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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. 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: 2,957
    07-17-2011, 07:17 PM Go to last post
  2. Regression with "fuzzy" values

    Hello Stats-People, I want to do a regression analysis. Therefore I have my dependent variable in a metric format (values ranging from 0.7-10000)....

    Started by JRadinger‎, 07-17-2011 12:48 PM
    • Replies: 2
    • Views: 1,821
    07-18-2011, 03:40 AM Go to last post
  3. 'Key Drivers of Satisfaction Analysis' - Help Please!

    For a project I am undertaking, I have carried out an extensive survey of satisfaction. I have a list of criteria ranked with the level of customer...

    Started by StaisticallyAmateur‎, 07-18-2011 08:28 AM
    • Replies: 0
    • Views: 1,989
    07-18-2011, 08:28 AM Go to last post
  4. An easy question about Generalized Linear Model

    Hello everyone, I just started using GLM and was stuck by an easy question of GLM. If I already obtain the estimates of the parameters, let's...

    Started by copyfriend‎, 07-18-2011 01:11 PM
    • Replies: 4
    • Views: 2,342
    07-18-2011, 02:02 PM Go to last post
  5. Gretl - Pooled Time Series Cross Sectional Data

    I've been working on a multiple regression analysis on bank failures using a probit model. I am currently using cross sectional data but I would...

    Started by Rosie‎, 07-18-2011 03:18 PM
    gretl, panel, probit, regression, time series
    • Replies: 1
    • Views: 5,286
    07-18-2011, 05:35 PM Go to last post
  6. New here, I have a question about checking if a set of numbers are regressive

    Hi! I'm new here, I'd like to know how does one check if a set of data is regressive? Thanks.

    Started by Tzu Chjeh Wu‎, 07-19-2011 01:07 AM
    • Replies: 1
    • Views: 1,863
    07-19-2011, 01:27 AM Go to last post
  7. Testing for tau equivalence in a simple CFA model, based on correlation matrix

    For an assignment we are provided with only a (polychoric) correlation matrix. One of the questions concerns the different measurement models that...

    Started by mhermans‎, 07-19-2011 07:28 AM
    • Replies: 0
    • Views: 4,051
    07-19-2011, 07:28 AM Go to last post
  8. Basic information on binary logistic regression

    Can anyone point me in the direction of a webpage that provides an overview of the binary logistic regression technique and ideally instructions on...

    Started by chrisquinze‎, 07-19-2011 06:09 AM
    • Replies: 1
    • Views: 3,016
    07-19-2011, 08:27 AM Go to last post
  9. Linear regression of autocorrelated time series

    Hi everyone, I am doing an analysis of two time series using linear regression. Now I would like to now if the regression coefficient and...

    Started by katep‎, 07-19-2011 04:15 PM
    • Replies: 0
    • Views: 2,092
    07-19-2011, 04:15 PM Go to last post
  10. Comparison of non-linear regressions from two different samples

    Hi at all! I got a big problem during my data analysis and I’m already looking for a solution a few days. I hope somebody here can help me. I...

    Started by gadus‎, 07-19-2011 01:09 PM
    • Replies: 1
    • Views: 6,401
    07-19-2011, 08:13 PM Go to last post
  11. Comparison of linear and power law regression models

    I'm quite a newb at statistics, with only one college-level statistics course behind me. I apologize in advance if my terminology and/or...

    Started by eis‎, 07-20-2011 01:43 PM
    comparison, geomorphology, linear, power law
    • Replies: 0
    • Views: 3,232
    07-20-2011, 01:43 PM Go to last post
  12. Coefficients in linear regression

    hi i am using spss 17.0 i am using linear regression to predict behaviours for the coefficent output does the constant and the indperpentant...

    Started by aarong‎, 07-21-2011 09:15 AM
    • Replies: 6
    • Views: 3,429
    07-21-2011, 03:32 PM Go to last post
  13. Regression interpretation

    Hey guys, I'm doing an OLS regression with an ending balance (econometrics class) as my dependent variable and the S&P 500 (among others) as my...

    Started by sfspitfire23‎, 07-22-2011 01:14 PM
    • Replies: 0
    • Views: 3,260
    07-22-2011, 01:14 PM Go to last post
  14. standardised coefficients

    Hi there, I have a basic question - SPSS output gives me unstandardized coefficients and standardized coefficient (the latter looking much nicer -...

    Started by Sylviastat‎, 07-23-2011 03:44 PM
    • Replies: 7
    • Views: 3,732
    07-23-2011, 04:51 PM Go to last post
  15. Mixed effects modelling

    Hey all, Im building a linear mixed effects model of a variable, lets say the headway time maintained by drivers in car following situations. I...

    Started by Andre Fernandez‎, 07-24-2011 07:12 AM
    linear regression, matlab, mixed effects models
    • Replies: 0
    • Views: 1,470
    07-24-2011, 07:12 AM Go to last post
  16. what changes if I add an autoregressive AR(..) term?

    Hello everyone! I'm working on a time series regression, which I want to keep linear. I have trouble with serial correlation, there is serious...

    Started by konherr‎, 07-25-2011 10:21 AM
    • Replies: 0
    • Views: 2,292
    07-25-2011, 10:21 AM Go to last post
  17. 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: 1,691
    07-26-2011, 10:33 AM Go to last post
  18. 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: 2,799
    07-26-2011, 02:16 PM Go to last post
  19. 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: 1,825
    07-26-2011, 08:25 PM Go to last post
  20. 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: 2,187
    07-26-2011, 09:28 PM Go to last post
  21. 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: 3,338
    07-27-2011, 01:01 AM Go to last post
  22. 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: 2,924
    07-27-2011, 05:22 PM Go to last post
  23. 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: 2,368
    07-27-2011, 05:29 PM Go to last post
  24. 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: 2,934
    07-27-2011, 07:29 PM Go to last post
  25. 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: 2,655
    07-28-2011, 03:27 AM Go to last post
  26. 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: 1,643
    07-28-2011, 08:32 AM Go to last post
  27. 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: 2,170
    07-29-2011, 11:24 AM Go to last post
  28. 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: 2,046
    07-29-2011, 09:34 PM Go to last post
  29. 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: 2,126
    07-29-2011, 11:29 PM Go to last post
  30. 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: 1,840
    07-30-2011, 11:24 AM Go to last post
  31. 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: 2,632
    07-31-2011, 04:49 AM Go to last post
  32. 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: 4,153
    07-31-2011, 06:07 PM Go to last post
  33. 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: 1,752
    08-01-2011, 03:48 AM Go to last post
  34. 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: 1,438
    08-02-2011, 09:50 AM Go to last post
  35. 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: 1,609
    08-02-2011, 10:02 AM Go to last post
  36. 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: 3,239
    08-03-2011, 01:34 PM Go to last post
  37. 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: 5,263
    08-05-2011, 06:01 PM Go to last post
  38. 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: 1,594
    08-06-2011, 08:31 AM Go to last post
  39. 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: 10,251
    08-07-2011, 11:17 PM Go to last post
  40. 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: 3,265
    08-08-2011, 01:15 AM Go to last post
  41. 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: 2,320
    08-09-2011, 05:19 AM Go to last post
  42. 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: 1,745
    08-09-2011, 09:23 AM Go to last post
  43. 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: 1,644
    08-09-2011, 10:30 AM Go to last post
  44. 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: 2,395
    08-09-2011, 02:51 PM Go to last post
  45. 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: 1,711
    08-09-2011, 03:17 PM Go to last post
  46. 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: 2,837
    08-10-2011, 12:19 PM Go to last post
  47. 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: 2,432
    08-10-2011, 03:03 PM Go to last post
  48. 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: 2,015
    08-12-2011, 05:43 AM Go to last post
  49. 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: 2,235
    08-12-2011, 12:05 PM Go to last post
  50. 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: 2,326
    08-13-2011, 09:17 AM Go to last post
  51. 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: 1,907
    08-14-2011, 10:22 AM Go to last post
  52. 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: 2,231
    08-15-2011, 06:30 AM Go to last post
  53. 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: 5,626
    08-15-2011, 09:21 AM Go to last post
  54. 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: 4,921
    08-16-2011, 08:11 AM Go to last post
  55. 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: 2,412
    08-16-2011, 10:40 AM Go to last post
  56. 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: 2,766
    08-16-2011, 12:32 PM Go to last post
  57. 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: 1,971
    08-16-2011, 03:06 PM Go to last post
  58. 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: 3,119
    08-18-2011, 04:50 PM Go to last post
  59. 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: 28,596
    08-21-2011, 02:34 AM Go to last post
  60. 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: 2,602
    08-22-2011, 05:32 PM Go to last post

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