1. 10-14-2010
    Views:
    37,948
+ Post New Thread
Page 12 of 71 FirstFirst 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 62 ... LastLast
Threads 661 to 720 of 4235

Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Help with Hat Matrix

    considering the model Yi=β0+β1Xi+ϵi, i=1,2,3,Ö,n how can i calculate the hat matrix and what would element hij be ? thanks

    Started by jerry212‎, 10-28-2015 07:39 PM
    hat matrix, regression
    • Replies: 0
    • Views: 615
    10-28-2015, 07:39 PM Go to last post
  2. Question Partial Correlation question help

    Hi, I was wondering if you could help me. I've been set the problem below. I know how to work out the Partial Correlation and I could do it for A1 or...

    Started by jamesyp21‎, 10-28-2015 03:45 PM
    • Replies: 0
    • Views: 512
    10-28-2015, 03:45 PM Go to last post
  3. Interpreting a IV variable whose values have been changed

    Hello all, I'd just like to get advice on the following: I've got a few independent variables which had values ranging from -2.5 to 2.5. I...

    Started by ChrisUCT‎, 10-27-2015 12:08 PM
    • Replies: 1
    • Views: 533
    10-27-2015, 01:32 PM Go to last post
  4. Interaction/moderation in probit/logit

    Dear all, in my studies some (maybe trivial...?) questions on interaction/moderation in probit/logit regression came up. Imagine the following...

    Started by Ute‎, 10-17-2015 02:33 AM
    • Replies: 2
    • Views: 865
    10-26-2015, 12:49 PM Go to last post
  5. 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: 612
    10-23-2015, 01:40 PM Go to last post
  6. OR improving inmultyvariate logistic regression

    Hi! Does it make sense that odds ratio are getting better (higher) and more significant when moving from a univriate to a multivariate regression...

    Started by Doobdoob‎, 10-19-2015 01:43 PM
    • Replies: 10
    • Views: 912
    10-22-2015, 04:03 PM Go to last post
  7. Testing the equality of the Residual Sum of Squares of two linear models

    I have two models of a dependent variable: Y = a1 + b1X1 and Y = a2 + b2X2 The variances around the lines of least error are important...

    Started by BigBugBuzz‎, 10-22-2015 08:12 AM
    • Replies: 2
    • Views: 509
    10-22-2015, 09:19 AM Go to last post
  8. Question Need help with parallel mediated quadratic regression

    Dear friends, currently I am stuck with a problem I can't solve on my own - I hope some of you might have a bright idea :) I am looking for...

    Started by robeh‎, 10-19-2015 07:29 AM
    • Replies: 1
    • Views: 534
    10-22-2015, 06:18 AM Go to last post
  9. Help setting up a dataset for multi-level modeling

    Hi everyone, I'm new to multi-level modeling (MLM) and have a question about how to set up my data. My study design involved two between...

    Started by kelly.s‎, 10-20-2015 02:22 PM
    • Replies: 0
    • Views: 497
    10-20-2015, 02:22 PM Go to last post
  10. Redesigning a questionnaire (a bit long...)

    A quick background: I am trying to evaluate a questionnaire used to asses patients. It is used around the world to establish whether a patients...

    Started by j_cocker‎, 10-19-2015 04:59 AM
    • Replies: 0
    • Views: 411
    10-19-2015, 04:59 AM Go to last post
  11. Durbin-Watson bound dU>2.0

    Hello. I was wondering, how to interpret bounds of Durbin-Watson test (dU, dL) if dU is greater than 2.0. I know that it is an extreme case, but just...

    Started by harel‎, 10-17-2015 09:40 AM
    durbin-watson, ols regression
    • Replies: 0
    • Views: 703
    10-17-2015, 09:40 AM Go to last post
  12. regression for ordinal data?

    Hi All, I am looking at data showing injury to intervertebral discs. Injuries are graded on a 4 point scale with 0 being no damage and 3 being...

    Started by mac101‎, 09-27-2015 02:59 PM
    ordinal regression, regression analysis
    • Replies: 3
    • Views: 1,078
    10-17-2015, 06:19 AM Go to last post
  13. Does the intercept p value matter?

    Hi everyone, I work on a model with logistic regression as a result I have intercept value = 0.06 , with a p-value = 0.86. Does this model...

    Started by valko‎, 10-16-2015 06:56 AM
    • Replies: 5
    • Views: 863
    10-17-2015, 04:20 AM Go to last post
  14. Multilevel model with crossed random effects - does this model make sense?

    I have a complex design and haven't found similar examples online. I'd really appreciate any views on the way I modelled it. At a first stage, 19...

    Started by lucnv‎, 10-16-2015 05:44 PM
    crossed, mixed effects model, multi-level data, nested
    • Replies: 0
    • Views: 474
    10-16-2015, 05:44 PM Go to last post
  15. Durbin-Watson

    Hi, Do I need to run a Durbin-Watson test if I am finding regressions for the number of second-language words learnt in a week based on age in...

    Started by becread95‎, 04-29-2015 09:12 AM
    • Replies: 2
    • Views: 775
    10-16-2015, 04:18 PM Go to last post
  16. SE of Reference category in Multinomial Logit Model

    I used R to fit a Multinomial Logit model to my data. The data includes some categorical variables as effect coded variables. For example, one...

    Started by Hendrik6‎, 10-14-2015 12:29 PM
    effect coding, multinomial logit, reference category, standard error
    • Replies: 7
    • Views: 894
    10-15-2015, 09:55 AM Go to last post
  17. Comparing two factors in five areas

    I recently compared two factors in five different areas testing diversity of one factor against another. (Diversity was made quantitative for...

    Started by Patatas345‎, 10-14-2015 04:01 PM
    ancova, anova ecology biology, combining items, regression help, testing
    • Replies: 0
    • Views: 516
    10-14-2015, 04:01 PM Go to last post
  18. GLM multivariate analysis with proportion & continuous data

    Hi there, I am looking to perform some multivariate analysis on my data (such as canonical correlation analysis or multivariate multiple...

    Started by cmg212‎, 07-27-2014 12:06 PM
    • Replies: 1
    • Views: 1,656
    10-11-2015, 04:11 PM Go to last post
  19. Physics Teacher with a question of appropriate use of regression equaitons

    Is it ever acceptable to replace discrete measured values with a continuous function if you are certain you have the right model? For the last...

    Started by Mr. O‎, 10-10-2015 07:39 PM
    calculus, lab data, physics, regression analysis
    • Replies: 4
    • Views: 920
    10-11-2015, 01:56 PM Go to last post
  20. Testing a log transformed reg model with the non-log transformed

    Hello, I was wondering how one test two regression models against each other. One being the log transformed of the other like this: y = var1 +...

    Started by nanana‎, 10-08-2015 08:30 AM
    • Replies: 6
    • Views: 932
    10-10-2015, 02:40 PM Go to last post
  21. lagged variables in a model

    Hi, i am reading an academic article and i am not sure i understood the model correctly. 1. It is written that the dependent variable is...

    Started by ophiroz‎, 09-15-2015 01:04 PM
    • Replies: 4
    • Views: 949
    10-10-2015, 09:41 AM Go to last post
  22. Time Series Analysis with Triple exponential smoothing

    What would be the best formula to forecast a weeks worth of daily data?

    Started by mdo8105‎, 10-07-2015 03:16 PM
    • Replies: 3
    • Views: 681
    10-07-2015, 04:05 PM Go to last post
  23. AIC backward selection - control variables

    Hej! I have a question concerning AIC backwards selection. I am doing a Linear Mixed effect model where I have one main predictor and several...

    Started by puenktchen‎, 10-06-2015 09:37 AM
    • Replies: 2
    • Views: 694
    10-06-2015, 12:26 PM Go to last post
  24. scatter plot for partial regression (in spss)

    Hi all I have an SPSS regression model in which I have a dependent variable, an independent variable and 4 covariates. I want to create a...

    Started by Lee R.‎, 10-06-2015 10:46 AM
    partial regression, partial regression plot, regression, scatter plot, scatterplot
    • Replies: 0
    • Views: 560
    10-06-2015, 10:46 AM Go to last post
  25. Leave one out cross validation

    Hi everybody, I've done a linear regression analysis with forward selection method. my number of observations are 32 and the final model selected 2...

    Started by Bahareh‎, 09-27-2015 07:56 AM
    loocv, regression
    • Replies: 3
    • Views: 1,265
    10-06-2015, 01:09 AM Go to last post
  26. Problem with Greene Econometric Analysis 7th Edition demand example page 110

    Strange question, I know, but I am unable to reproduce the results shown when he adds a lagged dependent variable to his gasoline demand function....

    Started by Rod‎, 10-04-2015 09:53 PM
    • Replies: 0
    • Views: 614
    10-04-2015, 09:53 PM Go to last post
  27. Automatically finding relationships between 3 or more variables

    Hello, Total newbie here - but I'm hoping someone can help me out. I have finished running a multiple regression analysis and have my results....

    Started by Tzo‎, 10-02-2015 07:37 PM
    • Replies: 0
    • Views: 510
    10-02-2015, 07:37 PM Go to last post
  28. Ordinal regression shows negative effect when spearman correlation shows positive

    I running a regression model where a variable is indicated to have a negative impact on the predicted variable: Estimate Std....

    Started by micdhack‎, 09-30-2015 12:26 PM
    • Replies: 8
    • Views: 1,163
    10-01-2015, 02:35 PM Go to last post
  29. The best formula to use in excel to forecast daily call volume?

    I have used single and double exponential smoothing, but did not know if there is a more accurate approach to predict how many calls that can be...

    Started by mdo8105‎, 09-24-2015 03:16 PM
    holt winters, regression analysis, time series forecast
    • Replies: 4
    • Views: 2,539
    10-01-2015, 01:46 PM Go to last post
  30. Cross validation

    Hello, I have a basic question about cross validation and regression model. what is the final regression model made from? I mean the final model...

    Started by Bahareh‎, 10-01-2015 03:53 AM
    • Replies: 5
    • Views: 926
    10-01-2015, 12:07 PM Go to last post
  31. how to calculate co-efficients

    Hi all, This is my first post on this forum. Lets say I have, x vectors (-0.0028, 5.0028, 10.0085, 15.0085, 20.0028) y vectors (0, 5, 10, 15,...

    Started by hemnath‎, 09-25-2015 05:48 AM
    • Replies: 7
    • Views: 1,142
    09-30-2015, 10:10 PM Go to last post
  32. How to treat missing IV cases in logistic regression?

    Hey folks, quick question: I am analyzing consumers advertising click behavior (click/no-click =DV) and two IVs in this model are the location of...

    Started by oniontoast‎, 09-30-2015 10:52 AM
    • Replies: 4
    • Views: 777
    09-30-2015, 01:38 PM Go to last post
  33. Estimate or Contrast Statement in ANOVA

    Hey, I was asked to review a student's paper. In it they have 2 exposures groups and multiple continuous outcomes they are examining. They...

    Started by hlsmith‎, 09-30-2015 09:39 AM
    • Replies: 1
    • Views: 601
    09-30-2015, 11:00 AM Go to last post
  34. Confused about how to proceed

    Hi all, I have Y vectors = (0, 5, 10, 15, 20) At Condition1, x Vectors = (-0.0056, 5.0000, 10.0057, 15.0057, 20.0000) At Condition2, x vectors =...

    Started by hemnath‎, 09-26-2015 12:32 AM
    • Replies: 1
    • Views: 525
    09-30-2015, 02:51 AM Go to last post
  35. Normal logistic regression vs a mixed model; which to use? benefits gained?

    I have some evidence to suggest that one vaccine was far superior over another and resulted in the local elimination of a disease. Because it affects...

    Started by Johann Kotze‎, 09-18-2015 09:48 AM
    health research, logistic regression, mixed model
    • Replies: 6
    • Views: 991
    09-29-2015, 11:23 AM Go to last post
  36. Linear, step wise regression vs binary logistic regression - which method to choose

    Dear friends I have a dilemma about choosing a right logistical method. i want to find predictor factors of life satisfaction and have 5...

    Started by badibad‎, 09-28-2015 05:33 PM
    • Replies: 7
    • Views: 947
    09-29-2015, 07:46 AM Go to last post
  37. Use predicted values or residuals in the second stage?

    Hello all: I have a panel dataset (firms) in which some variables are "choice" variables (that is, they reflect executives' free choices as well...

    Started by jayhawk‎, 09-28-2015 06:29 PM
    endogeneity, panel data, predicted values, residuals, two stage model
    • Replies: 0
    • Views: 336
    09-28-2015, 06:29 PM Go to last post
  38. Strange results in univariable linear regression when groups are stratified

    Dear Forum users, I am stuck with some unusual results and would appreciate some ideas as to why/how this happened. Iím testing the relationship...

    Started by MHS‎, 09-27-2015 06:15 AM
    simpson's paradox
    • Replies: 1
    • Views: 759
    09-27-2015, 07:18 AM Go to last post
  39. Poisson model on moving averages: non-discrete

    I have a model that is based on counts of cases. It follows a poisson distribution quite well but we are unhappy about the results of the model. In...

    Started by Johann Kotze‎, 09-26-2015 04:21 AM
    continuous variable, poisson
    • Replies: 1
    • Views: 760
    09-26-2015, 05:45 AM Go to last post
  40. Regression and imputing zeros

    Hi all! I have what is likely a simple regression problem. I am imputing Variable X from survey Y to survey Z. I am using a simple linear...

    Started by domwebber‎, 08-28-2015 03:55 AM
    hotdeck, imputation, linear regression, stata 12
    • Replies: 2
    • Views: 837
    09-24-2015, 02:16 PM Go to last post
  41. Question If B predicts A, can A also predicts B?

    Hi everyone, I'm new to multiple regression analysis. I have a question and I hope someone can help answer it. Thank you. In a multiple regression...

    Started by statsnewbie28‎, 09-23-2015 11:04 AM
    dependent variable, multiple regression, predictors
    • Replies: 9
    • Views: 1,285
    09-24-2015, 12:55 PM Go to last post
  42. How to deal with repeated measures data in multiple linear regression?

    Hello, I am a novice in the area of regression analyses, and was hoping someone could shed some light on my situation. I will be conducting a...

    Started by tylerbweaver‎, 09-22-2015 09:56 AM
    • Replies: 8
    • Views: 962
    09-22-2015, 03:51 PM Go to last post
  43. Is it linear regression ?

    Hello , according to https://en.wikipedia.org/wiki/Polynomial_regression#Definition_and_example the equation is linear regression . I...

    Started by civilized‎, 09-22-2015 04:07 AM
    • Replies: 2
    • Views: 700
    09-22-2015, 10:54 AM Go to last post
  44. Help with First Differencing in STATA

    Hello I am a student working with STATA for the first time. I am using panel data for the English Premier League football from 2010 to 2015 and am...

    Started by Ekhanolkar18‎, 09-21-2015 05:45 PM
    first difference, panel data
    • Replies: 1
    • Views: 845
    09-22-2015, 02:43 AM Go to last post
  45. 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: 559
    09-21-2015, 02:35 PM Go to last post
  46. Time Series Regression Approach

    My goal is to predict monthly S&P 500 values using a single indicator data set (For example, Unemployment Rates ) My approach has been to extract...

    Started by kimberly_h_1986‎, 09-20-2015 01:41 PM
    speculative markets
    • Replies: 1
    • Views: 567
    09-20-2015, 04:52 PM Go to last post
  47. Linear mixed models? MANOVA? I'm confused...

    Iím a newbie in statistics and R, so I hope that my question isnít too banal for you. Iím going to carry out an experiment in order to verify...

    Started by piravi1980‎, 09-20-2015 01:44 PM
    • Replies: 0
    • Views: 495
    09-20-2015, 01:44 PM Go to last post
  48. Reporting the formula for a mixed model in a paper

    I want to report the basic formula of my mixed model. Everywhere I look for a template the equations seem way too complicated for a journal whose...

    Started by Johann Kotze‎, 09-20-2015 03:41 AM
    mixed model
    • Replies: 1
    • Views: 532
    09-20-2015, 07:08 AM Go to last post
  49. Unhappy Please help me run my data by probit regression

    I have a data for my lesson, but i can not run it in probit. I can not understand the total observed in probit what it is. Or help my run by probit...

    Started by ongquangthai‎, 09-17-2015 09:22 PM
    • Replies: 2
    • Views: 931
    09-18-2015, 07:35 AM Go to last post
  50. Question Spatial econometrics:heteroskedasticity and autocorrelation consistent(HAC) estimator

    Good afternoon, I have quite basic question however I would like to be sure in this. If I use a HAC estimator of the variance-covariance (VC)...

    Started by Melisandre‎, 09-18-2015 07:13 AM
    • Replies: 0
    • Views: 617
    09-18-2015, 07:13 AM Go to last post
  51. reading excel file /text file in R

    I am naive programmer..i am working on regression analysis. when i say read.table("filename.txt",header=FALSE)..where does R searches for the file?...

    Started by scuby‎, 09-17-2015 02:00 PM
    • Replies: 6
    • Views: 763
    09-17-2015, 10:25 PM Go to last post
  52. Stepwise Logit Regression - Drop of variables

    Dear All, I have a small question I hope you could help me with. I am trying to find a predictive model for a dataset doing a stepwise logit...

    Started by Speku‎, 09-13-2015 09:57 PM
    drop variables, stata, stepwise regression
    • Replies: 0
    • Views: 672
    09-13-2015, 09:57 PM Go to last post
  53. Lightbulb Binary predictor in regression analysis?

    I have just had a lecture with a lecturer summarizing regression analysis, and showed us some examples. One of those examples included a regression...

    Started by Lukan27‎, 09-11-2015 11:38 AM
    • Replies: 4
    • Views: 914
    09-12-2015, 11:23 AM Go to last post
  54. Is R2 of multiple linear regression with 1 sign. predictor = R2 of simple lin. regr?

    Hi everyone I always thaught that the resulting R^2 of a multiple linear regression with only 1 significant predictor would be equal to the...

    Started by wep‎, 09-10-2015 05:21 AM
    • Replies: 11
    • Views: 1,285
    09-10-2015, 10:52 AM Go to last post
  55. how to prove COV(y bar, estimated beta1) in linear regression equals 0

    Yi=Xi*beta1 + beta0 + error Prove: COV(average of Yi, estimated beta1) = 0 Thanks!

    Started by hehe1223‎, 06-27-2010 07:30 PM
    2 Pages
    1 2
    • Replies: 24
    • Views: 30,925
    09-10-2015, 12:27 AM Go to last post
  56. Least Squares

    Delete. Unhelpful responses.

    Started by Dave Brunner‎, 09-08-2015 08:20 PM
    • Replies: 8
    • Views: 1,534
    09-09-2015, 06:21 PM Go to last post
  57. control for confounding variables using logistic regression

    Hello... I'm in a project to investigate the prevalence of intrusive thoughts in patients diagnosed with major depressive disorder and non-clinical...

    Started by vahid1990‎, 09-06-2015 08:34 AM
    • Replies: 6
    • Views: 935
    09-08-2015, 03:39 PM Go to last post
  58. Help with multiple dummy variable regression.

    I am attempting to forecast claim denials, whether it will ultimately be adjusted off or not. I am running all the data through excel. The...

    Started by mdo8105‎, 09-08-2015 12:51 PM
    dummy variable, forecast, multiple regression
    • Replies: 0
    • Views: 449
    09-08-2015, 12:51 PM Go to last post
  59. Unhappy Is this a case for Mixed Model Anova?

    HI, My study has 2 IV's each with two levels (2 hull designs and 2 techniques) = 4 conditions, and has 3 subjects. Max acceleration data was...

    Started by Wetninja‎, 09-06-2015 12:12 PM
    mixed anova, multiple datasets
    • Replies: 0
    • Views: 580
    09-06-2015, 12:12 PM Go to last post
  60. Logistic regression- choosing sample

    Hi, I am writing my dissertation and will use a binary outcome variable (decision of a country to sanction other states or not). I was planning to...

    Started by laurafv‎, 09-06-2015 10:41 AM
    • Replies: 0
    • Views: 507
    09-06-2015, 10:41 AM Go to last post

+ Post New Thread
Page 12 of 71 FirstFirst 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 62 ... LastLast

Thread Display Options

Use this control to limit the display of threads to those newer than the specified time frame.

Allows you to choose the data by which the thread list will be sorted.

Order threads in...

Note: when sorting by date, 'descending order' will show the newest results first.

Icon Legend

Contains unread posts
Contains unread posts
Contains no unread posts
Contains no unread posts
More than 15 replies or 300 views
Hot thread with unread posts
More than 15 replies or 300 views
Hot thread with no unread posts
Closed Thread
Thread is closed
Thread Contains a Message Written By You
You have posted in this thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts






Advertise on Talk Stats