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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. 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 12:42 PM
    fixed effect, longitudinal data, mixed effect models, random effect
    • Replies: 0
    • Views: 1,061
    10-02-2014, 12:42 PM Go to last post
  2. 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 02:40 PM
    cross validation, linear regression, regression, regularization, tuning, tuning parameter
    • Replies: 6
    • Views: 1,427
    10-01-2014, 07:09 PM Go to last post
  3. 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 07:51 AM
    gbm, prediction interval, prediction limits
    • Replies: 2
    • Views: 841
    10-01-2014, 02:08 PM Go to last post
  4. 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 11:08 AM
    ordinal regression, regression analysis, regression coefficients
    • Replies: 0
    • Views: 874
    10-01-2014, 11:08 AM Go to last post
  5. 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 11:20 AM
    • Replies: 4
    • Views: 1,383
    10-01-2014, 03:57 AM Go to last post
  6. 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 09:22 AM
    • Replies: 0
    • Views: 702
    09-30-2014, 09:22 AM Go to last post
  7. 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 11:07 AM
    • Replies: 2
    • Views: 862
    09-30-2014, 04:37 AM Go to last post
  8. 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 02:41 PM
    non linear regression, validation
    • Replies: 1
    • Views: 793
    09-30-2014, 04:32 AM Go to last post
  9. 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, 09-28-2014 11:30 PM
    linear regression, probability
    • Replies: 0
    • Views: 616
    09-28-2014, 11:30 PM Go to last post
  10. 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 09:43 AM
    cross sectional, ols regression
    • Replies: 0
    • Views: 816
    09-27-2014, 09:43 AM Go to last post
  11. Linear Regression

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

    Started by DDD‎, 09-25-2014 01:56 PM
    • Replies: 4
    • Views: 1,292
    09-25-2014, 04:28 PM Go to last post
  12. Delogging variables

    Hey, I have run a multiple regression. DV is change in the log of assets Parameter Expected Sign Parameter (T stat) Chlnx ...

    Started by iloveireland‎, 09-25-2014 03:18 AM
    • Replies: 0
    • Views: 787
    09-25-2014, 03:18 AM Go to last post
  13. Scaling variables in regression

    If you need to scale variables in order to get the correct effect size and beta weight for each variable, does this mean you also scale for both...

    Started by bcrider‎, 09-24-2014 12:32 AM
    categorical data, r program, regression analysis, scaling
    • Replies: 3
    • Views: 1,303
    09-24-2014, 03:30 PM Go to last post
  14. Multinomial Logistic Regression

    I have run a multinomial logistic regression looking to see if being a member of two different groups predicts group membership to 5 categories. I...

    Started by mlb‎, 09-24-2014 05:26 AM
    goodness of fit, logistic regression, regression
    • Replies: 0
    • Views: 670
    09-24-2014, 05:26 AM Go to last post
  15. Pairwise logistic regression - which trait is the dependent trait?

    Hi All, Could someone explain the reasoning behind choosing the dependent trait in pairwise logistic regression of two categorical traits. My...

    Started by lel7lel7‎, 09-22-2014 08:11 PM
    binary dependent variable, logistic regression
    • Replies: 0
    • Views: 892
    09-22-2014, 08:11 PM Go to last post
  16. Bivariate with Normal Probability plots.

    This is more of a conceptual question for a problem that I'm working on. My professor is asking questions about normal probability plots and I can't...

    Started by SilverStars‎, 09-22-2014 04:20 PM
    • Replies: 0
    • Views: 667
    09-22-2014, 04:20 PM Go to last post
  17. Need help with Linear regression model

    Hi, Need help to develop a model for the data set. I have attached a copy of all the variables with their parameter estimates and the p value. ...

    Started by Shashank Prasad‎, 09-22-2014 01:44 PM
    • Replies: 0
    • Views: 623
    09-22-2014, 01:44 PM Go to last post
  18. Regression model advice: 1 continuous DV, 2 binary and 1 continuous IV

    Hi- I'm trying to build a model to forecast/predict a continous dependant variable based on several predicting variables. 1 of them is categorical...

    Started by kdedrick‎, 09-22-2014 11:22 AM
    • Replies: 0
    • Views: 905
    09-22-2014, 11:22 AM Go to last post
  19. Multivariate linear regression analysis (multiple dependent variable, one independent

    I am trying to determine the reason why(and how many) people with health insurance do not fully use all of its benefits(like free flu vaccines). I am...

    Started by p_s‎, 08-03-2014 11:18 PM
    6 Pages
    1 2 3 ... 6
    • Replies: 75
    • Views: 9,625
    09-21-2014, 06:00 AM Go to last post
  20. Overdispersions and logistic regression

    Note the following comment on this: I have never been clear what the difference between grouped and ungrouped data is. My elements, notably...

    Started by noetsi‎, 09-19-2014 09:26 AM
    • Replies: 8
    • Views: 1,710
    09-20-2014, 08:04 AM Go to last post
  21. Adjusted R-squared

    Hi, I have a few questions. If I am doing linear regression with only one independent variable, is it ever viable to present an adjusted...

    Started by haralds‎, 09-18-2014 01:57 PM
    bootstrap simulation, linear regression
    • Replies: 6
    • Views: 1,345
    09-19-2014, 09:55 PM Go to last post
  22. Testing whether two related slopes/intercepts are different from each other

    Hi, I'm new and stuck. I want to see if the intercepts and slopes of two linear regression lines are significantly different. I thought I found...

    Started by Proinsias‎, 09-18-2014 08:39 PM
    intercept, intercept p value, linear regression, mancova, significance
    • Replies: 10
    • Views: 1,764
    09-19-2014, 01:43 AM Go to last post
  23. how to calculate R values

    Hello members, I have no of observation (n), no of predictors(k) and stand error of estimation(se). Can it be possible to calculate R or RSquare...

    Started by sb1‎, 09-18-2014 07:47 AM
    • Replies: 1
    • Views: 761
    09-18-2014, 11:31 AM Go to last post
  24. Question Coefficient of determination interpretation

    Hey guys, this my first post in here so hello everyone:) I have a question regarding the coefficient of determination. Wikipedia says: An...

    Started by bgst‎, 09-09-2014 07:51 AM
    • Replies: 4
    • Views: 1,304
    09-17-2014, 04:58 PM Go to last post
  25. Assumption of Linearity not fulfilled - what to do?

    Dear All, I want to conduct a moderated hierarchical regression. I have 3 IVs and one moderator. I started to test the underlying assumptions of...

    Started by bluemuly‎, 09-17-2014 06:02 AM
    • Replies: 1
    • Views: 1,849
    09-17-2014, 02:53 PM Go to last post
  26. Help to prove the relationship of regression coefficients of total data and sub-data

    Hello, The regression of total data set is:Y=aX+b0 The total data set is divided to two data sets. The regressions of the two sub data sets are:...

    Started by Samuel1204‎, 09-15-2014 12:34 PM
    • Replies: 8
    • Views: 1,411
    09-16-2014, 11:44 PM Go to last post
  27. Geometric Slope

    I am reading a paper that in the "Methods", it is only stated multiple linear regression conducted. In the results it reports the "geometric slopes"...

    Started by hlsmith‎, 09-15-2014 11:29 AM
    • Replies: 2
    • Views: 823
    09-15-2014, 11:57 AM Go to last post
  28. Exclamation Interpretating poisson regression output correctly to wirte in results from R

    Hi. I've done a poisson regression on count data in r. I need to write up the results for it but have very little idea where to start because the p...

    Started by Francesca.123‎, 09-14-2014 07:13 AM
    glm regression, output, poisson, r-statisitcs, results
    • Replies: 0
    • Views: 1,135
    09-14-2014, 07:13 AM Go to last post
  29. Question Regression with 0 intercept

    Hi, I'm taking a regression analysis class and its been a while since I took calc (a few years ago) and Im having some trouble with doing proofs of...

    Started by SilverStars‎, 09-13-2014 02:06 PM
    • Replies: 3
    • Views: 1,074
    09-14-2014, 12:51 AM Go to last post
  30. regression or remosre??!!

    what are the differences between remorse and regression????????????????????

    Started by haraharae‎, 09-12-2014 12:51 PM
    • Replies: 8
    • Views: 1,276
    09-13-2014, 05:19 AM Go to last post
  31. Preliminary Analysis in MultiLevel Analysis

    Hallo there, my name is David. I am currently trying to do a multi level analysis. I am attempting a simple multilevel analysis. One of my...

    Started by David_D‎, 09-13-2014 03:33 AM
    • Replies: 0
    • Views: 700
    09-13-2014, 03:33 AM Go to last post
  32. Analytical solution to correlation between two linear combinations of values

    Greetings, Suppose I have two linear combinations of values as follows: Y1 = B11*X1 + B12*X2 + B13*X3 Y2 = B21*X1 + B22*X2 + B23*X3 where...

    Started by BigBugBuzz‎, 09-12-2014 03:39 AM
    analytical solution, correlation
    • Replies: 3
    • Views: 930
    09-12-2014, 02:00 PM Go to last post
  33. Smile Logistic regression vs GLMM

    Hello, I'd like to ask you for help with a choice of correct model for my analysis. Here is the problem: 1.) I should find out whether the risk of...

    Started by Heisenberg1‎, 09-11-2014 05:00 AM
    • Replies: 0
    • Views: 705
    09-11-2014, 05:00 AM Go to last post
  34. Smile non linear least squares

    Hi everybody. I need some help with this: I am fitting some data about mortality to some hazard funtions like weibulll, lognormal, logistic...

    Started by sanmath‎, 09-10-2014 09:33 PM
    #non linear least squares
    • Replies: 0
    • Views: 660
    09-10-2014, 09:33 PM Go to last post
  35. Choice of final model

    There are many strategies for selecting a final model (and which variables are in the final model will likely influence the SE and the coefficients)....

    Started by noetsi‎, 09-09-2014 10:12 AM
    • Replies: 11
    • Views: 1,582
    09-10-2014, 11:55 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: 787
    09-09-2014, 11:37 AM Go to last post
  37. Probability distribution of a prediction

    Hi all, I'm a newbie here so apologies if I missed a similar thread. Looked for it, but couldn't find it. Let's say I've estimated a linear model...

    Started by tetrapod‎, 09-09-2014 08:28 AM
    • Replies: 0
    • Views: 655
    09-09-2014, 08:28 AM Go to last post
  38. Question Interpretation of interaction variables

    Hi everyone I have two datasets A and B with mutually exclusive observations and I run two identical regressions (x = y) for A and B each...

    Started by gsgcharles‎, 09-08-2014 11:20 PM
    • Replies: 0
    • Views: 711
    09-08-2014, 11:20 PM Go to last post
  39. 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: 1,099
    09-08-2014, 02:16 PM Go to last post
  40. Poisson regression

    Hello, im analyzing an article for my studies with the hypothesis if a change in work motivation ist related with a change in mental well being...

    Started by mia maria‎, 09-08-2014 10:06 AM
    • Replies: 0
    • Views: 728
    09-08-2014, 10:06 AM Go to last post
  41. compare beta subgroup from total group - two dummy variables

    My plain regression looks as follows: tendaystockreturn = alpha + beta * dummy variable that takes a value of 1 in case a director purchases...

    Started by smoyf1992‎, 09-04-2014 01:42 PM
    dummy compare inter
    • Replies: 1
    • Views: 956
    09-04-2014, 01:47 PM Go to last post
  42. Simple Linear Regression with Transformed Variables

    I ran a simple linear regression (length of stay predicts cost). I natural log transformed both the dependent and independent variables. I am...

    Started by hlsmith‎, 09-02-2014 03:36 PM
    • Replies: 3
    • Views: 1,119
    09-03-2014, 05:49 AM Go to last post
  43. Supervised learning on sporting events (Data prep)

    I'm playing around with the prediction of sporting events, my data looks something like this. A single row for each team and the stats. Team ...

    Started by qwirky64‎, 09-01-2014 03:55 AM
    • Replies: 2
    • Views: 682
    09-02-2014, 01:42 AM Go to last post
  44. Can the PCA scores be used as variables in multiple linear regression

    Hello, I used PCA to reduce the dimensions of a data set of 10 variables into 2 principal components (describing 82% of variance in data set of 10...

    Started by Deccantraps‎, 08-27-2014 06:49 PM
    multiple regression, pca
    • Replies: 6
    • Views: 1,310
    08-31-2014, 04:04 AM Go to last post
  45. Confused: Mixed model, step-wise regression, testing for random effects

    Dear all, I want to perform a MLR (mixed model) on a data set (details below) that has both numeric and categorical explanatory variables. The...

    Started by Deccantraps‎, 08-30-2014 04:53 AM
    mixed model, mlr
    • Replies: 0
    • Views: 688
    08-30-2014, 04:53 AM Go to last post
  46. Regression Using Interaction Terms - PANEL DATA

    Good afternoon, I am working with a panel data with more than 2000 observations and only two years. My topic is on "Full Risk Insurance" in...

    Started by Guy Salgado‎, 08-29-2014 01:02 PM
    index variable, interaction terms, interaction variables, panel fixed effects, regression coefficients
    • Replies: 0
    • Views: 782
    08-29-2014, 01:02 PM Go to last post
  47. Mixed Model Regression in SPSS

    Hello, I have a random group of participants that answered questions on a survey regarding their general opinions on specific health activities....

    Started by nicoled3145‎, 08-28-2014 07:58 AM
    fixed effects regression, mixed models, random effects regression, regression, spss
    • Replies: 0
    • Views: 755
    08-28-2014, 07:58 AM Go to last post
  48. Pasimonious Model for Neural Networks forecasting, I am really confusing.

    Hello People I recently studied Neural Networks forecasting and some interesting question arose while I am reading various articles on the net. ...

    Started by auto9817‎, 08-27-2014 06:56 PM
    • Replies: 0
    • Views: 569
    08-27-2014, 06:56 PM Go to last post
  49. Use of factor analysis + regression

    Independent Variable: I have a survey of 50 states indicating the amount of control the state board of education has in 31 areas answered on a three...

    Started by cynicalflyer‎, 08-19-2014 11:49 AM
    • Replies: 6
    • Views: 1,553
    08-26-2014, 05:15 PM Go to last post
  50. Non-parametric regression

    I am relatively new to this so excuse my ignorance. As best I can tell non-parametric regression has no coefficients (no slopes). It does have...

    Started by noetsi‎, 08-25-2014 03:02 PM
    • Replies: 8
    • Views: 1,124
    08-26-2014, 10:25 AM Go to last post
  51. Linear or non-linear regression model

    Hi, I have 20 independent variables and 1 dependent. I've used the stepwise method to determined what predictors are more significant compared to...

    Started by djordje‎, 08-25-2014 10:58 PM
    important predictors, nonlinear regression, stepwise, type of regression
    • Replies: 1
    • Views: 786
    08-26-2014, 12:31 AM Go to last post
  52. Comparing 2 best fit lines for 2 halves of a data set

    I have a data set with ~200 coordinates plotted on a scatter plot. I can either use the data set as is, or split this plot into two data sets along a...

    Started by player100200‎, 08-25-2014 06:13 PM
    goodness of fit, regression
    • Replies: 0
    • Views: 573
    08-25-2014, 06:13 PM Go to last post
  53. Regression where IV/predictor is a proportion, bounded by 0 and 1

    Hi, I know that if the outcome variable is a proportion, I'd need to run a beta regression, but can anyone advise on running a regression where...

    Started by morning_sun‎, 08-25-2014 07:32 AM
    proportion, regression
    • Replies: 0
    • Views: 655
    08-25-2014, 07:32 AM Go to last post
  54. Statistical Analysis help for thesis - Correlation, Probit, Tobit and Moderation

    Hello Talkstats users! I am writing here cause I need some guidance on my statistical analysis which has turned out far too complex for my...

    Started by Uni_student‎, 08-25-2014 05:42 AM
    correlation, moderation, probit, tobit
    • Replies: 0
    • Views: 702
    08-25-2014, 05:42 AM Go to last post
  55. Which approach to use? Repeated measures with a covariate

    Hi, I hope that someone can give me a pointer please. I am trying to determine which is the most appropriate test to apply to my data. I have...

    Started by morning_sun‎, 08-24-2014 07:44 AM
    ancova, covariate, regression, repeated measures
    • Replies: 0
    • Views: 494
    08-24-2014, 07:44 AM Go to last post
  56. Post Beta NO Intercept purpose

    Hey guys, What would a Beta with NO intercept tell me about a time series model?

    Started by talbobai‎, 08-23-2014 06:19 AM
    beta, beta regression, regresion analysis
    • Replies: 0
    • Views: 694
    08-23-2014, 06:19 AM Go to last post
  57. Adding dummy variables let significance of coefficients disappear

    Hi all I have a regression with two variables x1 and x2, both are significant. When I add a dummy variable D (which is significant), one of the...

    Started by weasel‎, 08-22-2014 04:22 AM
    • Replies: 3
    • Views: 1,119
    08-22-2014, 07:14 AM Go to last post
  58. Strong Predictor

    Hi guys! I have a question... I'm trying to fit 4 predictors to regress on abdominal fat. Multicollinearity was checked for, and all the other...

    Started by gene2420‎, 08-21-2014 02:37 PM
    • Replies: 3
    • Views: 995
    08-22-2014, 02:27 AM Go to last post
  59. Are there model specification tests for Two Stage Least Squares (2SLS)?

    Question. Are there model specification tests for Two Stage Least Squares (2SLS)? I am trying to estimate the parameters (B1, B2, B3) of the...

    Started by Socks‎, 08-21-2014 01:23 AM
    • Replies: 0
    • Views: 694
    08-21-2014, 01:23 AM Go to last post
  60. Question Regression confusion

    I am looking at relationship between GHQ12 and treatment. Just wondering is it suitable to do regression analysis on this? But which would be my...

    Started by nmm‎, 08-20-2014 07:58 AM
    • Replies: 3
    • Views: 1,001
    08-20-2014, 01:52 PM Go to last post

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