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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Nonlinear regression of non normal asymetric data

    Hi! I have a set of data that is dependent on 3 dependent variables. The data is collected over a time period tvice a day. I have a theoretical...

    Started by Peter Olsson‎, 09-01-2011 12:50 PM
    • Replies: 1
    • Views: 2,596
    09-01-2011, 01:35 PM Go to last post
  2. multiple sets of data fitted to one distribution

    Hello everyone, I'm new to this board so I hope I'm putting this in the right section. I have multiple sets of data which fit the same...

    Started by paul00‎, 09-01-2011 01:15 AM
    • Replies: 1
    • Views: 2,478
    09-01-2011, 01:34 AM Go to last post
  3. Multiple regression analysis: Significant regression model, insignificant predictors

    With regards to the title above, my multiple regression model has a significant F value but none of the predictors are significant. All the...

    Started by Serene‎, 08-19-2011 12:16 AM
    • Replies: 6
    • Views: 12,888
    08-30-2011, 04:51 PM Go to last post
  4. Panel Data Regression using Stata/SPSS

    Please I need help. I am trying to run multiple regression analysis using SPSS and Stata but what am getting is not good at all. Can anybody help?...

    Started by Dele‎, 08-30-2011 05:56 AM
    • Replies: 0
    • Views: 4,669
    08-30-2011, 05:56 AM Go to last post
  5. Appropriate Coding of DV in logistic regression

    Good morning! I have the following problem with a logistic regression that relates German graduates' attributes (subject, univerity type, degree,...

    Started by siskin‎, 08-23-2011 08:02 AM
    • Replies: 2
    • Views: 3,564
    08-30-2011, 02:43 AM Go to last post
  6. Trend data with categorical independent variables

    I have 4 time points (future timepoints will be added shortly) measured for each company (about n=150). Each company is associated with one of 20...

    Started by shanehall.m‎, 08-29-2011 10:37 AM
    categorical data, rates, time series
    • Replies: 0
    • Views: 2,113
    08-29-2011, 10:37 AM Go to last post
  7. homework problem

    I have to find a linear model that explains the variable "days to death" based on the other variables. I can't upload the data. If you want to help...

    Started by Pat07‎, 08-29-2011 05:48 AM
    • Replies: 0
    • Views: 1,573
    08-29-2011, 05:48 AM Go to last post
  8. How does correlation work?

    Dear All, I am a beginner to statistics. I have a pretty basic question. If I have 2 variables X and Y, how does E produce a no which measures...

    Started by john2011‎, 08-28-2011 09:55 PM
    correlation
    • Replies: 2
    • Views: 4,375
    08-28-2011, 11:03 PM Go to last post
  9. Moderated multiple regression and mixed factorial ANOVA

    I conducted a moderated multiple regression and a mixed factorial ANOVA on the same variables and got two different results (using moderated multiple...

    Started by acue‎, 06-06-2011 10:48 PM
    • Replies: 5
    • Views: 7,457
    08-27-2011, 03:52 PM Go to last post
  10. (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: 4,831
    08-27-2011, 02:33 PM Go to last post
  11. Multiple Moderated Regression Help!

    Hi folks, i need help regarding multiple moderated regresison analysis in SPSS. I have one independent variable (X), one Dependent variable (Y)...

    Started by nouman‎, 08-26-2011 02:41 PM
    moderated multiple regres
    • Replies: 3
    • Views: 3,470
    08-27-2011, 09:42 AM Go to last post
  12. year fixed effects in time series regression

    I'm trying to estimate what effect the tariff rate in a specific country has on evasion of tariffs (or rather the underreporting of the value of...

    Started by oscarscheja‎, 08-26-2011 03:23 AM
    dummy variables, fixed effects, time series
    • Replies: 0
    • Views: 3,809
    08-26-2011, 03:23 AM Go to last post
  13. Poisson regression and effects of predictors

    Dear all, I just registered this forum too, since I am in doubt what to do! In a study, I want to determine the effects of grazing by animals...

    Started by jaofik‎, 08-23-2011 02:58 PM
    • Replies: 4
    • Views: 5,590
    08-24-2011, 06:50 AM Go to last post
  14. Unhappy Regression Help for Masters thesis

    ..........

    Started by Parikshit Luktuke‎, 08-23-2011 09:49 PM
    • Replies: 4
    • Views: 6,222
    08-24-2011, 12:55 AM Go to last post
  15. Relative contribution of variables in logistic regression

    Hi, I have been using logistic regression to determine what influences the chances of a person becoming unemployed. A number of variables have all...

    Started by lmsava‎, 08-22-2011 04:11 PM
    • Replies: 5
    • Views: 20,361
    08-23-2011, 05:18 AM Go to last post
  16. Least square estimates

    (y1, x1)...(yn, xn) and (w1,x1),.....(wn,xn) are independent oberservations where x1...xn are fixed constants. Suppose we fit the first model yi = a1...

    Started by Cookie‎, 08-22-2011 02:51 AM
    • Replies: 3
    • Views: 5,243
    08-22-2011, 11:49 PM Go to last post
  17. Multiple Linear Regression Model- Help for Prediction

    Hi, I am trying to predict protein solvent accessibility using R, and I need some help. So, I have set of 270 proteins with 76,000 residue. The...

    Started by smileee‎, 08-22-2011 05:32 PM
    • Replies: 0
    • Views: 2,620
    08-22-2011, 05:32 PM Go to last post
  18. 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: 28,720
    08-21-2011, 02:34 AM Go to last post
  19. Multiple Linear Regression in Environmental Justice Analysis

    Hi, I have 982 data points (census block groups) for which I have information on % minority and low income, and levels of air pollution. I did MLR...

    Started by aida‎, 08-18-2011 03:09 PM
    • Replies: 3
    • Views: 3,140
    08-18-2011, 04:50 PM Go to last post
  20. interval valued data regression

    Hi all, Im just wondering if there is some way how to handle interval valued data regression? To be more specific I will just briefly describe my...

    Started by mihy255‎, 08-16-2011 03:06 PM
    • Replies: 0
    • Views: 1,989
    08-16-2011, 03:06 PM Go to last post
  21. Research Question Regarding Logistic Regression

    Hi all, I am conducting a medical study with n=179 subjects and have something like 30 independent variables that I am comparing to 1 outcome. I...

    Started by DanMed‎, 08-15-2011 02:48 PM
    • Replies: 3
    • Views: 2,782
    08-16-2011, 12:32 PM Go to last post
  22. Help with collinearity

    Hi, I have a collinearity problem with my data. How do I deal with this? the variable which has collinearity is important, so I can't remove it from...

    Started by dinsya‎, 08-11-2011 04:27 PM
    collinearity
    • Replies: 3
    • Views: 2,431
    08-16-2011, 10:40 AM Go to last post
  23. Unhappy regression results interpretation help!

    Hi everyone, this is my first post, I have this regression CSAD=a +B|R|+CSAD-1+CSAD-2+e where CSAD is the cross sectional absolute deviation of...

    Started by callput‎, 08-14-2011 08:04 AM
    • Replies: 13
    • Views: 4,937
    08-16-2011, 08:11 AM Go to last post
  24. Hypothesis

    If you got this model: mode 1) y=a +b1x1 + b2x2 + u and this: mode 2) y=a + b1(x1-x2) + u What do you call the restriction there has...

    Started by Mikkelsoeren‎, 08-14-2011 05:31 PM
    2 Pages
    1 2
    • Replies: 19
    • Views: 5,643
    08-15-2011, 09:21 AM Go to last post
  25. Homework, I Need help please

    I got 3 models about the American election: 1) y=a+B1*x1 + B2*x2 + u 2) log(y)=a+B1*x1+B2*x2 + u 3) y=a + B1(x1-x2) + u where:...

    Started by Mikkelsoeren‎, 08-13-2011 07:15 PM
    • Replies: 1
    • Views: 2,247
    08-15-2011, 06:30 AM Go to last post
  26. Mini job

    Hello, are there anyone who are interested in a mini job about regression analysis? Thank you MikkelSoeren

    Started by Mikkelsoeren‎, 08-14-2011 10:22 AM
    • Replies: 0
    • Views: 1,919
    08-14-2011, 10:22 AM Go to last post
  27. Logistic Regression

    Hi Everyone, I'm new here and this is my second post. I am doing research with patients and their believes about medicine. I have one spreadsheet...

    Started by fred_1‎, 07-06-2011 07:51 AM
    • Replies: 5
    • Views: 2,344
    08-13-2011, 09:17 AM Go to last post
  28. multicolinearity of dummy and numerical variables

    Hello, I saw few related messages concerning multicolinearity in this Forum but it did not clared out in my case. So, I have general linear model...

    Started by martynasbucas‎, 08-12-2011 12:05 PM
    • Replies: 0
    • Views: 2,243
    08-12-2011, 12:05 PM Go to last post
  29. need urgent replies (multiple regression)

    I am totally confused with how to explain the outcome of multiple regression.i have to submit a project tommorow.i am a dumb i know but i need help i...

    Started by jimmy_uk‎, 08-11-2011 02:58 PM
    need urgent reply, regression analysis
    • Replies: 2
    • Views: 2,026
    08-12-2011, 05:43 AM Go to last post
  30. Multiple Experimental Conditions/MANOVA

    Hi, I'm new to SPSS and am not sure which tests I need to run to analyze my data. I want to compare product evaluations across 4 experimental...

    Started by garou22‎, 08-10-2011 01:47 PM
    • Replies: 2
    • Views: 2,449
    08-10-2011, 03:03 PM Go to last post
  31. Ncaaf multiple regression

    I want to do a mutiple regression analysis, with one of my independent variables being the number of seniors, juniors, ... On a football team. I...

    Started by Kimberly‎, 08-09-2011 05:43 PM
    • Replies: 5
    • Views: 2,882
    08-10-2011, 12:19 PM Go to last post
  32. Multiple Linear Regression problem

    Hi Guys, I am breaking my head with a problem, maybe you can help me.... I have a sensor, sensitive to gas. I need to model the response of the...

    Started by NN_STAT‎, 08-09-2011 01:33 AM
    • Replies: 2
    • Views: 1,730
    08-09-2011, 03:17 PM Go to last post
  33. A new comer has a question about multicollinearty problem

    I am running a OLS model with 9 IVs. The model results are good (a fitting model), but I got a high negative multicollinearity problem for two IVs...

    Started by TanXi‎, 07-23-2011 09:45 AM
    • Replies: 3
    • Views: 2,411
    08-09-2011, 02:51 PM Go to last post
  34. Fitting data with Cauchy-noise

    Not sure if this is the right board to post this on, but perhaps someone can help me. I've got two sets of data that can be modeled as something...

    Started by gct‎, 08-09-2011 10:30 AM
    • Replies: 0
    • Views: 1,658
    08-09-2011, 10:30 AM Go to last post
  35. Regression with replicates? ANCOVA?

    Hello, I am confused, I think that the problem is really simple, but somehow cannot get hold of this. First, the simpler question. I have...

    Started by jw3‎, 08-09-2011 09:23 AM
    • Replies: 0
    • Views: 1,755
    08-09-2011, 09:23 AM Go to last post
  36. Multiple Interaction terms in Logistic Reg

    Alright, it is Monday afternoon and my brain has shut down. It took me ~ 10 minutes just to figure out where to click in order to make this post. ...

    Started by hlsmith‎, 08-08-2011 03:09 PM
    • Replies: 1
    • Views: 2,345
    08-09-2011, 05:19 AM Go to last post
  37. Variance of error

    With the equation yi = B0 + B1xi + ei Does anyone know what the variance of ei_hat is suppose to equal? So far I have tried to split it the ei...

    Started by Cookie‎, 08-08-2011 01:15 AM
    • Replies: 0
    • Views: 3,294
    08-08-2011, 01:15 AM Go to last post
  38. Sum of Residual equal to zero

    I want to know why when you multiply the residual by Y_hat the sum of this new equation is still zero? So in other words I have summation from 1...

    Started by Cookie‎, 08-05-2011 09:49 PM
    • Replies: 4
    • Views: 10,302
    08-07-2011, 11:17 PM Go to last post
  39. Appropriate Statistical Method :: Nonlinear Dynamic System Identification

    Hey, I should probably mention beforehand, that I am relatively new to statistics. My problem is the following: I am doing nonlinear dynamic...

    Started by Coooky‎, 08-06-2011 08:31 AM
    • Replies: 0
    • Views: 1,603
    08-06-2011, 08:31 AM Go to last post
  40. Analytical linear regression?

    My lecturer stated that no method exists to determine the line of best fit for a set of data analytically. He went on to state that computers through...

    Started by striphe‎, 08-04-2011 06:32 AM
    • Replies: 6
    • Views: 5,279
    08-05-2011, 06:01 PM Go to last post
  41. 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: 3,249
    08-03-2011, 01:34 PM Go to last post
  42. Checking MI data residuals

    Hello, I was wondering, what is the best ways to check the residuals of a multiple linear regression on multiply imputed data? Is it a case...

    Started by Ri89‎, 08-02-2011 10:02 AM
    • Replies: 0
    • Views: 1,617
    08-02-2011, 10:02 AM Go to last post
  43. multiple linear regression on MI data

    Hello, I have just ran a stepwise multiple linear regression on multiply imputed data. I have R2, F and P values for the MLRs carried out on...

    Started by Ri89‎, 08-02-2011 09:50 AM
    • Replies: 0
    • Views: 1,443
    08-02-2011, 09:50 AM Go to last post
  44. warning - may require help

    Hello all you stats, and indeed non-stats, fowk I'm reasonably au fait with my stats methods. However, I don't have access to SPSS, which is my...

    Started by drewmac‎, 07-31-2011 10:09 PM
    • Replies: 1
    • Views: 1,771
    08-01-2011, 03:48 AM Go to last post
  45. Multiple Regression: Dependent Variable has sub-categories

    I want to be able to predict Total Spare Part Costs (Y). There are 2 types of spare parts contributing to the total costs. Let Spare Part 1 = SP1...

    Started by m007836‎, 07-17-2011 08:30 PM
    • Replies: 4
    • Views: 4,180
    07-31-2011, 06:07 PM Go to last post
  46. Entering control variables

    I'm looking for some help on if it's possible to enter aggregate level controls into individual level analyses. For example, if I'm looking at the...

    Started by lmsava‎, 07-29-2011 07:15 AM
    • Replies: 2
    • Views: 2,640
    07-31-2011, 04:49 AM Go to last post
  47. how to get the standard error of this formula?

    Hello. I am stuck in solving following 3 and 4 questions. What is the difference between constant term and intercept term? I cannot get the...

    Started by obermann‎, 07-30-2011 11:24 AM
    • Replies: 0
    • Views: 1,853
    07-30-2011, 11:24 AM Go to last post
  48. Iterative Fit With Unequally Spaced Data

    Hi all, I posted a couple days ago about a problem I was having fitting a discrete logistic decay curve. I received no replies, but after a couple...

    Started by gcjohns‎, 07-28-2011 12:38 PM
    • Replies: 2
    • Views: 2,134
    07-29-2011, 11:29 PM Go to last post
  49. The DV is binary, and two IVs are times series data, how to do regression?

    Hi guys, please help!!!! I want to do regression on a data having such fields: Loan_number Date default_nextmonth Unemployment_rate ...

    Started by Zhenni Li‎, 07-28-2011 12:42 PM
    • Replies: 1
    • Views: 2,056
    07-29-2011, 09:34 PM Go to last post
  50. deviance

    can anybody please tell me why we need to multiply difference of likelyhoods by "-2"? Where this 2 came from, why not 3? Could not find answer

    Started by antonitsin‎, 07-27-2011 02:25 PM
    deviance, glm diagnostocs
    • Replies: 3
    • Views: 2,175
    07-29-2011, 11:24 AM Go to last post
  51. Can I do this?

    Hey everyone :) I was wondering if I could do this. I have a dependent variable that is age. N = 228. Each participant answered a question which I...

    Started by hafrakaka‎, 07-28-2011 08:32 AM
    • Replies: 0
    • Views: 1,653
    07-28-2011, 08:32 AM Go to last post
  52. large measurement units - problem with interpretation and prediction....

    Hi there, The model seemed good and Rsq. high, but large measurement unit (in 10 power 9) of the response variable seem to be problem.... When...

    Started by Sylviastat‎, 07-26-2011 03:51 PM
    • Replies: 4
    • Views: 2,683
    07-28-2011, 03:27 AM Go to last post
  53. Std deviation of correlation coefficient?

    Hi I've run a VAR model to find the correlation coefficient between two stock markets. Now I need to find the standard deviation of this...

    Started by Bill77‎, 07-27-2011 06:31 PM
    • Replies: 1
    • Views: 2,954
    07-27-2011, 07:29 PM Go to last post
  54. using utilities of different attribute levels (from conjoint analysis) in regression?

    In short, I am trying to measure factors influencing an intention-to-purchase a product, with use of a regression. However, some of my constructs...

    Started by bassya‎, 07-27-2011 06:13 AM
    conjoint analysis, part-worths, regression analysis, utilities, variable calculation
    • Replies: 1
    • Views: 2,385
    07-27-2011, 05:29 PM Go to last post
  55. pearson correlation with linear regression scenario please!

    I was wondering if anyone could give me an example of a pearson correlation with linear regression scenario?

    Started by Japetto‎, 07-27-2011 08:11 AM
    • Replies: 1
    • Views: 2,944
    07-27-2011, 05:22 PM Go to last post
  56. Undergrad Logistic Decay Curve Fitting Problem

    Hi all, I am an undergrad currently working on ecology population models and I have run into a curve-fitting problem that has puzzled me for about a...

    Started by gcjohns‎, 07-27-2011 01:01 AM
    • Replies: 0
    • Views: 3,352
    07-27-2011, 01:01 AM Go to last post
  57. Power-law relation (Help Please)

    Hi there, I wonder if you can kindly help me with questions below 1) I have data to apply for a power-law relation (A=B*C^D). I am using excel to...

    Started by dara‎, 07-23-2011 04:13 PM
    • Replies: 3
    • Views: 2,211
    07-26-2011, 09:28 PM Go to last post
  58. including population as control when dependent variable is defined as per-capita?

    Hi all, So I have a model where the dv is per-capita spending and I wonder whether it would be appropriate to include population as a control...

    Started by lobeam‎, 07-26-2011 08:25 PM
    • Replies: 0
    • Views: 1,834
    07-26-2011, 08:25 PM Go to last post
  59. Multiple linear regression on rank transformed data - good way to deal with outliers?

    Hi, I am looking to see if a number of different environmental factors could affect production of a metabolite. I ran a stepwise multiple...

    Started by Ri89‎, 07-26-2011 02:16 PM
    • Replies: 0
    • Views: 2,833
    07-26-2011, 02:16 PM Go to last post
  60. Linear mixed models vs conditional likelihood

    Hey guys, Thought I'd share something interesting that I came across yesterday with another biostatistician. See what you guys think. ...

    Started by Link‎, 07-26-2011 10:33 AM
    • Replies: 0
    • Views: 1,706
    07-26-2011, 10:33 AM Go to last post

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