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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Prediction Region/Set from Multiple Logistic Regression

    Hello all, I'm not sure how easy or difficult the following question actually is but for all my efforts I haven't been able to find the answer, if...

    Started by chaps‎, 05-25-2011 04:24 AM
    • Replies: 9
    • Views: 4,877
    06-11-2011, 12:54 AM Go to last post
  2. Time Series Analysis with lags and non temporally consecutive values

    This is what i'm trying to do. Ive got a set of news surprise data (announced value-forecast) at the times of release. For example, I have 12 GDP...

    Started by CharlesOG‎, 09-12-2010 07:38 PM
    • Replies: 0
    • Views: 2,709
    09-12-2010, 07:38 PM Go to last post
  3. "No Observations"

    Hi, I was hoping someone might be able to help solve this problem. The values are all formatted as numeric. I'm regressing news announcements on...

    Started by CharlesOG‎, 09-13-2010 05:46 AM
    • Replies: 1
    • Views: 2,473
    09-13-2010, 07:57 AM Go to last post
  4. Repeated measures - appropriate for my study or not?

    Howdy folks - first time poster here. I'm a grad student at CU-Boulder working on grassland ecology and need some assistance. I've got six...

    Started by Charlie‎, 10-09-2008 01:58 PM
    • Replies: 1
    • Views: 2,784
    10-10-2008, 01:23 AM Go to last post
  5. 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: 13,576
    11-19-2008, 10:17 AM Go to last post
  6. Math Help: How to Calculate Weights for Multiplicative Model with Dummy Variables

    Hi Everyone, My question is how do I calculate weights for Y=W1X1*W2X2*WNXN where N is the number of independent variables. I could use...

    Started by CharlieBombay‎, 01-18-2017 11:52 AM
    coefficients, math, predictive model
    • Replies: 1
    • Views: 2,421
    01-18-2017, 04:51 PM Go to last post
  7. Predictions after mean-centred regression

    Hi, I wonder if anyone can help me with a problem I'm having. I just performed an ordinary (LS) regression in which both the dependent and...

    Started by CharlieMurphy‎, 07-02-2014 06:03 AM
    centering variables, least squares, log linear
    • Replies: 1
    • Views: 1,033
    07-02-2014, 01:18 PM Go to last post
  8. Unhappy Single parent-offspring regression

    Does anyone know how to do this? I can't find the web page I found with the full explanation:shakehead Failing that, I am carrying out a study...

    Started by charlotte22‎, 03-08-2012 03:03 AM
    • Replies: 0
    • Views: 2,995
    03-08-2012, 03:03 AM Go to last post
  9. Testing heteroscedasticity statistically

    Hi everyone, I conducted a Breush-Pagantest and it is unsignificant, so there is no heteroscedasticity. My residual plot however looks pretty...

    Started by Charlotte_‎, 07-06-2015 03:20 AM
    breush-pagan, white's test
    • Replies: 2
    • Views: 2,026
    07-06-2015, 04:05 AM Go to last post
  10. Interactions in logistic regression - Please help

    Hi everyone, Currently I'm writing my thesis on the effects of divorce on children. It's a complex design so I guess I'll be posting more...

    Started by Charlotte_‎, 06-25-2015 03:08 AM
    dichotomous iv, interaction effects, logistic regression, multicollinearity
    • Replies: 2
    • Views: 1,312
    06-25-2015, 07:50 AM Go to last post
  11. Conducting a White's test in SPSS

    PLEASE anyone?? I'm really struggling here... Hi everyone, I've seen a tutorial on youtube on how to conduct a white's test in spss. I was...

    Started by Charlotte_‎, 07-10-2015 05:02 AM
    • Replies: 1
    • Views: 6,036
    07-10-2015, 05:44 AM Go to last post
  12. Simple question : Understanding an interaction - Gender as a moderator

    I wanted to see if gender has a moderating effect on the interaction between the age at divorce and trust in relationships. I centered the age at...

    Started by Charlotte_‎, 07-12-2015 04:01 AM
    • Replies: 3
    • Views: 1,391
    07-15-2015, 03:57 PM Go to last post
  13. Weighted Cases- Binomial Logistic Regression in SPSS

    I am currently using the HCUP KID federal database which employs discharge weights to better estimate the true number of cases. For example, I have...

    Started by CharTam‎, 07-21-2016 02:34 PM
    • Replies: 0
    • Views: 2,573
    07-21-2016, 02:34 PM Go to last post
  14. Need help badly!

    You have the ramp-servicing contract for a midsize car wash. For wash workers you use predominantly part time workers, all of whom have sufficient...

    Started by charterpilot‎, 09-08-2010 10:46 PM
    • Replies: 4
    • Views: 4,495
    09-09-2010, 03:49 PM Go to last post
  15. Linear regression, predictor contains same components as depedent variable

    I came across this model: y(t) = f (y(t-1), X) where y ia a centered 3-month average, for example, for aug'12, y=average of Jul, Aug and Sep...

    Started by chasegary‎, 10-21-2012 12:11 PM
    regression analysis, time series analysis
    • Replies: 1
    • Views: 1,001
    10-22-2012, 08:01 AM Go to last post
  16. Skewed dependent variable in logistic regression-how to handle

    I am conducting research on juvenile firesetting with a child's self report of firesetting as my dependent variable.(0= never played with or set...

    Started by chbowling‎, 11-07-2012 08:48 PM
    skewness regression
    • Replies: 4
    • Views: 6,605
    11-08-2012, 07:18 PM Go to last post
  17. Does vce(robust) correct not normally distributed errors (dependent variable)?

    Hello everyone, I have a question regarding the vce(robust) command in Stata. I have used this command for dealing with heteroskedasticity. I have...

    Started by CheersToStata‎, 07-24-2013 06:10 AM
    distribution, error term, vce(robust)
    • Replies: 0
    • Views: 1,323
    07-24-2013, 06:10 AM Go to last post
  18. PLS HELP! Regression with non-normally distributed errors

    Hello Everyone, I'm desperatelly looking for help regarding an regression analysis I'd like to conduct. Apparently the residuals/error terms of...

    Started by CheersToStata‎, 07-26-2013 05:03 AM
    2 Pages
    1 2
    • Replies: 15
    • Views: 5,033
    07-26-2013, 02:51 PM Go to last post
  19. Assessing the relationship between a continuous variable and categorical variables

    Hello! I have a problem for which I have trouble finding a solution. I would like to assess the relationship between a continuous dependent...

    Started by CheersToStata‎, 09-09-2013 11:32 AM
    • Replies: 2
    • Views: 2,919
    09-09-2013, 12:20 PM Go to last post
  20. Help! WLS + Bootstrap

    Hello everyone, I would like to do a weighted-least-squares regression through a nonparametric bootstrap in stata. Does anybody know how this...

    Started by CheersToStata‎, 01-16-2014 07:44 AM
    bootstrap, stata 12, wls
    • Replies: 3
    • Views: 2,160
    01-17-2014, 04:44 AM Go to last post
  21. Regression more than two Y variables

    Hi, sorry this is probably a very stupid question! I'm just trying to finish m thesis proposal and have just realised that my statistics are wrong. I...

    Started by cheesefeind‎, 02-04-2013 11:36 AM
    • Replies: 5
    • Views: 3,515
    02-04-2013, 02:12 PM Go to last post
  22. Need advice on methods to assess nested random effects ecology data

    Hi everyone, I am a PhD student working in forestry/ecology. More specifically, I am looking at the effects of harvesting on soil nutrient pools....

    Started by Cheffy‎, 02-26-2013 01:36 PM
    • Replies: 1
    • Views: 2,220
    03-01-2013, 12:17 PM Go to last post
  23. Nested or Repeated measures analysis for ecology data?

    This is a refinement of an earlier question I asked. ...

    Started by Cheffy‎, 03-01-2013 12:16 PM
    • Replies: 3
    • Views: 4,225
    03-18-2013, 11:03 AM Go to last post
  24. Regression sample size

    Members, Please let me know if i can do a regression analysis for a sample size 40 with 8 predictor variables?

    Started by chella‎, 01-20-2013 01:34 PM
    • Replies: 5
    • Views: 3,302
    01-24-2013, 05:24 AM Go to last post
  25. Multiple Linear Regression with categorical interaction?

    HI All, I'm not sure if what I am doing is correct. I have a continuous exposure variable, a continuous outcome variable and another variable...

    Started by chiccaboom‎, 10-21-2013 11:53 PM
    • Replies: 2
    • Views: 2,058
    10-22-2013, 08:51 AM Go to last post
  26. How to interpret Multiple Linear Regression Output from SPSS

    Hi All, I have completed a multiple linear regression in SPSS and I need a bit of help interpreting the results. dependent variable-score of...

    Started by chiccaboom‎, 10-23-2013 01:43 AM
    • Replies: 0
    • Views: 2,051
    10-23-2013, 01:43 AM Go to last post
  27. Multiple Linear Regression and likelihood Ratio Test

    Hi All, I have completed multiple regressions with one model including an interaction term, and the other not including the interaction term. ...

    Started by chiccaboom‎, 11-05-2013 09:44 PM
    • Replies: 4
    • Views: 5,586
    11-06-2013, 09:22 PM Go to last post
  28. Question Automated multivariate nonlinear regression

    I have 4,300 lines of data that looks like this in each column: IV1, IV2, IV3, DV1, DV2 It has five columns, three are IVs, two are DVs. How can I...

    Started by Chicken325‎, 02-26-2011 03:06 PM
    multiple regression
    • Replies: 1
    • Views: 2,897
    02-26-2011, 04:36 PM Go to last post
  29. Testing heteroskedasticity of error variance

    Hello, I'm trying to test the heteroskedasticity of the error variance by using BP test and Non-constant variance score test. However, I get very...

    Started by childofforest‎, 02-16-2013 01:18 AM
    • Replies: 0
    • Views: 2,679
    02-16-2013, 01:18 AM Go to last post
  30. Price endogeneity

    Hi experts, I am trying to make a demand model for hotel rooms using OLS regression. I got booking data for my hotel for 4 years and have the...

    Started by chillpill2007‎, 12-06-2013 07:23 PM
    • Replies: 2
    • Views: 1,456
    12-09-2013, 01:08 PM Go to last post
  31. 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
  32. adjusting a proportion score (controling for age)

    I have 20 yes/no ratings (did this product help you). People were able to rate as many of the 20 products as they used (on average people rated 5...

    Started by chinaplate‎, 12-15-2008 10:19 PM
    • Replies: 8
    • Views: 4,354
    12-15-2008, 11:23 PM Go to last post
  33. Not Significant Coefficients

    I've run a logit regression to estimate the probability of attending high school. I've done this for many years. The thing is that some coefficients...

    Started by chipi-arg‎, 05-23-2013 11:13 AM
    coefficient, logit, significance
    • Replies: 9
    • Views: 2,575
    06-05-2013, 11:29 AM Go to last post
  34. Not sure what kind of regression to run here, plus extra ?'s

    Hey there. Frustrated grad student who's never been good at math here. :P Suffering through a final project, could use some input. We're using...

    Started by chirs3‎, 12-17-2011 08:43 AM
    • Replies: 0
    • Views: 1,390
    12-17-2011, 08:43 AM Go to last post
  35. How exactly does MLR hold other things constant?

    Hi all, I have just signed up to the forum and I am quite inspired by the discussions. I have an intermediate level experience in statistics...

    Started by ChiSquare‎, 09-17-2013 02:32 AM
    • Replies: 2
    • Views: 2,997
    09-17-2013, 09:46 AM Go to last post
  36. Probit Regresion

    Hi all. What does categ.(factors) and count data mean in probit regression? Categ.(factors) mean covariate or something like that?

    Started by chivasrom‎, 04-30-2015 07:23 AM
    • Replies: 2
    • Views: 1,498
    04-30-2015, 07:51 AM Go to last post
  37. Probit Regression

    Hİ all. Hope everyone is great. I just want to ask a question. What are the assumptions of probit regression? Can you offer me a book about probit...

    Started by chivasrom‎, 08-04-2015 02:33 AM
    • Replies: 1
    • Views: 1,264
    08-04-2015, 03:39 AM Go to last post
  38. Chi-square instead of Multiple Regression Analysis

    Can someone help me? How can I explain that I used Chi-square test of association instead of Multiple Linear Regression Analysis because I had...

    Started by choco21lit‎, 05-21-2016 11:42 AM
    • Replies: 0
    • Views: 1,120
    05-21-2016, 11:42 AM Go to last post
  39. Regression Equation Porblem

    My regression equation doesn't seem to be matching up with my model/data. My equation is y= -11.844+0.559(x). I ran this regression in excel...

    Started by chocpretz‎, 12-03-2013 01:16 AM
    • Replies: 4
    • Views: 1,867
    12-03-2013, 02:26 PM Go to last post
  40. Two way repeated measures with zeros, non integer values, and non-normal distribution

    I would really appreciate some help with a few models I am trying to run. Essentially my data looks at how often a subject was visited depending on...

    Started by choppedpete‎, 05-12-2016 05:48 AM
    glmer, lme4, lmer, repeated measures
    • Replies: 1
    • Views: 1,446
    05-12-2016, 01:48 PM Go to last post
  41. Poisson regression problem

    I was doing a Poisson regression for my data. I got a bunch of 0 or 1 (response variable) data and I used GLM in R to fit the model. Then I found...

    Started by choulcc‎, 07-08-2011 10:08 PM
    • Replies: 0
    • Views: 1,959
    07-08-2011, 10:08 PM Go to last post
  42. Multiple chi-square or logistic regression?

    Hi, I'm new to statistics and am working on a project for work. I have read extensively and believe I am on the correct path, but would like to...

    Started by Chris Webber‎, 06-22-2009 08:54 AM
    • Replies: 1
    • Views: 6,641
    06-22-2009, 07:36 PM Go to last post
  43. 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: 1,211
    02-16-2015, 03:33 PM Go to last post
  44. Question Effect Coding: p-value of reference category

    Hi, I fit a regression model with effect coded variables. I'm well aware of how to compute the value for the reference category but I have...

    Started by Chris25‎, 02-18-2013 03:39 AM
    effect coding, p-value, regression, standard deviation
    • Replies: 2
    • Views: 4,229
    02-19-2013, 03:38 AM Go to last post
  45. Logit:why aren't my exponentiated coefficients equaling my odds ratio (for nominal x)

    I'm running logit in JMP. My understanding is that if you exponentiate the coefficients, you get the change in odds ratios from a 1 unit change in X....

    Started by Chriscic‎, 11-28-2015 11:06 AM
    • Replies: 3
    • Views: 2,059
    11-28-2015, 10:18 PM Go to last post
  46. Derivation of Distribution of Sum of Matrices in Quadratic Form

    I'm having a bit of trouble starting this question. Is it right for me to assume that the sum of the Ai matrices (A1 + A2 + ... up to k) is an...

    Started by chrishello‎, 09-15-2012 02:30 AM
    • Replies: 3
    • Views: 1,628
    09-16-2012, 12:34 AM Go to last post
  47. Help with nth Leverage

    Deduce that the nth leverage lies between zero and one Heres my working out. (But part of it is from lectures.) I dont understand why the...

    Started by chrishello‎, 09-13-2012 09:55 AM
    • Replies: 1
    • Views: 1,421
    09-15-2012, 02:20 AM Go to last post
  48. 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: 3,517
    09-18-2012, 10:49 AM Go to last post
  49. Question on Finding the Least Squares Estimate (Under Certain Conditions)

    The answer to b(-i.) is easy to find (i.e. when the ith observation is omitted). It is just the answer to the least squares estimate of b for the...

    Started by chrishello‎, 10-08-2012 01:27 AM
    • Replies: 1
    • Views: 1,395
    10-12-2012, 06:08 AM Go to last post
  50. 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: 3,025
    07-19-2011, 08:27 AM Go to last post
  51. Logistic Regression

    I am having difficulty performing logistic regression in SPSS due to missing data. Any suggestions for controlling for missing data in logistic...

    Started by ChrisT‎, 09-08-2011 06:51 PM
    • Replies: 3
    • Views: 2,539
    09-11-2011, 08:14 PM Go to last post
  52. how to find mistakes in the multiple regression study

    Hello everyone, I'm working on eye-tracking papers related to reading. I'm currently studying this paper...

    Started by Christine‎, 05-14-2012 09:36 AM
    • Replies: 1
    • Views: 1,872
    05-14-2012, 09:51 AM Go to last post
  53. 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: 3,573
    05-21-2013, 02:42 PM Go to last post
  54. Lightbulb Multiple Regression to receive cost for a single item of an order

    Hi everybody, I appreciate any kind of help and tips: Problem: - I have a dataset with 1600 orders - For each of these orders I know the...

    Started by christoph_b‎, 02-03-2016 05:02 PM
    • Replies: 7
    • Views: 2,216
    02-15-2016, 04:29 AM Go to last post
  55. Interpreting a IV variable whose values have been changed

    Hello all, I'd just like to get advice on the following: I've got a few independent variables which had values ranging from -2.5 to 2.5. I...

    Started by ChrisUCT‎, 10-27-2015 12:08 PM
    • Replies: 1
    • Views: 1,046
    10-27-2015, 01:32 PM Go to last post
  56. Which regression model to use with skewed & ordinal data?

    I'm a bit stucked and just wondering about which regression technic to use with my dependent variable at hand. Respondents were asked to provide a...

    Started by Chris_J‎, 03-19-2013 10:13 AM
    • Replies: 3
    • Views: 4,240
    03-19-2013, 04:16 PM Go to last post
  57. Research Help_Regression Analysis_Log Transformation for Better Fits

    Dear All, I'm doing a research on the estimation of "Tunnel Cost" for which I carried out some regression analysis based on data of 30 tunnel...

    Started by chro‎, 09-07-2016 12:40 PM
    • Replies: 2
    • Views: 1,480
    09-07-2016, 02:26 PM Go to last post
  58. Curve fitting of individual or multiples curves

    Hi, In curve fitting, Is it acceptable to perform a curve fitting of multiples curves overlaped in the same plot or is it neccesary to fit each curve...

    Started by chuy‎, 07-13-2014 11:11 AM
    fitting a curve
    • Replies: 0
    • Views: 991
    07-13-2014, 11:11 AM Go to last post
  59. Study Design for assessing efficacy of New Clinical Sign

    Hi! I am looking for some guidance as to what statistical tests I would need to do to know the significance of a study. The situation is this: ...

    Started by cielo‎, 01-02-2016 08:51 AM
    biostatistics, case control, clinical study, diagnostic test
    • Replies: 0
    • Views: 793
    01-02-2016, 08:51 AM Go to last post
  60. standardizing residuals

    Hi All, I'd like to standardize residuals. Can anybody tell me the formula to standardize to mean 0 and standard deviation 1? I also do not...

    Started by cincan‎, 09-09-2010 04:05 PM
    • Replies: 3
    • Views: 5,553
    09-10-2010, 04:35 AM Go to last post

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