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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Statistics Regression Question

    I need help with this question! The graph is in the picture below! A popular, nationwide standardized test taken by high-school juniors and...

    Started by zolton5971‎, Yesterday 09:56 AM
    • Replies: 1
    • Views: 121
    Today, 06:34 PM Go to last post
  2. unit price of total pris?

    Hi, I am a first year economic student and are having some fun with regressions. I am doing a a regression analyse of some example data I have...

    Started by bodesmiller‎, Yesterday 05:05 AM
    • Replies: 0
    • Views: 70
    Yesterday, 05:05 AM Go to last post
  3. Interpreting coefficients from GLM output

    Hi, I'm trying to educate myself further on using GLM and to do so I figured it'd be easiest to conduct a simple experiment where I knew the...

    Started by schwartzaw‎, 03-04-2015 10:23 AM
    • Replies: 7
    • Views: 138
    03-04-2015, 07:59 PM Go to last post
  4. Which multilevel approach is the right one? Help needed choosing a method.

    Hi everyone, I have a data set with a very specific structure and I am looking for a suitable way to analyze it. To be more precise, I am...

    Started by numerator‎, 03-04-2015 06:47 PM
    multilevel model, nested structure
    • Replies: 0
    • Views: 76
    03-04-2015, 06:47 PM Go to last post
  5. Help with interaction terms

    Hi, I have two categorical variables (race and field of study) as a part of my model to predict degree completion. In addition to the original model,...

    Started by commuter1112‎, 03-04-2015 01:08 PM
    • Replies: 1
    • Views: 58
    03-04-2015, 03:58 PM Go to last post
  6. Help with interactions in regression

    Hi I would really appreciate if anyone could please help me with this. I am doing a regression analysis, looking at the effect of 2 drugs (A or B)...

    Started by Bio_Stat‎, 03-03-2015 07:42 PM
    • Replies: 3
    • Views: 92
    03-04-2015, 08:19 AM Go to last post
  7. Interpreting Coefficients in Mediation Analysis with Logged Variables

    Hello out there. I really hope u can help me because i've tried to find a solution to my problem for ages now.. im performing a mediation analysis...

    Started by loop‎, 03-03-2015 05:22 AM
    • Replies: 0
    • Views: 73
    03-03-2015, 05:22 AM Go to last post
  8. transform probit into logit

    Hi everyone, is there a way to transform results obtained from a probit regression into results obtained from a logit regression? I am looking for...

    Started by natoe‎, 03-02-2015 04:06 AM
    • Replies: 1
    • Views: 97
    03-02-2015, 04:21 AM Go to last post
  9. Question About Excluded Variable

    Hi,please help me. I'm working on a thesis to determine the effect of independent variables(four independent variables, denoted by X1,X2,X3 and X4)...

    Started by muridbertanya‎, 03-01-2015 09:26 PM
    • Replies: 0
    • Views: 96
    03-01-2015, 09:26 PM Go to last post
  10. statistical tool/program for obtaining stiffness properties by force-deflection data

    I am performing flexural testing of composite honeycomb sandwich panels as per D7250,desired deliverables(stiffness values G,U and D) are obtained...

    Started by Brook79‎, 03-01-2015 11:42 AM
    • Replies: 0
    • Views: 129
    03-01-2015, 11:42 AM Go to last post
  11. Dependent variable is function of itself

    I have a model: qty=a.price+....(other IVs) Price is calculated as sales_amount/qty. Hence for a customer, if we aggregate data of a certain...

    Started by abhik‎, 02-27-2015 01:17 PM
    • Replies: 2
    • Views: 196
    02-27-2015, 08:55 PM Go to last post
  12. R-Squared Change - Multivariate Multiple Regression

    Hello everyone, I've been asked to conduct a multivariate multiple regression with multiple DVs (3 measures of a dependence construct) predicted...

    Started by trujilloma‎, 02-25-2015 07:34 PM
    multivariate regression, r squared change
    • Replies: 0
    • Views: 115
    02-25-2015, 07:34 PM Go to last post
  13. Non-linearity in OLS-Models, Multinominal Logit-Regression

    Hey there, I have a question connected to the Ols-Model in case of nonlinearity between parameters. What should be done if the assummption of...

    Started by looop‎, 02-15-2015 03:22 PM
    multinomial logit, non-linear, ols regression, regression assumption
    • Replies: 2
    • Views: 172
    02-25-2015, 12:49 PM Go to last post
  14. Hot to analyze data at various levels (company and employee)?

    I have a data set with data at two different levels. I want to analyze the perceptions of employees of a specific management practice. The data...

    Started by DrJames‎, 02-20-2015 06:19 PM
    • Replies: 1
    • Views: 202
    02-25-2015, 12:45 PM Go to last post
  15. Multiple logistic regression - need for interaction checking?

    Hello, and thank you for reading this post. I am a medical doctor with limited statistical knowledge, so bare with me... I am trying to answer...

    Started by jujufish‎, 02-24-2015 09:37 AM
    interactions, multiple regression
    • Replies: 2
    • Views: 92
    02-25-2015, 12:26 PM Go to last post
  16. meta analysis of many regression studies

    Ive searched the forum for answers to this but no joy yet so please help if you can. I have about 30 published studies looking at the dependence...

    Started by andyspeak‎, 02-17-2015 06:17 AM
    • Replies: 12
    • Views: 371
    02-25-2015, 05:31 AM Go to last post
  17. Question Discrepancy between Geogrebra, Excel, Desmos, and TI-83 PLUS...what's the deal?

    As my title implies, there is a discrepancy between Geogebra, Excel, Desmos, and TI-83 Plus. Let me explain myself I have created a fifth and...

    Started by nddn‎, 02-21-2015 03:19 PM
    • Replies: 3
    • Views: 210
    02-21-2015, 08:09 PM Go to last post
  18. Checking homoscedasticity in repeated measures

    Hello, When checking the assumption of constant variance for repeated measures data, am I correct in thinking that the variance of residuals...

    Started by deeuu‎, 02-18-2015 11:36 AM
    homoscedasticity, regression assumption
    • Replies: 0
    • Views: 115
    02-18-2015, 11:36 AM Go to last post
  19. Smile Conditional logistic regression- effect of modifiers

    Hi everybody, I am new here in this forum. I am studying the effect of air pollution (PM) on health outcomes, and the characteristics that might...

    Started by AlinaVo‎, 02-18-2015 03:18 AM
    case control; matched, coefficients, conditional regression
    • Replies: 0
    • Views: 108
    02-18-2015, 03:18 AM Go to last post
  20. Multiple regression where only part of the sample completed the follow up survey

    Hi, For my dissertation I trying to determine whether several emotions predict behavioural intention and behaviour. Participants were asked to...

    Started by Chris12‎, 02-16-2015 03:33 PM
    • Replies: 0
    • Views: 113
    02-16-2015, 03:33 PM Go to last post
  21. Interaction between binary and continuous variable in OLS

    I am trying to examine the association between maternal education and child school test scores using the following equation. TestScore = β0 + β1...

    Started by monzur‎, 02-16-2015 12:02 AM
    interaction effect, ols regression
    • Replies: 3
    • Views: 261
    02-16-2015, 08:09 AM Go to last post
  22. Regression / modelling help

    Hi All, I'm new here so If I've posted this in the wrong place or its not practical then I apologise. I'm new to regression so helpfully Im...

    Started by bobastic‎, 01-14-2015 05:44 PM
    • Replies: 5
    • Views: 402
    02-15-2015, 08:45 PM Go to last post
  23. 2sls regression

    hi, what be the consequenses of using the same explanatory variables in a simultaneous equations system? for example if both the supply and the...

    Started by bodesmiller‎, 02-15-2015 11:51 AM
    • Replies: 0
    • Views: 131
    02-15-2015, 11:51 AM Go to last post
  24. regression analysis reporting: chemist needs help!

    Hello, everyone. We have some regression data we'd like to report, but aren't sure how to best do so. Here's the situation: A lab analyst runs a...

    Started by artie mckim‎, 02-15-2015 10:28 AM
    • Replies: 0
    • Views: 108
    02-15-2015, 10:28 AM Go to last post
  25. how to draw a logistic curve in word, excel etc

    Hello, I am working on a binary logistic regression and would like to insert the logistic sigmoid curve. do you know how to draw such a curve in...

    Started by t.wang21@yahoo.com.au‎, 02-14-2015 08:32 PM
    • Replies: 0
    • Views: 116
    02-14-2015, 08:32 PM Go to last post
  26. Question Weighted Regression

    I have a few questions in regards to setting up and running my weighted regression: Firstly, some background. I am comparing point of subjective...

    Started by JackFarr‎, 02-14-2015 08:28 AM
    pse, regression, sem, weighted
    • Replies: 0
    • Views: 138
    02-14-2015, 08:28 AM Go to last post
  27. B Coefficient

    I'm having some difficulty making sense of a logistic regression. I think I have the interpretation right based on a university tutorial on how to...

    Started by jle‎, 02-12-2015 12:40 AM
    • Replies: 5
    • Views: 257
    02-13-2015, 08:41 AM Go to last post
  28. Design question: proportion explained variance by placebo effect

    Dear all, I have a design question about investigating a placebo effect. Does anyone have a clue how to analyze the proportion explained variance...

    Started by maart91‎, 02-12-2015 07:37 AM
    • Replies: 2
    • Views: 134
    02-13-2015, 04:23 AM Go to last post
  29. Error Propagation in Separate Binomial Logistic Regressions

    On http://en.wikipedia.org/wiki/Multinomial_logistic_regression#Introduction is written, that the estimation errors of separate binomial logit models...

    Started by consuli‎, 02-12-2015 03:08 PM
    • Replies: 0
    • Views: 101
    02-12-2015, 03:08 PM Go to last post
  30. 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: 467
    02-12-2015, 08:47 AM Go to last post
  31. Mixed effects model residual analysis (help!)

    Hello, I have little experience with mixed-effects models and could do with some help when it comes to checking model assumptions. I am using...

    Started by deeuu‎, 02-10-2015 08:40 AM
    • Replies: 1
    • Views: 183
    02-11-2015, 04:34 AM Go to last post
  32. risk of using group level variables to predict individual outcomes in regression

    Hi, GOAL: I have been running a multivariate linear regression to predict student outcomes (grades; at the individual student level) from several...

    Started by Thea‎, 02-10-2015 08:09 PM
    • Replies: 0
    • Views: 142
    02-10-2015, 08:09 PM Go to last post
  33. Linear Regression (Age Interval, 10 years)

    Hi guys, I initially ran a linear regression, however we found that age (by year) generated a negligible B coefficient. In response we...

    Started by jle‎, 02-09-2015 09:29 PM
    • Replies: 5
    • Views: 241
    02-10-2015, 08:54 AM Go to last post
  34. F-Test for SLR & MLR?

    I am trying to finish a homework problem for a grad level stats class and can't seem to find an answer anywhere to this question written in plain...

    Started by statsisnotmyfriend44‎, 02-09-2015 10:10 PM
    f-test, linear regression, mlr, slr
    • Replies: 1
    • Views: 127
    02-10-2015, 02:09 AM Go to last post
  35. Interpretation of linear-log regression model (Neep Help)

    Dear All, I had a problem with my data of growth in percentage regarding negative and positive values due to which I could not transform it into...

    Started by b1lal‎, 02-09-2015 06:57 AM
    interpretation, log-linear, regression analysis
    • Replies: 2
    • Views: 136
    02-09-2015, 01:46 PM Go to last post
  36. Help with PCA-Loading Interpretation

    Hey People Im currently learning to use multivariate analysis in my PhD project, and have an Abstract deadline and a Statistician on holiday so I...

    Started by Taraaa‎, 02-09-2015 08:06 AM
    • Replies: 0
    • Views: 139
    02-09-2015, 08:06 AM Go to last post
  37. Writing R^2 strictly in terms of simple correlations among variables

    Say we have the following regression Y_i=\beta_0+\beta_1X_{1i}+\beta_2X_{2i}+\epsilon_i I want to write the multiple R^2 for this regression...

    Started by Jake‎, 10-17-2014 04:45 PM
    • Replies: 8
    • Views: 665
    02-07-2015, 07:06 PM Go to last post
  38. Transforming skewed data without decreasing kurtosis

    Have a data set with negative kurtosis and skewness values. Have tried numerous transformations but cannot find a solution that generates acceptable...

    Started by DrJames‎, 02-06-2015 03:09 PM
    • Replies: 4
    • Views: 267
    02-07-2015, 12:52 PM Go to last post
  39. Validity of the regression equation.

    Along with this post, I have attached a screenshot of my assignment and I am confused about the validity of regressions equations. I plotted linear...

    Started by Tansai‎, 02-06-2015 12:04 PM
    • Replies: 1
    • Views: 125
    02-06-2015, 01:10 PM Go to last post
  40. Ambulance utilisation: help choosing a method

    Hi, I need some advice in selecting a statistical test please. I am researching ambulance utilisation rates at a population level (defined by a...

    Started by john_martin‎, 02-04-2015 05:16 PM
    • Replies: 8
    • Views: 383
    02-06-2015, 04:57 AM Go to last post
  41. Must categorical variables always be dummy coded in linear regression?

    My question is must we always dummy code categorical variables in linear regression. What if I wanted to understand the overall effect of a...

    Started by dce219‎, 02-05-2015 11:05 PM
    • Replies: 2
    • Views: 170
    02-06-2015, 04:43 AM Go to last post
  42. Regression Model is not full rank

    Hi all, I am trying to detect relationship of crop yield at the end of the growing seasson (1 dependent variable) using amount of precipitation in...

    Started by szm‎, 11-19-2012 12:18 PM
    full rank, multicollinearity, p-value, problem, regression
    • Replies: 3
    • Views: 2,710
    02-06-2015, 03:08 AM Go to last post
  43. Fixed term is (Intercept) --Dredge function

    Hi, i'm currently running a glm model in R and have attempted to use the following code: Model:...

    Started by arl139‎, 02-05-2015 09:52 PM
    dredge, glm, logistic regression
    • Replies: 2
    • Views: 220
    02-05-2015, 11:08 PM Go to last post
  44. Which Blood Pressure Tool better predicts kidney function: help choosing test.

    Hi there, I am trying to see whether there is an advantage of using one blood pressure tool over another at predicting kidney function. Both...

    Started by Robspierre‎, 02-05-2015 06:19 PM
    • Replies: 1
    • Views: 129
    02-05-2015, 10:12 PM Go to last post
  45. Regression Analysis: Heteroskedasticity

    Hello I am a student studying econometrics and at the moment we are studying about heteroskedasticty and autocorrelation. I have been analysing...

    Started by mattonline‎, 02-05-2015 04:14 PM
    • Replies: 0
    • Views: 122
    02-05-2015, 04:14 PM Go to last post
  46. range of possible values for regression coefficients given another one?

    i feel like the answer to my question is a 'no' but i'll ask it anyway just to be absolutely sure. say you have 3 variables X, Y and Z each one...

    Started by spunky‎, 01-28-2015 01:36 PM
    regresion, restriction
    • Replies: 3
    • Views: 269
    02-04-2015, 04:11 PM Go to last post
  47. How to check if vector is close to space spanned by 2 basis vectors (lin. regression)

    Here is the situation: I have measured gene expression data for cells that have been subjected to three different stimuli. This means I have 3 long...

    Started by Rubber‎, 02-04-2015 10:48 AM
    gene expression, linear regression
    • Replies: 0
    • Views: 116
    02-04-2015, 10:48 AM Go to last post
  48. Use of scale () function and conflicting standardized values for fixed effects

    Hi, I'm currently using the scale() function in a glmer model (see below) and I'm having some inconsistencies between my standardized coefficient...

    Started by arl139‎, 02-04-2015 08:12 AM
    • Replies: 0
    • Views: 116
    02-04-2015, 08:12 AM Go to last post
  49. Addressing Heteroskedasticity: OLS (robust), OLS [aweight], VWLS (w/omega)

    Hello dear forum member, Your recent help with my model specification has been invaluable. I also followed your advise on reading the book by...

    Started by kiton‎, 01-31-2015 04:04 PM
    • Replies: 8
    • Views: 287
    02-03-2015, 01:16 PM Go to last post
  50. Interpreting the coefficients of my regression model

    Hi all, I am a student at Bournemouth University currently undertaking a research project into the pay-performance sensitivity in AIM companies. I...

    Started by george1660‎, 02-01-2015 05:05 AM
    • Replies: 6
    • Views: 322
    02-02-2015, 11:08 AM Go to last post
  51. Logit regression interaction/moderation: what to do about it?

    Hi all! I have a multivariable logit regression model that has two terms showing two-way interaction (the interaction also makes biological...

    Started by Johann Kotze‎, 01-31-2015 05:10 AM
    interaction variables, logistic regression, moderation
    • Replies: 3
    • Views: 269
    01-31-2015, 11:24 PM Go to last post
  52. Linear and Non-Linear three parameter Regression Analysis questions.

    Hello All A short warning for a very long post! Im currently working on my master thesis in mechanical engineering. I need to do, for me, an...

    Started by kbach‎, 01-31-2015 09:19 AM
    • Replies: 0
    • Views: 169
    01-31-2015, 09:19 AM Go to last post
  53. Meta Analysis with Several Regression Studies

    Hi folks, this is my first post. I'm encountering a class of problems that I do not know how to solve. If anyone out there can give me any book...

    Started by Tom Mattson‎, 01-28-2015 04:20 PM
    • Replies: 0
    • Views: 166
    01-28-2015, 04:20 PM Go to last post
  54. Regression help needed

    Hi members, Is there anyone who would be willing to give me 5 hours during the day sometime of some regression / modelling help. Im happy to pay...

    Started by bobastic‎, 01-28-2015 07:03 AM
    • Replies: 0
    • Views: 176
    01-28-2015, 07:03 AM Go to last post
  55. re: basic question on why my predictor is not significant?

    I am puzzle by why my predictor was not significant so I would like to seek your expertise. My regression model does not provide significant on the...

    Started by minhdung‎, 01-27-2015 03:43 PM
    regression
    • Replies: 3
    • Views: 250
    01-28-2015, 12:04 AM Go to last post
  56. Unobserved heterogenity

    This is a signficant problem potentially for Cox and logistic regression. I have never found a test for whether it exists. I doubt there is one, but...

    Started by noetsi‎, 01-26-2015 02:28 PM
    2 Pages
    1 2
    • Replies: 16
    • Views: 413
    01-27-2015, 02:01 PM Go to last post
  57. How do you find the average correlation of a variable that changes over time?

    I'm looking at a data set of movies with the number of mentions on Twitter over time and trying to find if there's a linear correlation with box...

    Started by sosaysi‎, 01-26-2015 05:50 PM
    • Replies: 2
    • Views: 209
    01-27-2015, 11:13 AM Go to last post
  58. Doing correct backwards elimination with interaction terms?

    I'm wondering about this, and I can't find an answer anywhere. My textbook (Agresti and Finlay 2009) clearly says how to do backwards elimination on...

    Started by Lukan27‎, 01-26-2015 12:49 PM
    2 Pages
    1 2
    backwards, correct, elimination, interaction, term
    • Replies: 15
    • Views: 384
    01-27-2015, 10:27 AM Go to last post
  59. DV is a RANK with highest 1 and lowest 899 - what is the proper estimation method?

    Hello dear forum members! I want to do a robustness check of the estimates that I have obtained previously using OLS estimation. In that case the...

    Started by kiton‎, 01-25-2015 07:23 PM
    • Replies: 11
    • Views: 287
    01-26-2015, 04:19 PM Go to last post
  60. 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: 196
    01-25-2015, 03:01 PM Go to last post

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