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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Large logit coefficient - what it means

    I am constructing a logit model with 6 explanators, trying to predict outcomes of hockey matches using odds (the variable I am referring to below)...

    Started by neil1690‎, 03-11-2013 10:41 AM
    logit model
    • Replies: 12
    • Views: 8,128
    03-12-2013, 06:06 PM Go to last post
  2. Interaction effect significant but main effects not

    Hi all, I was wondering if anyone could give me a help with my logit. I have a DV of disease vs. non-disease and 3 IV: dummy-year (year 1 vs year...

    Started by PedroR‎, 04-27-2013 10:11 AM
    • Replies: 12
    • Views: 20,678
    05-06-2013, 01:46 PM Go to last post
  3. Control Vairiables in Multiple regression

    Hi, I hope someone can help me. I need to run multiple regression with 2 IVs and 1 DV and include a control variables. The control variable is...

    Started by milehigh899‎, 06-06-2013 07:24 AM
    contol variables, regression
    • Replies: 12
    • Views: 2,467
    06-10-2013, 08:34 AM Go to last post
  4. Which kind of Regression should i use for this case?

    Hello everyone, I'm new here and i have just begann with statistical research. I'd be very thankful if anyone could help me with my situation. I...

    Started by chimcanhcut‎, 06-26-2013 08:43 AM
    • Replies: 12
    • Views: 2,224
    07-07-2013, 04:35 PM Go to last post
  5. Statistical set data from 12 years

    Hi, i'm doing a quantitative analysis for my thesis. I've worked with spss to analyse surveys i conducted myself. But now i've got my data from...

    Started by hatsjie‎, 07-18-2013 02:27 AM
    • Replies: 12
    • Views: 1,964
    07-21-2013, 09:30 AM Go to last post
  6. Regression with multiple type of independent and likert scale

    Hi guys, I just discovered this forum and would appreciate any help because I have little background in stats! My research is about interruption...

    Started by tstemdju‎, 08-21-2013 09:13 AM
    • Replies: 12
    • Views: 2,171
    08-26-2013, 10:06 PM Go to last post
  7. Is it ok to have coefficients in exponents?

    Hi all, Pardon me for being so naive, but is it ok to have coefficient in exponents figure. actually I ran a regression model in stata by xtreg...

    Started by asadmushtaq‎, 08-28-2013 11:54 AM
    • Replies: 12
    • Views: 2,202
    08-28-2013, 03:54 PM Go to last post
  8. Determine how much data is required by determining when graph levels out

    I have a bunch of graphs for data that I have collected in my last experiment. The graphs are usually shaped similar to either exponential curves or...

    Started by Phdstudentz‎, 07-11-2014 05:13 PM
    levels out, minimum data, steady state
    • Replies: 12
    • Views: 2,004
    07-15-2014, 06:52 AM Go to last post
  9. Importance of bias in estimators

    I always thought that bias was the central issue in an estimator. The one thing you had to avoid above all else and the gold standard to evaluate the...

    Started by noetsi‎, 12-30-2014 01:32 PM
    • Replies: 12
    • Views: 3,177
    12-30-2014, 02:46 PM Go to last post
  10. Dummy variables with categorical data with multiple levels.

    This always seemed easy to me, largely because I always had an obvious reference group before or I was dealing with variables that had only 2 levels....

    Started by noetsi‎, 02-28-2016 07:44 PM
    • Replies: 12
    • Views: 2,773
    03-21-2016, 08:13 AM Go to last post
  11. Stepwise Regression Limitations Explanation

    I've recently been working on building a model and have come across a number of different approaches. I'm particularly interested in the limitations...

    Started by Phishypenguin‎, 05-03-2016 04:34 AM
    pvalues, regression, stepwise
    • Replies: 12
    • Views: 1,492
    05-04-2016, 06:39 PM Go to last post
  12. Multiple regression analysis: multicollinearity problem

    Dear For my research I'm using interactions in a multiple regression analysis to test the influence of the IV on the DV with moderators. My...

    Started by Hypnoz‎, 03-12-2017 07:44 AM
    • Replies: 12
    • Views: 1,386
    03-19-2017, 02:14 PM Go to last post
  13. Relative impact of regressors on Y.

    A question I get asked a lot is, if we have these three predictors of Y, which of the 3 has the most, next most and least impact. I have tried...

    Started by noetsi‎, 01-29-2017 05:42 PM
    • Replies: 12
    • Views: 3,319
    08-07-2017, 07:31 PM Go to last post
  14. I think this is a simple question but I can't seem to find it in my stats book

    I have a linear regression equation (y=6.0707x-1200.2) that was used to develop 50 point estimates. The sum of these estimates is the point estimate...

    Started by bugle4one‎, 01-19-2017 11:27 AM
    • Replies: 12
    • Views: 3,187
    01-20-2017, 02:29 PM Go to last post
  15. Master thesis, statistics check!

    About me: Medical student with minimal statistical knowledge or research experience Question related to: statistical regression/correlation...

    Started by DutchMedicalStudent‎, 05-22-2017 09:30 AM
    blinded data, correlation, master thesis, spearman correlation
    • Replies: 12
    • Views: 2,762
    06-02-2017, 03:24 AM Go to last post
  16. Independent variables correlate to each other: violation of regression assumoptions?

    Ok, so bear with me - total statistical idiot here, in way over his head. I'm running multiple regressions of plant cover against precipitation,...

    Started by Charlie‎, 11-13-2008 03:37 PM
    • Replies: 11
    • Views: 13,579
    11-19-2008, 10:17 AM Go to last post
  17. Wink Regression/Time Series

    Hello All:wave: I am looking for research help:yup: There is a data set and the goal is to build a model. There are events that happen....

    Started by iknowu99‎, 03-18-2009 03:55 PM
    • Replies: 11
    • Views: 5,277
    07-30-2009, 03:28 PM Go to last post
  18. Linear Regression: Mean square error (MSE) ?

    Simple linear regression model: Y_i = β0 + β1*X_i + ε_i , i=1,...,n where n is the number of data points, ε_i is random error Let σ^2 = V(ε_i)...

    Started by kingwinner‎, 05-21-2009 07:46 PM
    • Replies: 11
    • Views: 55,453
    12-11-2011, 12:32 PM Go to last post
  19. Exclamation Regression and Likert scale variable..HELP!

    Hi everybody, I'm wondering if it is possible to run a multiple regression with a dependent variable measured on a 5-point Likert scale (where 1...

    Started by Latika‎, 10-29-2010 12:14 PM
    • Replies: 11
    • Views: 9,361
    11-01-2010, 04:45 AM Go to last post
  20. Logistic Regression with too many IV

    Hi Guys, What would you do, if you had to build a logistic regression model, where you have 500 (!!) independent variables... ? Any manual best...

    Started by WeeG‎, 03-27-2011 02:15 PM
    • Replies: 11
    • Views: 6,822
    04-01-2011, 12:45 PM Go to last post
  21. Which regression to choose ?

    Hello, I need some help fitting a linear regression model. I have one dependent variable, and 2 IV's. I need to find the best model, which is, a...

    Started by Yankel‎, 06-04-2011 01:55 AM
    • Replies: 11
    • Views: 4,855
    06-05-2011, 01:24 PM Go to last post
  22. Use of Intercept Term in OLS Regression

    When is it appropriate to exclude the intercept term from a standard OLS regression? The dependent variable is Sales (of a particular product) and...

    Started by GLHartland‎, 06-07-2011 11:05 PM
    • Replies: 11
    • Views: 17,909
    03-10-2014, 03:19 PM Go to last post
  23. Please help - all pi values are high!

    Hi there, I was about to prove my argument how different variables affect water availibility in different countries. Unfortunately, I ran the...

    Started by Sylviastat‎, 07-16-2011 06:34 AM
    • Replies: 11
    • Views: 2,962
    07-17-2011, 07:17 PM Go to last post
  24. (easy) Maximum Likelihood Regression question...

    hello everyone. i am trying to get my head around a very easy example that i read somewhere explaining maximum likelihood estimation on the OLS...

    Started by will22‎, 08-27-2011 11:40 AM
    • Replies: 11
    • Views: 4,795
    08-27-2011, 02:33 PM Go to last post
  25. why is the covariance of my residuals not 0?

    hello there. i am trying to wrap my head around the assumption that, in regular OLS regression, the covariance of the residuals is 0. i worked out a...

    Started by will22‎, 09-29-2011 09:45 PM
    • Replies: 11
    • Views: 8,651
    09-30-2011, 12:41 PM Go to last post
  26. Seasonality and dummy variables

    Hey, I've got this econometric problem I could use some help with. I'm looking for day of the week effects in a certain index. I'm using a regression...

    Started by Sands‎, 11-22-2011 03:35 AM
    • Replies: 11
    • Views: 8,493
    11-23-2011, 05:30 AM Go to last post
  27. Multiple regression problem S Shape Residuals

    Hello: I have posted this question before but wanted to give a more thorough explanation of my problem so as to hopefully garner some assistance. I...

    Started by need‎, 01-26-2012 09:37 AM
    • Replies: 11
    • Views: 4,587
    01-26-2012, 10:16 PM Go to last post
  28. Question calculating sample size needed by future studies having got my Logistic Regression

    Help anyone? I have downloaded Gpower 3, and seemingly found the option: under test family: z tests statistical test: logistic regression ...

    Started by Freya_77‎, 07-18-2012 01:13 PM
    logistic regression, sample size
    • Replies: 11
    • Views: 6,138
    07-23-2012, 08:59 AM Go to last post
  29. Warning on Regression

    Hi, I'm trying to run logistic regression analysis but on the output it showed warning: "There is not enough memory for this run. Memory is used...

    Started by mscstats‎, 09-06-2012 02:52 PM
    • Replies: 11
    • Views: 2,357
    09-06-2012, 04:06 PM Go to last post
  30. Linear model + covariate issue

    Hi! I'm hoping to run a logistic regression model and I've run up against a problem I'm not sure how to approach. We have some binary outcome...

    Started by jamesmartinn‎, 01-17-2013 10:30 AM
    • Replies: 11
    • Views: 2,449
    01-17-2013, 05:18 PM Go to last post
  31. regression, interactions and centering how does it work?

    Hello everyone! So yesterday our prof explained to us that one of the reasons of why you "center" (meaning you substract the mean) from your...

    Started by will22‎, 04-16-2013 02:25 PM
    • Replies: 11
    • Views: 3,345
    04-19-2013, 07:46 PM Go to last post
  32. Should I include this variable or not?

    Hello, My dependent binary variable is Turnout in 2010 elections (yes/no) and I'm performing logit analysis using a cross-sectional dataset. ...

    Started by Athinagoras‎, 04-22-2013 04:39 PM
    logisitic regression, logit
    • Replies: 11
    • Views: 2,003
    04-23-2013, 02:01 PM Go to last post
  33. normality assumption in regression: THE FINAL ANSWER!!!

    ok, maybe it's not *the* final answer, but here's a theory of where this may be coming from. ever since noetsi started asking this question about...

    Started by spunky‎, 06-27-2013 04:31 AM
    • Replies: 11
    • Views: 3,285
    07-02-2013, 09:48 AM Go to last post
  34. How to find beta in a regression model?

    Dear all, This might be a silly question, however I am a newbie when it comes to Stats. Im currently writing my thesis and for this I am analysing...

    Started by crazyaboutstats‎, 01-26-2014 05:03 PM
    • Replies: 11
    • Views: 3,544
    01-28-2014, 01:07 PM Go to last post
  35. Time Series Regression

    Hi Guys I am doing time series regression Had tried to find the order of correlation but the ACF function is a cyclical one (line a sine curve)...

    Started by Sizor Mohanty‎, 11-11-2013 10:19 AM
    • Replies: 11
    • Views: 2,409
    11-25-2013, 05:50 PM Go to last post
  36. Question Modelling percentages in the closed interval [0-1]

    Hi all, I am trying to model percentages which are in the closed interval . Specifically, I am not modelling the probability of a yes/no outcome...

    Started by JohnDoe2014‎, 01-08-2014 06:23 PM
    closed interval, logit, percentages
    • Replies: 11
    • Views: 2,799
    01-10-2014, 11:14 AM Go to last post
  37. Interpreting regression model

    Hello, I want to know what is the best explanation for interpreting this regression model: Ln(urban population)= -1.8 +...

    Started by Bahareh‎, 01-31-2014 05:56 AM
    • Replies: 11
    • Views: 2,032
    01-31-2014, 10:36 AM Go to last post
  38. 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: 2,587
    09-10-2014, 11:55 AM Go to last post
  39. 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: 2,357
    02-12-2015, 08:47 AM Go to last post
  40. 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: 2,164
    01-26-2015, 04:19 PM Go to last post
  41. 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: 3,560
    09-10-2015, 10:52 AM Go to last post
  42. Logistic Regression predicted probability is either 1 or 0 (or literally 2.2204E-16)

    I am doing a test logistic regression to predict whether employees will stay in the company for more than 3 years. After the model is trained, the...

    Started by Rizer‎, 01-01-2016 01:35 AM
    logistic regression
    • Replies: 11
    • Views: 2,988
    01-03-2016, 01:28 PM Go to last post
  43. Solving Multicollinearity Issues

    Dear Community, Currently I am modeling a multiple regression for a research project with Stata. I want to examine the influence of...

    Started by AntonR‎, 02-05-2016 09:53 AM
    • Replies: 11
    • Views: 2,258
    02-22-2016, 08:59 AM Go to last post
  44. Analysing a designed experiment - is the theory wrong?

    hi, just had a scary thought . in all industrial DoEs we definitely have measurement error on the IVs. However I have always seen the OLS as the...

    Started by rogojel‎, 07-17-2016 12:06 AM
    • Replies: 11
    • Views: 1,357
    07-18-2016, 11:07 AM Go to last post
  45. Condition to put regression analysis zero?

    Under what situation intercept can be force to zero in regression analysis?

    Started by Meenakshi Tiwari‎, 05-13-2017 02:34 AM
    • Replies: 11
    • Views: 1,522
    05-14-2017, 10:36 PM Go to last post
  46. OLS vs solving a system of linear equaions

    If i want to solve y=Xb, where y is a vector of observations and X a matrix of independent variables i could use ordinary least squares to estimate...

    Started by Prometheus‎, 09-14-2017 07:49 AM
    • Replies: 11
    • Views: 463
    09-20-2017, 08:06 AM Go to last post
  47. transform y to log(y)

    Hi, I'm wondering what kind of data is appropriate for transforming the response y into log(y)? ( So the model becomes log(y)= a^x1 +...

    Started by zzzc‎, 10-22-2010 08:12 PM
    • Replies: 10
    • Views: 7,261
    11-08-2010, 01:43 PM Go to last post
  48. interaction in logistic regression

    Hi, I have run a moltinomial logistic regression and wanted to test for moderation effects of some variables so I tested the model with main effects...

    Started by Sciarada‎, 06-30-2011 08:48 PM
    interaction effect, likelihood ratio test, logistic regression
    • Replies: 10
    • Views: 5,268
    07-01-2011, 08:03 PM Go to last post
  49. which model to use?

    I have a dependent variable that is limited and discrete (it goes from -9 to 9 in whole numbers), yet the residuals produced from a linear regression...

    Started by danjohnson10‎, 07-12-2011 04:46 PM
    • Replies: 10
    • Views: 3,242
    08-03-2011, 01:34 PM Go to last post
  50. Linear Regression Without intercept ?

    hello i m little confuse i want to know that when its is suitable to use regression without intercept ? Any advantage over using linear regression...

    Started by wahibr‎, 08-20-2011 03:37 AM
    • Replies: 10
    • Views: 28,631
    08-21-2011, 02:34 AM Go to last post
  51. Another Regression Question

    Hey everybody. I'm at it again with regression questions. If you have the time to help me with some questions I would appreciate it. Using...

    Started by USMstudent85‎, 10-14-2011 11:26 AM
    • Replies: 10
    • Views: 2,870
    10-14-2011, 01:37 PM Go to last post
  52. application of regression model - which one to choose? please help

    Hi all, for my master thesis I would like to investigate the human impact on behavior of sea lions. I have 3 different defined response variables...

    Started by KathiF‎, 11-17-2011 11:34 AM
    • Replies: 10
    • Views: 3,142
    11-22-2011, 02:03 PM Go to last post
  53. Logistic regression (firm-level and country-level variables)

    I am new to logistic regression and wonder how I can combine firm-level variables and country-level variables into the same regression. For the...

    Started by lucas111‎, 01-02-2012 11:39 AM
    logistic regression
    • Replies: 10
    • Views: 2,883
    01-02-2012, 10:45 PM Go to last post
  54. Simple Question Seasonal Autoregressive Model

    Hi, I hope I'm posting this in an appropriate place. It's not exactly linear regression. If you have a seasonal moving average model like...

    Started by Time Serious‎, 01-10-2012 05:58 AM
    arima, auto-regressive, forecasting, seasonal, time series
    • Replies: 10
    • Views: 3,143
    01-11-2012, 02:27 PM Go to last post
  55. [SOLVED] How to interpret negative regression estimate?

    Hi, Im learning about regression analysis and have negative estimates for the grade-point average variable in two categories of a multinomial...

    Started by elle-mnop‎, 02-02-2012 05:50 PM
    • Replies: 10
    • Views: 4,775
    02-03-2012, 03:10 AM Go to last post
  56. too many dummy variables

    Hello I have a categorical independent variable, with 11 levels...so I need 10 dummy variables. I wanted to ask how can I analyze 10 dummy...

    Started by NN_STAT‎, 07-19-2012 12:15 PM
    • Replies: 10
    • Views: 7,434
    07-20-2012, 02:55 AM Go to last post
  57. Question Urgent Help Required.....

    Dear all, i am doing a research these days. but i am facing a difficulty in statistics analysis. Actually i have measured a quantity "A" in the...

    Started by imtii‎, 11-30-2012 08:59 AM
    • Replies: 10
    • Views: 1,969
    11-30-2012, 09:37 AM Go to last post
  58. Question on Interpreting Variable/Model Specification

    Hello, I'm currently trying to run a model displaying the relationships of my independent variables with interactions on a feeling thermometer. The...

    Started by TheK90‎, 04-25-2013 05:34 PM
    • Replies: 10
    • Views: 2,072
    04-30-2013, 11:26 AM Go to last post
  59. Multiple regression analysis for 3 groups

    Hi I am doing a multiple regresion analysis for my project. If I have 3 groups which are nominal data (nationality: PL, ENG, and PL who moved to...

    Started by ilona‎, 03-07-2013 04:48 PM
    • Replies: 10
    • Views: 3,099
    03-10-2013, 05:01 PM Go to last post
  60. Violation of linearity assumption

    Hi, I'm a beginner at statistics. I'm doing a simple linear regression and I have a scatterplot of the residuals versus the predicted values and I...

    Started by Elodin‎, 03-07-2013 03:15 PM
    • Replies: 10
    • Views: 4,667
    03-09-2013, 10:47 AM Go to last post

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