me some help. I am struggeling to understand how to run my correlation analysis using SPSS This is my...

    Started by Kate10‎, 08-16-2010 03:49 PM
    • Replies: 6
    • Views: 2,752
    08-17-2010, 08:44 AM Go to last post
  22. Correlation

    Is it possible to correlate two categorical variables? I have a data on building homes in different cities. I want to show correlation on how...

    Started by amanp786‎, 02-08-2014 07:31 PM
    • Replies: 2
    • Views: 1,263
    02-09-2014, 01:39 AM Go to last post
  23. Correlation among a paired multiple vairable for a special case

    Hi all, I've run into a stats problem that I can't figure out. I have a pair of linked variables (x,y) that I want to correlate with a third...

    Started by willct‎, 08-06-2017 07:22 AM
    • Replies: 1
    • Views: 274
    08-07-2017, 06:41 PM Go to last post
  24. Correlation and Multiple Regression

    Can you please help me understand the following questions - 1. Looking at correlations and scatterplots how can we determine if multiple regression...

    Started by raamaak‎, 04-23-2011 03:32 AM
    • Replies: 0
    • Views: 1,714
    04-23-2011, 03:32 AM Go to last post
  25. Correlation and regression

    Hello, it would be nice if you could provide the appropriate theoretical steps for the following task: There is a shop which also operates a pub....

    Started by DZ8‎, 01-30-2016 08:00 AM
    • Replies: 0
    • Views: 1,027
    01-30-2016, 08:00 AM Go to last post
  26. Correlation and Regression Assignment Using BRFSS

    "For this assignment you must collect some state-level variable of your choice and merge it to the BRFSS individual-level data (matching by state...

    Started by littlebee‎, 10-13-2010 09:28 PM
    • Replies: 0
    • Views: 2,791
    10-13-2010, 09:28 PM Go to last post
  27. Correlation between four parameters

    Dear memebers, I need to make correlation between four parameters; how can I do it and by which outil it's possible? Can someone please tell me...

    Started by sld312‎, 10-20-2013 08:12 AM
    • Replies: 1
    • Views: 2,147
    10-20-2013, 12:32 PM Go to last post
  28. Correlation between predictive variables in multiple regression

    I have several response variables which are explained by many different explanatory variables. I have one value for each day for each variable, both...

    Started by steffdov‎, 06-14-2011 08:40 AM
    • Replies: 1
    • Views: 2,130
    06-22-2011, 01:46 PM Go to last post
  29. Correlation between reaction time (RT) and accuracy.

    In a two choice task, for each participant, I want to show that the faster is RT, the higher is the probability for incorrect response. Is it...

    Started by Izek‎, 12-24-2011 09:38 AM
    • Replies: 3
    • Views: 4,082
    12-24-2011, 01:23 PM Go to last post
  30. Smile Correlation between two non stationary time series

    Hey everyone, I'm trying to figure out if there is significant correlation between two non stationary time series (e.g. temperature on a a given...

    Started by s_chrodinger‎, 07-28-2014 05:51 PM
    correlation, monte carlo, non-stationary, regression analysis, time series
    • Replies: 9
    • Views: 3,979
    08-01-2014, 02:03 PM Go to last post
  31. Question Correlation coeffcient

    I have no idea where to begin with this. If someone could guide me into the right direction, please. If the correlation coefficient is 0.97, what...

    Started by jamjammuffin‎, 03-05-2011 08:44 AM
    • Replies: 1
    • Views: 3,070
    03-05-2011, 09:23 AM Go to last post
  32. Correlation Coefficient

    Suppose X is transformed to cX, and Y is transformed to dY where c and d are constant, what happens to the correlation coefficient?? Is it...

    Started by hsian90‎, 10-14-2011 04:50 AM
    • Replies: 0
    • Views: 1,705
    10-14-2011, 04:50 AM Go to last post
  33. Correlation coefficients as a variable in a multiple regression?

    Hi I would like to do a multiple regression using correlation coefficients as my dependent variable - is this possible? Specifically the...

    Started by Lizzie_Liz‎, 01-26-2010 11:33 AM
    • Replies: 1
    • Views: 3,855
    02-02-2010, 10:35 PM Go to last post
  34. Correlation for a sample with constant dependent variable

    Hello everyone, I hope I got the right subforum! I would really appreciate if someone takes the time to help me and guide me into th right...

    Started by Subra‎, 09-03-2015 09:11 AM
    • Replies: 0
    • Views: 1,457
    09-03-2015, 09:11 AM Go to last post
  35. Correlation for Binary Target Variable

    Hi, Just need someone to do a sanity for me. In linear regression, one might want to transform (log, power, etc...) a continuous independent...

    Started by Oberon‎, 02-03-2016 12:01 AM
    • Replies: 0
    • Views: 959
    02-03-2016, 12:01 AM Go to last post
  36. Correlation for different level of volatility

    Hi, I need to estimate correlation between 2 variables across quantiles of volatility (volatility is an independent variable).. I want to show how...

    Started by Nour‎, 09-09-2014 11:37 AM
    • Replies: 0
    • Views: 1,392
    09-09-2014, 11:37 AM Go to last post
  37. correlation in multi-level model

    In a multi-livel model where level 1 is within-person and level 2 is between-person, can level 1 be a simple correlation between two within-person...

    Started by ecnusbau‎, 10-23-2015 11:46 AM
    • Replies: 2
    • Views: 1,053
    10-23-2015, 01:40 PM Go to last post
  38. correlation of trends?

    Hi, I have extracted trends from two time series (one correspond to some climate parameters, the other one to chemical composition of tree...

    Started by Valido‎, 07-23-2014 03:34 AM
    • Replies: 1
    • Views: 3,184
    07-27-2014, 04:11 PM Go to last post
  39. Correlation test for PCA

    Hello, I have done two independent PCA (Principal component analysis) with two different datasets in R. I have made interpolated geographic maps...

    Started by Thiho‎, 01-29-2013 08:27 AM
    correlation analysis, pca
    • Replies: 0
    • Views: 1,436
    01-29-2013, 08:27 AM Go to last post
  40. Correlation VS linear regression using proportional data

    Hi, I was hoping someone may be able to assist. I have discussed this with two people who understand a great deal about stats, although I read...

    Started by jonpaul31‎, 09-28-2016 11:52 AM
    • Replies: 0
    • Views: 3,136
    09-28-2016, 11:52 AM Go to last post
  41. 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: 1,917
    12-28-2013, 10:20 AM Go to last post
  42. Correlation with residuals of regression

    Hi all, Let's say I have one DV (X) and 5 IV's, A, B, C, D and E. I'm specifically interested in the effect of E. I could perform a regression...

    Started by AnLo‎, 11-04-2016 08:07 AM
    • Replies: 3
    • Views: 2,312
    11-07-2016, 10:18 AM Go to last post
  43. Question could not find the command for "logistic regression" under analyze in SPSS19

    I have been tryibg to do a logistic regression in SPSS 19. But somehow I could not find the option/command in the "regressions" section under...

    Started by BarryZheng‎, 08-29-2012 10:26 PM
    • Replies: 0
    • Views: 960
    08-29-2012, 10:26 PM Go to last post
  44. Could you help me understand my regression analysis?

    Hello All, I think i have a pretty good understanding of the 3 regression analysis that i've done. However, i just wanted to confirm them with some...

    Started by joshnathan‎, 03-14-2013 05:58 PM
    • Replies: 1
    • Views: 2,099
    03-15-2013, 10:04 AM Go to last post
  45. Count data independent variable

    I am going to run a regression using count data as independent variables, with the dependent variables being the amount of investment in . Given...

    Started by maltesedog‎, 05-13-2013 10:05 AM
    • Replies: 3
    • Views: 5,527
    05-13-2013, 10:32 AM Go to last post
  46. count data with no zero counts, Poisson?

    Well I appear to have zero deflate data. I will likely treat it as multilevel with clusters, but I was wondering if there was a count approach (e.g.,...

    Started by hlsmith‎, 12-19-2014 08:26 PM
    • Replies: 3
    • Views: 2,777
    12-19-2014, 10:45 PM Go to last post
  47. Country Variable

    Hi Stata Experts, I have a question concerning an idea for my thesis. I have firm-specific data (assets, sales, income etc.) for different firms...

    Started by corazon92‎, 10-11-2016 08:27 AM
    • Replies: 0
    • Views: 1,121
    10-11-2016, 08:27 AM Go to last post
  48. Country-level Clustering

    Hi All, I have a database on firms that went bankrupt/not bankrupt from 1999-2011 across 30+ countries. I have included year fixed effects in my...

    Started by lucas111‎, 10-29-2015 12:04 AM
    • Replies: 1
    • Views: 1,189
    10-29-2015, 02:34 AM Go to last post
  49. cov (yi, yi*)

    solved delete

    Started by vtstat56‎, 04-25-2014 09:59 PM
    covariance, least-squares, regression
    • Replies: 0
    • Views: 2,561
    04-25-2014, 09:59 PM Go to last post
  50. Cov in multiple linear regression

    For multiple linear regression model Y = Xβ + e, assume X is non-random. Assume Gauss-Markov assumptions hold. Show that variance-covariance matrix...

    Started by hanelliot‎, 06-19-2009 08:35 PM
    • Replies: 3
    • Views: 5,375
    06-19-2009, 09:32 PM Go to last post
  51. Covariance

    Hi, I'm studying econometrics and have been utterly swamped by this question. I have a set of statistics in the question. Mean of X, Mean of Y,...

    Started by SecretDuck‎, 04-11-2014 09:19 AM
    • Replies: 0
    • Views: 1,272
    04-11-2014, 09:19 AM Go to last post
  52. Covariance and Correlation for Regression Model

    I've been looking over some regression models lately and I came across one which, although similar, differs from the "standard" simple linear model....

    Started by Rupert‎, 10-30-2012 08:32 PM
    correlation, covariance, regression
    • Replies: 0
    • Views: 1,281
    10-30-2012, 08:32 PM Go to last post
  53. Question covariance and variance of BLUE

    Consider an RBD with 5 replications and 4 treatments t_1,t_2,t_3,t_4. We are given the following three treatment-contrasts: \frac{t_1-t_2}{2}...

    Started by Sambit‎, 06-10-2011 08:45 AM
    • Replies: 8
    • Views: 2,636
    06-12-2011, 11:13 AM Go to last post
  54. Covariance of residual

    I'm given the mutiple regression equation Y = XB + e I have to find the covariance between e_hat and Y First what I did was changed e_hat =...

    Started by Cookie‎, 09-03-2011 08:52 PM
    • Replies: 0
    • Views: 3,698
    09-03-2011, 08:52 PM Go to last post
  55. cox model with time dependent covariate

    I am trying to fit a cox model: h(t, beta) = h0(t)exp(X*beta), while X = (x1, x2, ..., xN) but, for instance, x1 is binary with value of 0 or 1,...

    Started by pepsico007‎, 02-20-2014 08:07 PM
    cox, hazard, model, survival analysis
    • Replies: 1
    • Views: 1,699
    02-20-2014, 11:37 PM Go to last post
  56. Cox PH regression on fixed-interval (1, 2, 5-year) survival

    Dear all, I am co-author on a manuscript on a study which follows a group of patients from a certain diagnosis and studies risk factors for...

    Started by maksler‎, 05-15-2014 05:42 AM
    cox proportional hazard, interval survival times, logistic regression, survival analysis
    • Replies: 0
    • Views: 1,369
    05-15-2014, 05:42 AM Go to last post
  57. Cox proportional hazard

    I am trying to understand how to interpret the change in the hazard function for a one unit change in a dummy predictor. I know for a continuous...

    Started by noetsi‎, 08-12-2014 11:06 AM
    • Replies: 3
    • Views: 1,703
    08-12-2014, 01:00 PM Go to last post
  58. cox regression

    I am new to this method, so I started this thread for questions on it. :p Some discussions of Cox treat it as a counting process and others do...

    Started by noetsi‎, 09-08-2014 08:35 AM
    • Replies: 4
    • Views: 2,187
    09-08-2014, 02:16 PM Go to last post
  59. cox regression

    This is interested in surival time to an event and deals with time series data inherently, including the use of lagging indicators in some cases....

    Started by noetsi‎, 01-20-2015 11:56 AM
    autocorrelation
    • Replies: 1
    • Views: 1,196
    01-25-2015, 03:01 PM Go to last post
  60. Cox Regression - time dependent

    Dear all, I have a question regarding the cox regression. I have conducted a dataset with Top50 Boxoffice Data for the U.S market. It contains...

    Started by martinki‎, 05-02-2016 07:25 AM
    • Replies: 3
    • Views: 2,076
    05-02-2016, 09:45 AM Go to last post

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