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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. continuous dep variable with several indip dicotomic variables: which statistic?

    Hello there! I have to analyze these results: my dependent variable is continuous (blood levels of a substance) I have several indipendent...

    Started by Rerun‎, 09-01-2013 03:30 PM
    • Replies: 5
    • Views: 2,454
    09-04-2013, 08:30 AM Go to last post
  2. Reporting Beta + unstandardized CIs?

    Hello, I did a multiple regression analysis and for now always only reported the standardized effect sized (Beta). Since I heard that it would be...

    Started by szidel‎, 09-04-2013 04:23 AM
    confidence interval, multiple regression, reporting results, standardized
    • Replies: 2
    • Views: 2,328
    09-04-2013, 07:15 AM Go to last post
  3. Noob question about predictive modeling

    I'm trying to understand some concepts related to predictive modeling. So let's say that I have the following data sample and am trying to regress...

    Started by amathew‎, 09-01-2013 02:56 PM
    • Replies: 2
    • Views: 1,614
    09-04-2013, 03:46 AM Go to last post
  4. Which forecasting method is most appropriate?

    Hi everyone, This question may be a bit tough but here goes! I want to forecast purchases for a two-day sale. I have historical data from a...

    Started by Oberon‎, 09-02-2013 10:51 AM
    • Replies: 1
    • Views: 1,425
    09-03-2013, 10:28 AM Go to last post
  5. help on interpreting result

    Hello, I have 2 (economic) var. the regress. on % changes shows an R2 close to 0. If I regress the (actual) values, instead of their % changes,...

    Started by didig1‎, 09-03-2013 04:13 AM
    • Replies: 0
    • Views: 1,261
    09-03-2013, 04:13 AM Go to last post
  6. Multivariate normality

    I know various methods of determing if the bivariate relationship of two variables are normal. But, as Dason has drilled into me, its multivariate...

    Started by noetsi‎, 06-21-2013 04:16 PM
    4 Pages
    1 2 3 ... 4
    multivariate normality, outliers
    • Replies: 50
    • Views: 9,979
    09-02-2013, 10:04 PM Go to last post
  7. Output of Cox regression in SPSS

    Hi! When i ran cox regression model with categorical variables having more than 2 classess what does the first sig. value mean? For ex. ...

    Started by arkiaamu‎, 09-02-2013 04:55 AM
    • Replies: 0
    • Views: 2,939
    09-02-2013, 04:55 AM Go to last post
  8. Which type of ANOVA is appropriate?

    I have two independent variables and one dependent variable. The same subjects were used (because of the limited number I had) to measure the...

    Started by poons‎, 08-30-2013 07:45 AM
    • Replies: 2
    • Views: 1,202
    09-02-2013, 04:03 AM Go to last post
  9. When to use Instrumental Variables

    Suppose I am jointly estimating two equations, and I suspect that there may be correlation between the error terms in the two equations, can I use an...

    Started by royalstatus‎, 08-31-2013 09:10 PM
    • Replies: 1
    • Views: 1,338
    09-01-2013, 09:32 AM Go to last post
  10. Help on how to analyse data

    Hi All, My name is Sergio and this is my first post to this community. I'm analysing an algorithm for my master's (bioinformatics)...

    Started by Sergio Ordine‎, 08-31-2013 08:22 AM
    • Replies: 0
    • Views: 1,194
    08-31-2013, 08:22 AM Go to last post
  11. Post Model selection for logistic regression, comparing p-value approach, BIC and CV.

    Hi, I need to write a discussion on three approaches of model selection; p-value, Bayes factors (using BIC) and leave-one-out cross validation. ...

    Started by Sophiie‎, 08-30-2013 09:19 AM
    bic, homework, logisitic regression, model selection, p-value
    • Replies: 1
    • Views: 1,242
    08-30-2013, 09:36 AM Go to last post
  12. Multiple Regression

    Hey everyone, I am a graduate student working on my thesis project and I have very minimal background in biostatistics. After talking to several...

    Started by kittytaco‎, 08-29-2013 12:13 PM
    • Replies: 2
    • Views: 1,382
    08-29-2013, 09:11 PM Go to last post
  13. Running time-series regressions on discontinuous datasets: is it legitimate?

    I would like to run a simple time-series regression, to estimate the sensitivity of my dependent variable to a set of explanatory variables. ...

    Started by mariamb‎, 08-29-2013 07:26 AM
    data, econometrics, regression, regression analysis
    • Replies: 1
    • Views: 1,342
    08-29-2013, 09:56 AM Go to last post
  14. Stepwise and Hierarchical regression - can these 2 be combined?

    Hi all, I have run both hierarchical and stepwise methods on my data with 34 IVs (categorized under 7 groups of variables), using SPSS. The...

    Started by leannel‎, 08-28-2013 08:19 AM
    hierarchical, stepwise
    • Replies: 3
    • Views: 2,608
    08-29-2013, 09:45 AM Go to last post
  15. 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: 3,729
    08-28-2013, 07:35 PM Go to last post
  16. Is it ok to have coefficients in exponents?

    Hi all, Pardon me for being so naive, but is it ok to have coefficient in exponents figure. actually I ran a regression model in stata by xtreg...

    Started by asadmushtaq‎, 08-28-2013 11:54 AM
    • Replies: 12
    • Views: 2,164
    08-28-2013, 03:54 PM Go to last post
  17. How to do Curve fit for data

    I am not able to fit curve for the data I have, and need some help. I removed metal from water and obtained the following results: days Removal...

    Started by Chandrima‎, 08-28-2013 12:55 AM
    • Replies: 5
    • Views: 1,727
    08-28-2013, 10:56 AM Go to last post
  18. Mixed effects logistic Regression

    I have what I believe is a mixed effects logistic regression. My outcome is injury (y/n) and I have subject level (age, gender, smoking) and Class...

    Started by smh5154‎, 08-27-2013 01:12 PM
    logistic regression, mixed effects, multi-level, predictors
    • Replies: 3
    • Views: 5,747
    08-28-2013, 07:06 AM Go to last post
  19. Logistic Regression with Mixed effects

    I have a logistic regression setup: Outcome = injury (y/n); predictors that are subject specific are gender, age, smoking, and predictors that are...

    Started by smh5154‎, 08-27-2013 12:28 PM
    logistic regression, mixed effects, multi level, predictors, regression
    • Replies: 0
    • Views: 969
    08-27-2013, 12:28 PM Go to last post
  20. How to use LASSO with common shocks

    I am trying to use LASSO for variable selection, on a balanced panel. I have a total of 14 predictors, and would like to reduce this variable space....

    Started by mariamb‎, 08-27-2013 09:56 AM
    econometrics, lasso, predictive model, regression
    • Replies: 4
    • Views: 1,522
    08-27-2013, 10:50 AM Go to last post
  21. Cool negative binomial regression coefficients and exp(b)

    Thank you so much anyone... I have the results of a negative binomial where the DV is the log count of meals obtained. I have continuous predictors...

    Started by LidoBeach‎, 08-23-2013 10:59 PM
    exp(b), interpreting output, negative binomial, regression, spss
    • Replies: 4
    • Views: 5,124
    08-27-2013, 09:28 AM Go to last post
  22. Partial Linear Regression

    I have an S shaped (sigmoid) curve with moderate noise and I need to estimate the slope of the straight line segment around the hypothetical...

    Started by ercolino‎, 08-06-2013 09:09 PM
    • Replies: 10
    • Views: 2,411
    08-27-2013, 06:06 AM Go to last post
  23. Regression with multiple type of independent and likert scale

    Hi guys, I just discovered this forum and would appreciate any help because I have little background in stats! My research is about interruption...

    Started by tstemdju‎, 08-21-2013 09:13 AM
    • Replies: 12
    • Views: 2,150
    08-26-2013, 10:06 PM Go to last post
  24. Basic Unbiased/Consistency Estimator Definition question

    Hi As below, i was wondering if someone could be kind enough to define these to points with reference to the diagram. I understand the...

    Started by liydg‎, 08-26-2013 01:14 PM
    • Replies: 6
    • Views: 2,151
    08-26-2013, 03:04 PM Go to last post
  25. Question Confusion over the F-ratio in a hierarchical multiple regression

    Hey all, I'm not used to work with multiple regression analysis, so I would be glad if anyone could help me interpreting this result: I...

    Started by Comfort Eagle‎, 08-26-2013 03:43 AM
    f-change, f-ratio, hierarchical regression, multiple regression
    • Replies: 1
    • Views: 7,525
    08-26-2013, 09:33 AM Go to last post
  26. Composite score as predictor in MLR

    Hello there, I want to conduct a stepwise multiple linear regression analysis with continuous independent variables, in which one of the IV's is a...

    Started by Holmes‎, 08-26-2013 08:25 AM
    • Replies: 0
    • Views: 1,888
    08-26-2013, 08:25 AM Go to last post
  27. Lag Lengths and R-squared vs Significance levels

    I am running a basic multiple variable regression with only 2 independent variables, one of which I am lagging. In particular, I'm trying to...

    Started by ScientistBlah‎, 08-25-2013 06:12 AM
    • Replies: 0
    • Views: 1,291
    08-25-2013, 06:12 AM Go to last post
  28. Histogram PDF fitting- Bin Variance Poisson or not

    So my basic query is just because you've binned and counted the data into a histogram are the error bars on the bins necessarily the Poisson sqrt(N)?...

    Started by Cinwick2321‎, 08-24-2013 06:41 PM
    histogram, poisson, variance
    • Replies: 0
    • Views: 1,319
    08-24-2013, 06:41 PM Go to last post
  29. Preprocessing Variables before Regression

    I have variables x1,x2,x3 and result y. I have a problem that multiple tuples of variables are matched with a single y. For example x1 x2 x3 ...

    Started by gungor‎, 08-24-2013 05:09 AM
    • Replies: 4
    • Views: 1,865
    08-24-2013, 12:11 PM Go to last post
  30. how to delete observations alternatively?

    working on binary logistic regression model. The dependent variable is the status of an observation. Each observation is in one of the following...

    Started by t.wang21@yahoo.com.au‎, 08-22-2013 10:18 PM
    • Replies: 2
    • Views: 1,422
    08-24-2013, 10:10 AM Go to last post
  31. comparing regression coefficients between different models to see if they are similar

    Hi all; This is a very elementary problem; but unfortunately, my strengths do not like in statistics: I am trying to describe plant growth over...

    Started by catbelize‎, 08-22-2013 03:47 AM
    coefficients, polynomial regression, standard error
    • Replies: 8
    • Views: 1,435
    08-23-2013, 09:23 AM Go to last post
  32. panel data

    does anyone know how to generate a new variable in a panel data set using stata?

    Started by royalstatus‎, 06-27-2013 02:12 PM
    • Replies: 1
    • Views: 1,400
    08-23-2013, 06:37 AM Go to last post
  33. panel regression vs cross-section

    Hi, I'm running the following regression: y=A+Bx+...+year_dummy for the years 2002-2005 and get that B is statistically significant. However, when...

    Started by ayabel‎, 07-08-2013 05:52 PM
    regresion analysis, regression coefficient
    • Replies: 1
    • Views: 1,973
    08-23-2013, 06:30 AM Go to last post
  34. Rsquared vs Adjusted Rsquared

    Hello, I have a question regarding to rsquare. I have a model with 1 independent variable which I measure with Rsquare and I have a model with 3...

    Started by Denniono‎, 08-22-2013 10:39 AM
    • Replies: 9
    • Views: 2,251
    08-23-2013, 03:58 AM Go to last post
  35. Calibration of five-hole pressure probe - Regression problem

    Hi, I have a big problem with a calibration of a five-hole pressure probe, especially with regression part. The pressure probe messures five...

    Started by Meiner‎, 08-22-2013 01:04 PM
    • Replies: 2
    • Views: 3,112
    08-23-2013, 02:13 AM Go to last post
  36. Forward stepwise regression procedure: application to panel data

    I am in the process of evaluating the importance of some factors in predicting stock returns. In this context, I would like to implement the forward...

    Started by mariamb‎, 08-22-2013 10:30 AM
    factor analysis, prediction, regression, stepwise
    • Replies: 0
    • Views: 2,278
    08-22-2013, 10:30 AM Go to last post
  37. GLS simulation: Power of certain effects

    Hi all, I have three models that use the same response variable (let's call it Y) and is testing for the effect of three predictor variables...

    Started by Lophotrochozoan‎, 08-21-2013 05:01 PM
    • Replies: 0
    • Views: 1,244
    08-21-2013, 05:01 PM Go to last post
  38. Thumbs up First difference regression - how to interpret coefficients?

    Hi there, I am planning to apply first difference regression in order to account for time (2 time points). I was wondering what will be the...

    Started by SylviaS‎, 08-21-2013 01:28 PM
    • Replies: 3
    • Views: 13,564
    08-21-2013, 03:38 PM Go to last post
  39. Post how to fit a parametric model based on generalized additive model

    hello everyone: i have fitted a generalized additive model with SAS. but i didn't find the methods to transform the loess smoothing parameters...

    Started by leoliao19861023‎, 08-21-2013 10:59 AM
    • Replies: 0
    • Views: 2,935
    08-21-2013, 10:59 AM Go to last post
  40. Time series regression books

    Hi, I am interested in Time series regression and I would like to find 1-2 good books that explain Time series with examples using SAS. Does...

    Started by szm‎, 08-14-2013 06:41 AM
    book, regression, sas, time series
    • Replies: 4
    • Views: 4,452
    08-21-2013, 09:37 AM Go to last post
  41. Crossing point

    Dear all, My question is How to find out the crossing point of two curve in a graph by using r software? Mr.S.Sivarajah

    Started by Arumairajan‎, 08-01-2013 11:46 PM
    • Replies: 2
    • Views: 3,295
    08-21-2013, 09:11 AM Go to last post
  42. backward stepwise regression: all variables eliminated

    Hello everyone, Initially I perfomed a standard logistic regression (forced enter method in spss) on my data (small sample): n= 85 and 8...

    Started by noob‎, 08-20-2013 03:57 PM
    • Replies: 2
    • Views: 5,080
    08-21-2013, 08:38 AM Go to last post
  43. Rank regression --> help!

    I am trying to do a multiple linear regression for a dependent variable Y,with different independent variables X1, X2, X3, etc. I need to use...

    Started by lingdeer‎, 08-21-2013 05:10 AM
    multiple regression, non-parametric, rank regression
    • Replies: 0
    • Views: 2,070
    08-21-2013, 05:10 AM Go to last post
  44. Question ANOVA/MANOVA for a complex data matrix

    Hi friends, I've got a data matrix with 140 rows and 5 columns. Each row represents a unique characteristic of the 5 different plant species. Idea...

    Started by vikie‎, 02-09-2012 06:34 AM
    anova, mlm
    • Replies: 4
    • Views: 2,062
    08-21-2013, 02:20 AM Go to last post
  45. One population, two sampling methods, how many logistic regression models?

    I have 400 randomly selected urban households. I have 400 rural households selected from 15 villages census style. Food insecurity (dichotomous) is...

    Started by sophiabf‎, 08-19-2013 06:15 PM
    explanatory variables, logistic regression, sample design
    • Replies: 7
    • Views: 1,532
    08-20-2013, 01:14 PM Go to last post
  46. How to test for Multi-collinearity among dummy explanatory variables

    Hello, Almost all the explanatory variables in my data are dummy variables and I would like to test for multi-collinearity among them. Does it...

    Started by kellyyang‎, 08-09-2013 04:04 PM
    dummy variables, multicollinearity
    • Replies: 6
    • Views: 2,835
    08-19-2013, 04:37 PM Go to last post
  47. relate between local and global regression analysis

    hi dears This is a linear regression analysis that I have m1 , b1 , β1 mi , bi , βi (βi is standard deviation) How I can calculate m b ...

    Started by hrcivil‎, 08-19-2013 02:20 AM
    • Replies: 0
    • Views: 1,368
    08-19-2013, 02:20 AM Go to last post
  48. help on SAS Output

    Hi everyone, new to the community and looking for some help. I'm currently in the process of writing my thesis and having some difficulties with...

    Started by Dilschad‎, 08-16-2013 05:05 PM
    • Replies: 5
    • Views: 1,976
    08-17-2013, 08:33 AM Go to last post
  49. Pre-processing inputs for a Logistic Regression

    Hi everyone, I recently learned about logistic regressions on my own and wanted to create a credit card default model. My question (perhaps...

    Started by Oberon‎, 08-14-2013 06:08 AM
    • Replies: 1
    • Views: 2,097
    08-17-2013, 05:06 AM Go to last post
  50. Using regression slopes as dependent variable

    Hi, I am in the process of designing a model and wish to ask if my model is appropriate. Currently, I have a panel data with 30 years'...

    Started by littlehippo‎, 08-15-2013 01:47 PM
    • Replies: 0
    • Views: 1,199
    08-15-2013, 01:47 PM Go to last post
  51. no r-squared calculation for models without the constant

    hi, I ran a multiple regression in Minitab and tried the model without the constant. It worked well but Minitab did not give me the r-squared value....

    Started by rogojel‎, 08-13-2013 12:52 AM
    • Replies: 6
    • Views: 2,706
    08-15-2013, 04:57 AM Go to last post
  52. regression models on different samples (consulting question)?

    hey peeps. today i was asked to consult on the analysis of some data and just wanted to hear your thoughts on whether what i said was reasonable or...

    Started by spunky‎, 08-14-2013 10:10 PM
    • Replies: 1
    • Views: 1,373
    08-14-2013, 10:21 PM Go to last post
  53. Likert Scale Regression Analysis

    I want to perform a regression on some likert scale data. Basically its a scale which measures propensity for participative management. The rationale...

    Started by andrewol‎, 08-12-2013 03:01 PM
    • Replies: 7
    • Views: 14,157
    08-13-2013, 04:09 PM Go to last post
  54. Doing a stepwise mutiple regression

    Hi everyone, I've got two continuous DVs (N = 48, so not a huge sample) and three inter-correlated, continuous IVs. I'm interested in finding out...

    Started by lindles‎, 08-13-2013 07:01 AM
    • Replies: 8
    • Views: 2,285
    08-13-2013, 11:05 AM Go to last post
  55. Multiple Regression in Matlab

    Good afternoon, I have a little problem in matlab using the regstats function. I have four matrices with information. Let's name them A, B, C and...

    Started by Denniono‎, 08-13-2013 10:50 AM
    • Replies: 0
    • Views: 3,442
    08-13-2013, 10:50 AM Go to last post
  56. Can I use regression with this type and amount of data?

    Greetings all. First time poster here and I hope I can find some help. I have looked around this site and on Google for an answer to my questions but...

    Started by northtexas55693‎, 08-13-2013 12:34 AM
    • Replies: 1
    • Views: 1,418
    08-13-2013, 10:07 AM Go to last post
  57. Ranking/sorting of variables after 'ordinance regression'

    I have run regression and came up with 5 out of the 9 varibles are having an impacat on the final output (0,1,2). I want to see the order in which...

    Started by sangi‎, 08-13-2013 06:38 AM
    minitab, ordinance regression
    • Replies: 2
    • Views: 1,215
    08-13-2013, 06:54 AM Go to last post
  58. Likert scale regression

    I have done a likert type survey ( with 5 point scale) and I am facing problems in analysing the data. following is the situation: Both DV and IV...

    Started by yodadcoda‎, 08-12-2013 03:35 PM
    • Replies: 10
    • Views: 2,314
    08-13-2013, 02:53 AM Go to last post
  59. [SPSS] Multivariable logistic regression - how to transform to achieve linearity?

    Hi, I am doing a project to identify variables that can predict rehospitalisations. There are a few categorical and continuous variables that I...

    Started by Odd90‎, 07-20-2013 05:28 PM
    2 Pages
    1 2
    • Replies: 15
    • Views: 14,585
    08-12-2013, 07:05 PM Go to last post
  60. Explaining cross-sectional variation of betas (PANEL DATA)

    Hi, I am a economics master student and have an upcoming research project. Whilst designing a model for my research, I realized that my...

    Started by littlehippo‎, 08-12-2013 10:51 AM
    • Replies: 0
    • Views: 1,469
    08-12-2013, 10:51 AM Go to last post

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