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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Regression analysis of more than two independent and dependent variables

    Hello, I want to find the relationship between independent and dependent variables using regression analysis. There are 5 IV and 4 DV. Please...

    Started by ashima‎, 04-11-2012 07:20 AM
    • Replies: 8
    • Views: 5,653
    05-14-2012, 09:50 AM Go to last post
  2. GLMM random effect conceptualization

    Hello, I have a general question concerning GLMM. I would like to model animal counts as a function of characteristics of the sampling location and...

    Started by filups21‎, 05-14-2012 08:13 AM
    • Replies: 0
    • Views: 1,741
    05-14-2012, 08:13 AM Go to last post
  3. Regression with two categorical predictors and 1 control/covariate?

    Hello, I'm in need of help as these analyses I describe are for my thesis so any input would be greatly appreciated. By the way, I am using IBM...

    Started by acer539‎, 05-13-2012 02:57 PM
    • Replies: 1
    • Views: 2,487
    05-14-2012, 03:04 AM Go to last post
  4. Calculating Cook's Critical Value

    Hey can someone show me how to get F (4,15) (0.5) = 0.8783.

    Started by saternal‎, 05-12-2012 12:43 AM
    • Replies: 7
    • Views: 5,555
    05-12-2012, 01:37 PM Go to last post
  5. find variance of prediction errors for an AR(2) process

    Hi I have attached my question due to my lack of familiarity with latex at the moment. I need to find the variance of the prediction errors,...

    Started by cjones‎, 05-11-2012 05:58 PM
    • Replies: 0
    • Views: 4,895
    05-11-2012, 05:58 PM Go to last post
  6. Insignificant coefficient in one model becomes significant in another model--???

    Aloha, A multiple regression finding is puzzling my adviser and I. Overall goal--to see if caregiver status (dummy, 0/1) and job variables...

    Started by ljcs‎, 04-27-2012 06:26 PM
    • Replies: 3
    • Views: 10,383
    05-10-2012, 07:21 PM Go to last post
  7. Linear R^2 Values as Percent Weights for Multiple Variable Formula?

    Hey guys, Statistics is not my strong suit.. The closest I've been to statistics is a college level Biology II class I took three years ago.. But...

    Started by 7rashcan‎, 05-07-2012 05:20 PM
    multiple regression, percent, r squared, r^2, weights
    • Replies: 1
    • Views: 2,840
    05-10-2012, 06:12 PM Go to last post
  8. Beginner's Question

    Given that you have all the data you need in excel, how fast does it take to derive the equation of the line with it's r2 value? lets say you use...

    Started by webstood‎, 05-10-2012 06:07 PM
    • Replies: 0
    • Views: 1,426
    05-10-2012, 06:07 PM Go to last post
  9. 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: 3,798
    05-10-2012, 06:06 PM Go to last post
  10. What tools can we use to solve LR equations to get unknown parameter vector?

    Greetings, Apologies if my explanations are unclear, I am new to data mining coming from business intelligence development area. Let's say we...

    Started by olap‎, 05-10-2012 08:51 AM
    data mining, linear regression, parameter vector
    • Replies: 4
    • Views: 1,955
    05-10-2012, 01:16 PM Go to last post
  11. Squared semi partial correlations

    Hi I have been developing multiple regression models with 2 predictors. The two predictors are slightly correlated and therefore I am wanting to...

    Started by Lisa20‎, 03-31-2012 02:15 AM
    • Replies: 2
    • Views: 2,791
    05-08-2012, 06:53 AM Go to last post
  12. Regression Analysis on cluster of data

    I'm currently a student trying to analyze the relation between the cost of marketing and it's observed returns on those costs. obviously, the...

    Started by webstood‎, 05-06-2012 12:15 PM
    • Replies: 3
    • Views: 2,305
    05-06-2012, 04:09 PM Go to last post
  13. cut-off point for binary logistic regression without ROC curve

    Hi! I just want to know how to find a relatively good cut-off point for binary logistic regression model. I haven't learnt anything on ROC curve. Is...

    Started by xiaochen‎, 05-06-2012 11:29 AM
    cut-point, logistic regression
    • Replies: 0
    • Views: 6,147
    05-06-2012, 11:29 AM Go to last post
  14. which model to use ?

    Hello I have a problem choosing the right model for my data. My response variable is time to event in minutes, when a lower value is better...

    Started by Yankel‎, 05-03-2012 05:55 AM
    • Replies: 3
    • Views: 2,405
    05-04-2012, 02:02 PM Go to last post
  15. Alternatives to Poisson regression for overdispersed count data

    Hi all, I'm currently analyzing data from a series of behavioral experiments that all use the following measure. The participants in this...

    Started by forscher‎, 05-04-2012 11:20 AM
    count data, poisson mean/variance, poisson regression
    • Replies: 6
    • Views: 2,514
    05-04-2012, 11:52 AM Go to last post
  16. relative risk ratios and standard errors

    Hey forum, Odds ratios or relative risk ratios are calculated by exponentiating the coefficients (from a binary or multinomial logit model),...

    Started by cureeous‎, 05-04-2012 12:16 AM
    • Replies: 2
    • Views: 2,964
    05-04-2012, 08:17 AM Go to last post
  17. Timeseries: sig. Ljung-box Q, but residuals normally distributed

    Hi all, Hope someone can help me with the following problem/question I encounter. I'm working with a monthly time-serie consisting of 36 data...

    Started by Eyecatcher‎, 05-03-2012 11:02 AM
    exponential smoothing, ljung-box q, timeseries
    • Replies: 4
    • Views: 7,921
    05-03-2012, 12:15 PM Go to last post
  18. Logistic Regression

    I have a sample of 500 older kids and we want to investigate what factors are related to the probability that they will bully. Groups: kids were...

    Started by glenlivet12‎, 05-02-2012 08:48 AM
    • Replies: 3
    • Views: 2,414
    05-02-2012, 09:09 AM Go to last post
  19. Observation limitation

    I am currently doing my dissertation on how China's economic growth contributes to Hong Kong's income inequality after 1997. However, there are only...

    Started by jkw10‎, 05-02-2012 08:31 AM
    • Replies: 0
    • Views: 1,843
    05-02-2012, 08:31 AM Go to last post
  20. multiple regression and mediators

    Hi I have 10 independent variables and 1 dependent variable. Of the 10 i have selected 4 variables as my predictors for my multiple regression. I...

    Started by eleanor_rigby‎, 05-01-2012 06:52 AM
    • Replies: 4
    • Views: 4,114
    05-02-2012, 05:57 AM Go to last post
  21. Predictors in Logistic regression, SPSS

    Hello. I have the problem I cant deal with. Maybe you can help me? You see, I have 2 samples in retrospective cohort study cases (include 29...

    Started by julbeam‎, 05-01-2012 03:53 AM
    logistic regression, predictor, spss
    • Replies: 3
    • Views: 3,712
    05-01-2012, 02:08 PM Go to last post
  22. Difference in Differences (DID) - control group question

    Hi, I am considering doing the following and I am wondering whether it makes statistical sense. I am interested in comparing the time spent...

    Started by Laco‎, 05-01-2012 12:35 PM
    • Replies: 0
    • Views: 1,184
    05-01-2012, 12:35 PM Go to last post
  23. Thumbs up Simple Question (Multiple Regression)

    Hi Guys and Gals! I am performing linear regression with interaction terms. I also wish to test these variables separately, so predictor1...

    Started by richieboy‎, 05-01-2012 05:51 AM
    • Replies: 1
    • Views: 1,926
    05-01-2012, 09:05 AM Go to last post
  24. Identifying significant covariates

    Hello, I've been asked to identify covariates based on significant associations b/w covariates and the IV as well as the DV. I've never done this...

    Started by Oscar2002‎, 05-01-2012 08:45 AM
    • Replies: 0
    • Views: 2,872
    05-01-2012, 08:45 AM Go to last post
  25. Logistic regression analysis - Large beta coefficients

    Hi, I have just run a logistic regression analysis on 7 IVs and a dichotomous DV. The IVs are regression-weighted composite scores of Likert scale...

    Started by adrmck17‎, 04-30-2012 09:54 AM
    • Replies: 3
    • Views: 4,906
    05-01-2012, 02:46 AM Go to last post
  26. Regression Coefficients & Chi Squared test

    I am finding it difficult to understand something I found in a textbook. The author runs a regression of the specification Y = a + bX, on the basis...

    Started by zahg‎, 05-01-2012 01:21 AM
    • Replies: 0
    • Views: 1,651
    05-01-2012, 01:21 AM Go to last post
  27. Incremental poisson/logistic regression

    Is anyone aware of any work on incremental poisson or logistic regression, i.e. where training data arrives one sample at a time, the samples are not...

    Started by targi‎, 04-30-2012 03:14 PM
    • Replies: 0
    • Views: 1,404
    04-30-2012, 03:14 PM Go to last post
  28. Creating an indicator variable of a single observation

    Hello, Could somebody explain the rational for creating a dummy variable for a single observation in a regression analysis. Why would you do it? ...

    Started by bradyj2‎, 04-29-2012 06:26 AM
    • Replies: 0
    • Views: 2,062
    04-29-2012, 06:26 AM Go to last post
  29. Binary logistic regression to analyze Likert Scale questionnaire

    Hi, I am sort of stuck with the following problem concerning logistic regression analysis in my research on the determinants of technology...

    Started by adrmck17‎, 04-28-2012 12:24 PM
    • Replies: 0
    • Views: 4,186
    04-28-2012, 12:24 PM Go to last post
  30. Blinder-Oaxaca Decomposition for a Multivariate Linear Regression

    Hello Everyone, I am working on a thesis that uses a multivariate linear regression to evaluate the racial wealth gap between four groups: whites,...

    Started by Colin‎, 03-16-2012 05:21 PM
    blinder-oaxaca, decomposition, general linear regression, multivariate regression, oaxaca
    • Replies: 1
    • Views: 5,658
    04-28-2012, 11:36 AM Go to last post
  31. F-Test Interpretation and Log-Linear?

    Hey. I have found this a very difficult subject to self-teach and unfortunately I have not found my teachers particularly helpful. Sorry about the...

    Started by Jak‎, 04-16-2012 02:10 PM
    • Replies: 9
    • Views: 4,494
    04-27-2012, 01:40 PM Go to last post
  32. Dummy variable question in regression

    Hello, I'm trying to understand dummy variables in regression. I'm regressing the price of diamonds against (1) weight (2) Clarity and (3)...

    Started by bradyj2‎, 04-24-2012 01:35 PM
    • Replies: 2
    • Views: 2,166
    04-26-2012, 11:26 AM Go to last post
  33. OLS regression versus Binary regression

    Hello, I am currently working on my master thesis and I have a question regarding the use of two types of regressions. First, I will explain the...

    Started by Julien‎, 04-25-2012 11:51 AM
    • Replies: 1
    • Views: 2,127
    04-26-2012, 05:29 AM Go to last post
  34. Imputation Missing Value with Regression

    Hai, i'm new in here. I'm doing my final project now. Actually i'm not in statistics department or something about statistics. I'm in informatics...

    Started by istia‎, 04-24-2012 07:14 AM
    • Replies: 7
    • Views: 2,081
    04-26-2012, 01:35 AM Go to last post
  35. Exclamation Interpretation of coefficient differences across sample groups (please help!?)

    Hello! Before I start the whole story, I am going to sumamrize my main question beforehand so the story will hopefully make more sense. Mainly,...

    Started by Dana‎, 04-25-2012 02:01 PM
    coefficient, interpretation, multiple regression, research, wald
    • Replies: 0
    • Views: 2,121
    04-25-2012, 02:01 PM Go to last post
  36. Weight Matrix in Generalised Linear Models

    Hi, I was wondering if I am trying to do IRLS for GLZ. Is there a way to compute the weight matrix directly for the data I have? I think its...

    Started by mank_bansal‎, 04-25-2012 09:31 AM
    generalised linear models, irls
    • Replies: 0
    • Views: 1,128
    04-25-2012, 09:31 AM Go to last post
  37. multiple linear regression

    hey guys, i want to ask if anyone has came across any statistical test that have attemted to rank independent variables in their other of...

    Started by segunstarr‎, 04-24-2012 10:08 AM
    • Replies: 0
    • Views: 1,512
    04-24-2012, 10:08 AM Go to last post
  38. Really stuck with moderated regression...

    I have used a hierarchical regression analysis in SPSS, however the analysis isn't producing any significant interactions :confused: The...

    Started by Psychx‎, 04-24-2012 08:08 AM
    • Replies: 4
    • Views: 2,650
    04-24-2012, 09:29 AM Go to last post
  39. T-test for 2 slopes

    Is there a t-test that I can use to show that my two slopes are on different planes, or that they are different? ...

    Started by SeatOFpants‎, 04-23-2012 03:25 PM
    • Replies: 0
    • Views: 3,134
    04-23-2012, 03:25 PM Go to last post
  40. Angry Appropriate null hypothesis for a two-stage regression

    Hi thanks everyone for your help in advance. Im working on a two-stage regression, in which a coefficient from the first regression is used as an...

    Started by Daoist‎, 04-23-2012 08:25 AM
    hypothesis testing, multistage, null hypothesis, two stage
    • Replies: 0
    • Views: 1,494
    04-23-2012, 08:25 AM Go to last post
  41. Homogeneity of regression slopes

    If assumption of homogeneity of regression slopes broken in ANCOVA analysis, what to do? Can I use linear regression instead? Thanks

    Started by saraf‎, 04-23-2011 07:00 AM
    ancova, homogeneity of slopes
    • Replies: 3
    • Views: 6,125
    04-23-2012, 04:55 AM Go to last post
  42. Simple minitab result interpretation ?

    I've lost most of my lecture notes and am having trouble recalling the formulae for various results, it would be appreciated if you could please help...

    Started by sid9221‎, 04-21-2012 03:43 PM
    • Replies: 0
    • Views: 1,897
    04-21-2012, 03:43 PM Go to last post
  43. Systematic way of finding all linear relations between given set of variables?

    Hello! I'm a newcomer to statistics and data analysis and I'm currently facing a problem which I don't know how to solve. I have a dataset with...

    Started by Lamazivardi‎, 04-21-2012 04:04 AM
    • Replies: 0
    • Views: 1,592
    04-21-2012, 04:04 AM Go to last post
  44. Help with "nominal" variables and dummy coding

    Hi. First of all, I'm sorry for not writing 100% correct as this is not my everyday language :) My quetion I'm working with linear...

    Started by aleksaah‎, 04-20-2012 10:57 AM
    • Replies: 3
    • Views: 3,139
    04-21-2012, 03:07 AM Go to last post
  45. Help me choose a regression model?

    Hi everyone, I have the following problem in mind: Suppose m items are displayed to a user and the user can buy any one of them. Each of the items...

    Started by Comrade‎, 04-20-2012 07:40 PM
    • Replies: 2
    • Views: 1,852
    04-20-2012, 08:17 PM Go to last post
  46. 2-Way ANOVA: Interaction plots show interaction, but term is insignificant?

    Hi, I am doing some 2-way ANOVA analysis and have a slight issue. The interaction plots seem to show there is interaction between the two groups,...

    Started by regression_is_cool‎, 04-20-2012 01:41 PM
    • Replies: 1
    • Views: 2,149
    04-20-2012, 02:08 PM Go to last post
  47. Seemingly Unrelated Regression vs Maximum Likelihood ~ best for constraints?

    I am currently doing research and I am utilizing an almost ideal demand system. It is essentially a regression equation that seeks to model consumer...

    Started by dannylimstata‎, 04-20-2012 03:10 AM
    • Replies: 0
    • Views: 1,776
    04-20-2012, 03:10 AM Go to last post
  48. Exclamation Help! my model isn't predicting any yes outcomes and don't know why

    I am producing a logistical regression analysis to find a model to predict whether someone has minor mental health problems or not. I'm almost...

    Started by el89‎, 04-19-2012 08:58 PM
    help me!, logisitic regression, prediction errors, predictive model, regression analysis
    • Replies: 9
    • Views: 2,134
    04-20-2012, 02:57 AM Go to last post
  49. Combining regression with time series

    Using an existing time series of supermarket sales data I need to make a forecast. Basically a simple exponential smoothing model explains future...

    Started by kenasto‎, 01-20-2011 09:49 PM
    • Replies: 2
    • Views: 5,893
    04-19-2012, 05:59 AM Go to last post
  50. Multiple Regression theory

    Hey guys I'm not too good with the logic of multiple regression so I'd like some enlightenment on the following query. I'm running a multiple...

    Started by durantz‎, 04-03-2012 12:11 AM
    • Replies: 6
    • Views: 2,850
    04-19-2012, 05:19 AM Go to last post
  51. Testing a learning curve

    Hi all, Suppose someone kicks a football at a goal. However, I want to test to see whether or not practice improves technique - whether there is a...

    Started by Leon_1648‎, 04-18-2012 04:25 AM
    learning curve, significance, test
    • Replies: 0
    • Views: 1,780
    04-18-2012, 04:25 AM Go to last post
  52. Log Transform and Nonpositive Values

    I know that some researchers, when taking the log of a variable with some nonpositive values (like wealth), simply replace the nonpositive values...

    Started by tomyris‎, 04-17-2012 01:40 PM
    • Replies: 0
    • Views: 1,618
    04-17-2012, 01:40 PM Go to last post
  53. How to test significance of the mean of multiple OLS regressions (Jensen's Alpha).

    Hi. Im working on a paper on mutual fund performance, using Jensen's Alpha to measure performance. Ri-Rf=a+b(Rm-rf)+ei Time series regression,...

    Started by Vogelius‎, 03-26-2012 08:56 AM
    • Replies: 1
    • Views: 4,396
    04-17-2012, 06:23 AM Go to last post
  54. Regressing survey data with independent variables and external data as dependent

    I have an SPSS file with longitudinal data, stretching back 18 months or so (monthly survey with around n=1000), so the survey month is one of the...

    Started by Thomster‎, 04-16-2012 09:18 PM
    • Replies: 0
    • Views: 1,925
    04-16-2012, 09:18 PM Go to last post
  55. Panel Data Regression with Few Observations

    Hello! I know very little of statistics but I need help to do my thesis. I'm running a regression with fixed and random effects in a panel data of 5...

    Started by Argen‎, 04-16-2012 05:57 PM
    panel data, stata
    • Replies: 0
    • Views: 2,990
    04-16-2012, 05:57 PM Go to last post
  56. Panel data regression time fixed & firm fixed

    Hi all, After desparately searching the web and the library I hope one of you will be able to help me with my spss (no 19) problem. My data set...

    Started by BaselII‎, 04-15-2012 02:29 AM
    • Replies: 0
    • Views: 2,060
    04-15-2012, 02:29 AM Go to last post
  57. When Logistic Regression Coefficient Increases

    Hi All, I am trying to understand the relationship between naturalization (whether someone becomes a naturalized citizen or not), using data from...

    Started by Nao‎, 04-12-2012 02:04 PM
    • Replies: 1
    • Views: 2,381
    04-12-2012, 02:17 PM Go to last post
  58. Logistic regression significant interaction with categorical predictor

    Hello everyone, I am doing a binary logistic regression and a have some questions about presenting my data. Depedent variable: Extensive rot...

    Started by lken‎, 04-11-2012 05:10 PM
    • Replies: 0
    • Views: 1,711
    04-11-2012, 05:10 PM Go to last post
  59. disputing a fixed effects model assumption

    Hi guys, I'm in the middle of responding to a reviewer's claim on fixed effects models and wanted to reach out to see if any of you had any...

    Started by Link‎, 04-11-2012 12:29 PM
    • Replies: 0
    • Views: 1,555
    04-11-2012, 12:29 PM Go to last post
  60. multiple timeseries in regression ?

    Hi, has anyone ever done multiple time series in a regression model.. So for example if I have 3 different regions (Prov) each with 10 sub-regions...

    Started by podarum‎, 04-11-2012 09:30 AM
    • Replies: 0
    • Views: 2,655
    04-11-2012, 09:30 AM Go to last post

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