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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Selecting Variables for Multiple Regression (Univariate Significance Levels)

    Hi All! I really hope someone can answer my question. I am building multiple linear regressions and I am testing salient variables one by one at...

    Started by Pranaphish‎, 08-27-2013 10:18 PM
    multiple regression, p values, regression models, significance, univariate testing
    • Replies: 9
    • Views: 3,774
    08-28-2013, 07:35 PM Go to last post
  2. 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: 3,774
    01-27-2015, 02:01 PM Go to last post
  3. Logistic Regression Undersampling Weight

    Hi all, I am working on a logistic regression with rare events and I am implementing undersampling. My unadjusted model (without WEIGHT option) is...

    Started by Marcio_m_r‎, 05-13-2013 04:25 PM
    • Replies: 0
    • Views: 3,773
    05-13-2013, 04:25 PM Go to last post
  4. regression or remosre??!!

    what are the differences between remorse and regression????????????????????

    Started by haraharae‎, 09-12-2014 12:51 PM
    • Replies: 8
    • Views: 3,770
    09-13-2014, 05:19 AM Go to last post
  5. Cross validation bandwith selection

    Hi, is there a package in R for cross-validation optimal bandwith selection for nonaparemtric regression/autoregression functions estimation? (for...

    Started by Torch‎, 06-18-2011 03:46 AM
    • Replies: 1
    • Views: 3,766
    06-18-2011, 09:52 AM Go to last post
  6. Regression analysis of Likert Scale

    Hi all, I'm new to this site and conducting research in Physical therapy. I'm attempting to analyze data from surveys with likert scale...

    Started by wakerivets‎, 10-07-2011 01:58 PM
    • Replies: 1
    • Views: 3,765
    10-07-2011, 03:08 PM Go to last post
  7. Multiple Regression, Analysing Attachment Dimensions

    Hi, I am trying to do my analysis for my work but getting very confused. I am using multiple regression (SPSS version 17) and have my...

    Started by ajenki10‎, 08-11-2010 08:25 AM
    • Replies: 1
    • Views: 3,764
    08-11-2010, 09:58 AM Go to last post
  8. 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: 3,764
    07-23-2011, 04:51 PM Go to last post
  9. Are these models nested?

    I have three logistic regression models. Model 1 is the reference model with covariates GA + BW. Model 2 is a quadratic model with GA + BW +...

    Started by SiBorg‎, 11-11-2012 06:22 AM
    • Replies: 9
    • Views: 3,764
    11-11-2012, 04:37 PM Go to last post
  10. Help with Multiple Regression

    Hi all, im struggling with what to do with this multiple regression question, any help tips or pointers would be greatly appreciated! Am i...

    Started by Mosphaitus‎, 08-15-2008 08:35 AM
    • Replies: 6
    • Views: 3,761
    08-16-2008, 12:43 PM Go to last post
  11. interpreting log transformed co-effients in linear regression?

    Hello, I have 1 continuous dependent and 1 predictor variable that I've logarithmically transformed to normalise the data and their residuals for...

    Started by orangecrush‎, 12-30-2011 10:52 AM
    • Replies: 6
    • Views: 3,760
    12-31-2011, 12:03 PM Go to last post
  12. Multiple logistic regression models

    Hi Am I correct in saying that if my results from multiple logistic regression show that the full model does not differ significantly from the...

    Started by WTwine‎, 01-23-2008 07:58 AM
    • Replies: 5
    • Views: 3,759
    02-20-2008, 09:00 AM Go to last post
  13. Help with Regression Equation

    Hi, Basically I need help working out all the variables for a multiple regression equation. The equation used is: Y= X1 R1 + X2 R2 +....Xn Rn +...

    Started by billkarr‎, 04-27-2010 09:30 AM
    • Replies: 2
    • Views: 3,756
    04-27-2010, 10:49 AM Go to last post
  14. Did I just fudge this categorical data transformation too much?

    I have a public data set gathered from 336 hospitals, with about 28,000 rows. I want to see if there is relationship between a particular input...

    Started by greg.neyman‎, 05-02-2011 04:33 PM
    categorical data analysis, dummy variables
    • Replies: 7
    • Views: 3,754
    05-05-2011, 05:05 PM Go to last post
  15. Comparing regression equations

    I am thinking of trying to use the logit model to determine the probability of whether patients will participate in a particular health program. My...

    Started by Clouds1988‎, 02-07-2009 07:35 PM
    • Replies: 2
    • Views: 3,753
    02-08-2009, 11:31 AM Go to last post
  16. What are the weaknesses of bootstrapping OLS standard errors?

    What are the weaknesses of bootstrapping OLS standard errors using residuals and pairs bootstrapping methodology? I've seen many sources on this...

    Started by derksheng‎, 08-01-2012 12:07 AM
    • Replies: 4
    • Views: 3,753
    08-02-2012, 10:46 AM Go to last post
  17. Factor analysis vs logistic regression

    Factor analysis and logistic regression are methods which i have never used before. I really did not need to use them, well until now. My knowledge...

    Started by badibad‎, 10-02-2013 12:53 PM
    • Replies: 2
    • Views: 3,736
    10-03-2013, 02:24 PM Go to last post
  18. Unhappy Mean Squared Prediction Error?

    Hi, I am having trouble understanding how to use MSPE. Let's say I have 30 data points and then a sample of 4 of them is selected (the 'test...

    Started by TheFirstOrder‎, 04-12-2011 10:50 AM
    mspe
    • Replies: 0
    • Views: 3,734
    04-12-2011, 10:50 AM Go to last post
  19. Anova problems.........please help.thank you

    1.A study has been conducted to determine whether the mean spending for recreational activities during the month of August differs for residents of...

    Started by adeola1820‎, 04-23-2007 12:20 AM
    • Replies: 0
    • Views: 3,733
    04-23-2007, 12:20 AM Go to last post
  20. Interpretation equation Wald test when using Seemingly Unrelated Regression

    I am investigating the added value of commodities to a stock portfolio. Therefore, I use the Mean Variance Spanning test. Testing for spanning is...

    Started by rob1‎, 08-03-2013 04:54 PM
    • Replies: 0
    • Views: 3,732
    08-03-2013, 04:54 PM Go to last post
  21. Regression Analysis - positive correlation

    Hi, I am running a regression analysis using data for aircraft values. The problem that I have encountered is that GDP global and Oil Price are...

    Started by Lukaszlukasz007‎, 02-18-2010 05:07 AM
    • Replies: 6
    • Views: 3,721
    02-19-2010, 04:13 AM Go to last post
  22. R squared equals 1 in Stepwise regression analysis

    Hi I have carried out stepwise regression analysis using SPSS and the resulting r squared equals 1. I wonder if this R squared is acceptable or...

    Started by Rana‎, 11-13-2012 06:24 AM
    • Replies: 1
    • Views: 3,721
    11-13-2012, 09:25 AM Go to last post
  23. Regression on a non-normal dependant variable

    Hi there, This situation is new to me: I have non-normal DV, for which no proper non-linear transformation (that I know of) exists. It is a score...

    Started by do999‎, 05-24-2011 11:26 AM
    • Replies: 2
    • Views: 3,715
    05-24-2011, 12:33 PM Go to last post
  24. need help with regression problem asap!

    I have to do this problem but I have no idea how to interpret the data! Can somebody pleeeeeeeeeease help me?:wave: An object is thrown upward from...

    Started by pinkmari23‎, 12-06-2005 05:14 PM
    • Replies: 6
    • Views: 3,713
    12-13-2005, 12:26 PM Go to last post
  25. multiple linear regression

    Hello, I have an econometric model using multiple linear regression. lets say Q=alpha+beta*P1+gamma*P2+residuals I would like to ask if the...

    Started by xbender‎, 07-12-2010 05:43 AM
    • Replies: 2
    • Views: 3,713
    07-12-2010, 07:17 AM Go to last post
  26. Breusch Pagen test ?! Urgent, how to report APA style

    Hi, I've uploaded an attachment of the residual plot I got from a multiple regression. That line of diagonal lines maks me think that there is...

    Started by clh2‎, 03-20-2014 01:16 PM
    • Replies: 3
    • Views: 3,713
    03-20-2014, 04:49 PM Go to last post
  27. Question Panel Data: Conducting N time-series regressions and averaging coefficients

    Hi, I stumbled upon a special regression method in a published paper (A+ journal) that I hadn't heard before. In dealing with a panel data set, the...

    Started by Steve06‎, 05-23-2011 12:32 AM
    fixed effects, linear regression, panel, paper
    • Replies: 3
    • Views: 3,710
    04-02-2013, 10:07 PM Go to last post
  28. Another question about regression

    First, thank you to John and Quark for responding to my question about multiple regression!!!! I have another question. I am using SPSS and...

    Started by Diane‎, 11-20-2005 12:17 PM
    • Replies: 1
    • Views: 3,708
    11-20-2005, 12:25 PM Go to last post
  29. Exclamation How do I begin????

    I just need to know how to begin this excel process; Develop an estimated regression equation that can be used to predict the fuel efficiency for...

    Started by rufus12‎, 04-07-2013 10:12 PM
    • Replies: 1
    • Views: 3,707
    04-08-2013, 04:48 PM Go to last post
  30. Odds Ratio Interpretation in Logistic Regression when input is Log-Transformed

    Hello, Lets us have a binary dependent variable with 1 as the event and 0 as the non-event. We model the probability of event. The independent...

    Started by zarasandreas‎, 10-21-2012 08:59 AM
    logistic regression, normality
    • Replies: 0
    • Views: 3,706
    10-21-2012, 08:59 AM Go to last post
  31. Covariance of residual

    I'm given the mutiple regression equation Y = XB + e I have to find the covariance between e_hat and Y First what I did was changed e_hat =...

    Started by Cookie‎, 09-03-2011 08:52 PM
    • Replies: 0
    • Views: 3,698
    09-03-2011, 08:52 PM Go to last post
  32. Bounded or unbounded? Which regression?

    Hi, I have to do a regression analysis with a dependent variable which ranges from -5 to 12. Its distribution is given below. Can anybody suggests...

    Started by sant2910‎, 06-28-2012 08:39 AM
    regression, unbounded
    • Replies: 1
    • Views: 3,698
    12-18-2014, 10:19 AM Go to last post
  33. Pooled OLS

    I've got a question concerning a regression analysis which I'm about to perform. The dataset contains pupils from six different years in a...

    Started by grandpa‎, 04-11-2012 03:49 AM
    • Replies: 0
    • Views: 3,691
    04-11-2012, 03:49 AM Go to last post
  34. Choosing the Best Regression Model

    I have been asked to build a predictive model of a population based on cost. The sample size of the population is 30k for the current test (with data...

    Started by JAH‎, 04-22-2011 03:48 PM
    • Replies: 0
    • Views: 3,687
    04-22-2011, 03:48 PM Go to last post
  35. Significant Correlation, Insignificant Regression

    Dear All, I have a highly significant correlation between two variables (A and B). When using a OLS method, however, the relationship between the...

    Started by TimoV‎, 05-09-2012 01:50 AM
    • Replies: 1
    • Views: 3,686
    05-10-2012, 06:06 PM Go to last post
  36. Point me in the right direction

    Hi there, I am currently trying to determine the relationship between a spot price and a contract price. My spot price is obviously moving...

    Started by marketing-grad‎, 11-29-2010 11:42 PM
    • Replies: 2
    • Views: 3,683
    11-30-2010, 01:00 AM Go to last post
  37. Urgent: Linear Regression - Survey Design - Help needed

    Hi everyone, For my master thesis, I am trying to prepare a survey on key success factors for virtual worlds. I want to do a linear regression...

    Started by Lisaly2345‎, 04-10-2008 10:28 AM
    • Replies: 5
    • Views: 3,680
    04-16-2008, 03:28 AM Go to last post
  38. Linear Regression Through a Point

    Hi Everyone, I'm trying to find the slope of the regression line with the least squares fit which passes through a certain point (x_0,y_0) The...

    Started by timmo567‎, 03-03-2011 03:48 AM
    • Replies: 0
    • Views: 3,676
    03-03-2011, 03:48 AM Go to last post
  39. working correlation matrix to use in generalized estimating equations

    I have a design with a between-subject variable (emotion) and within-subject variable (task type), and response data were binary (answer to a task:...

    Started by Yue‎, 04-15-2011 02:41 PM
    • Replies: 0
    • Views: 3,670
    04-15-2011, 02:41 PM Go to last post
  40. Standard errors in IV and 2SLS

    Hi guys, I'm running an instrumental variable regression and the same two stage least squares regression in R. I get the same coefficient...

    Started by Ageo7836‎, 05-20-2011 11:31 PM
    • Replies: 1
    • Views: 3,668
    05-21-2011, 06:47 AM Go to last post
  41. Question [stata] interaction terms in conditional logit

    Dear all, There is a famous paper by Norton et al. (2003) which describes why stata's wrong about interaction terms in logit regressions. They...

    Started by Erold‎, 05-07-2014 09:08 AM
    buis, interaction term, logit, norton
    • Replies: 2
    • Views: 3,667
    05-08-2014, 04:23 AM Go to last post
  42. Red face Stepwise Regression

    When a variable is added and then removed in stepwise regression, what happens to the proportion of the variance it explained?

    Started by kimrayjan‎, 01-21-2011 03:19 PM
    multiple regression, r square, stepwise, variance
    • Replies: 1
    • Views: 3,666
    01-23-2011, 01:06 AM Go to last post
  43. Reporting results of non-linear regression with centered variables

    Hi I have a regression y = a + b1(x) + b2(x^2) + ...bn + e when i run the regression b1 and b2 are significant (and of opposite sign) but...

    Started by steve1‎, 11-04-2014 11:55 AM
    • Replies: 3
    • Views: 3,659
    11-14-2014, 11:12 AM Go to last post
  44. Linear regression vs ancova - when to use which

    Hi all, I have some data on species richness, latitude and temperature. In the past on this sort of data I have used multi-linear regression. But it...

    Started by mikeywillcox‎, 03-29-2012 06:59 PM
    • Replies: 1
    • Views: 3,648
    03-29-2012, 07:11 PM Go to last post
  45. Orthogonal projection onto linear span.

    Hi there. I was hoping someone could give me a starting point on this problem because I'm clueless. given y = x1 =

    Started by c2q‎, 10-23-2011 08:45 PM
    • Replies: 3
    • Views: 3,647
    10-24-2011, 12:55 PM Go to last post
  46. Phonetics: Interactions without one of the main effects

    I am using a logistic regression model with bias reduction in order to predict the contrast between /b/ and /p/ in Ojibwe based on acoustic...

    Started by Adam J.R. Tallman‎, 04-22-2011 09:11 PM
    aic discriminant, interaction effect
    • Replies: 5
    • Views: 3,646
    04-23-2011, 03:32 PM Go to last post
  47. Std Error of nonlinear regression coefficients

    Hi There, I have a commercial NET dll computing nonlinear regression coefficients and their sigma values. However, I would like to compute the...

    Started by Dolphin72‎, 03-10-2011 08:11 PM
    coefficient, nonlinear, standard error
    • Replies: 0
    • Views: 3,643
    03-10-2011, 08:11 PM Go to last post
  48. plotting moderation

    Hi, I know that for most of you this will sound like a stupid question but I am teaching myself regression and I am quite new.. Does it make sense...

    Started by Sciarada‎, 07-02-2011 09:25 PM
    moderation plot, multinomial regression
    • Replies: 1
    • Views: 3,640
    03-16-2012, 09:30 AM Go to last post
  49. Sample Size Calculation for Multiple Regression

    Hi Everyone, I would like to apologize in advance for the question below, but my level of knowledge in statistics is mediocre at best. I am...

    Started by mikeme‎, 06-23-2011 01:50 PM
    • Replies: 2
    • Views: 3,639
    06-23-2011, 02:38 PM Go to last post
  50. Linear regression, nonlinear regression or something else?

    Hi! I do apologies in advance for any misuse of terms or the lack of understanding in statistics - as I've only realised, after Googling for hours,...

    Started by elispene‎, 03-16-2011 10:56 PM
    • Replies: 0
    • Views: 3,637
    03-16-2011, 10:56 PM Go to last post
  51. My regression has me confused!

    Can someone help me explain this? I did a stepwise multiple regression using the three factors. In Step 3, it shows the Bs in the order I...

    Started by Mcnuggets‎, 08-27-2006 12:49 PM
    • Replies: 2
    • Views: 3,635
    08-29-2006, 09:22 AM Go to last post
  52. Moderation analysis problems

    Hi girls and guys :) I'm pretty stuck rigth now with my moderation analysis. First of all, this is for my bachelor thesis, psychology. I've...

    Started by ChristophR‎, 05-15-2013 10:53 AM
    • Replies: 3
    • Views: 3,632
    05-21-2013, 02:42 PM Go to last post
  53. Growth Rates

    I have a huge panel data set consisting of thousands of firms for a time period of 8 years. I would like to transform some of my variables. For...

    Started by Statanoob‎, 12-08-2010 01:28 PM
    • Replies: 2
    • Views: 3,621
    12-09-2010, 05:39 AM Go to last post
  54. Question Formulas for : CVRMSE and Net Mean Bias

    Hi folks, I am in the energy industry, and we do linear/multilinear regressions stats. One of the concepts being introduced to supplement...

    Started by paluee‎, 02-03-2011 12:53 PM
    • Replies: 0
    • Views: 3,620
    02-03-2011, 12:53 PM Go to last post
  55. confidence intervals for linear regression

    Hi, newbie here, so please forgive the bad terminology. I started with ten years of historical data. I used Excel to give me a linear trendline and...

    Started by kins80‎, 01-10-2012 04:12 PM
    confidence interval, linear regression, trend analysis
    • Replies: 3
    • Views: 3,618
    01-11-2012, 09:13 PM Go to last post
  56. 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: 3,614
    09-10-2015, 10:52 AM Go to last post
  57. Complicated Research quesiton

    Im looking to do some research in the social science field and I have to do a statistical analysis of a complicated set of self report measures. I'd...

    Started by danmpc‎, 12-28-2016 06:52 AM
    • Replies: 8
    • Views: 3,611
    12-30-2016, 12:33 PM Go to last post
  58. Talking Observed versus Expected Slope Comparison

    Hello, I am performing an analysis (for dissertation project) where I am comparing the sum of branch lengths from phylogenetic trees reconstructed...

    Started by CrystalH‎, 03-22-2013 01:28 PM
    phylogenetic diversity, regression analysis, slope
    • Replies: 2
    • Views: 3,602
    03-22-2013, 07:57 PM Go to last post
  59. 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: 3,598
    01-28-2014, 01:07 PM Go to last post
  60. Question on Finding the Design Matrix

    For the above question, I was wondering if someone could help me find the design amtrix in question a) It seems like from the question tat there...

    Started by chrishello‎, 09-18-2012 08:05 AM
    • Replies: 9
    • Views: 3,591
    09-18-2012, 10:49 AM Go to last post

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