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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. f-test, regression to polynomial

    Hi, I am in over my head and could use some guidance. For an assignment, I have divided the data into two classes (arbitrary) and used only one to...

    Started by JillthePill‎, 10-13-2012 06:27 PM
    • Replies: 0
    • Views: 1,549
    10-13-2012, 06:27 PM Go to last post
  2. P-Values equal to zero

    Hi, I am running simple OLS regressions on forward and spot price data and have been getting p-values equal to exactly 0 (i.e. not 0.0000000234) for...

    Started by harleystats‎, 04-30-2015 09:56 PM
    p value, p values
    • Replies: 1
    • Views: 1,549
    04-30-2015, 10:05 PM Go to last post
  3. Linear Regression with effect size changes of categorical variables with continuous

    I have three categorical variables (disked, herbicide, Lands) each is binomial (0,1). For example, within disked there is a group in which it does...

    Started by farre1pd‎, 07-27-2015 12:45 PM
    ancova, categorical, continuous, group differences
    • Replies: 3
    • Views: 1,549
    07-27-2015, 02:21 PM Go to last post
  4. Confidence bands for a linear regression with X and Y errors

    Dear all, I have been searching for a while without finding a solution, so I hope someone here can help. Here is my problem: I have (X, Y)...

    Started by quentin.flm‎, 02-05-2016 09:23 AM
    • Replies: 5
    • Views: 1,549
    02-08-2016, 05:29 AM Go to last post
  5. Weather Prediction

    I am looking at past temperature, solar angle, and wind vectors to develop a prediction of the temperature in the next hour. What would be the...

    Started by Aquabug222‎, 06-01-2011 01:29 PM
    • Replies: 0
    • Views: 1,548
    06-01-2011, 01:29 PM Go to last post
  6. Interaction between time and time-varying between-subjects variable

    I'm struggling with how to think about a question that seems like it should be really straightforward. I have some survey data about regrets...

    Started by CowboyBear‎, 07-31-2014 05:52 PM
    • Replies: 6
    • Views: 1,548
    08-01-2014, 05:35 PM Go to last post
  7. How do you find the average correlation of a variable that changes over time?

    I'm looking at a data set of movies with the number of mentions on Twitter over time and trying to find if there's a linear correlation with box...

    Started by sosaysi‎, 01-26-2015 05:50 PM
    • Replies: 2
    • Views: 1,548
    01-27-2015, 11:13 AM Go to last post
  8. Panel Data Model. Problem !

    Hi everyone, First, Ihave to mention that I am newbie in statistic so I may have some evident questions ! Actually, I am working on a...

    Started by Ihssanee‎, 03-23-2015 10:29 AM
    • Replies: 2
    • Views: 1,548
    03-23-2015, 11:51 AM Go to last post
  9. Non-parametric causality test

    how can i rank-transform 3 variables in eviews or stata to perform non-parametric causality test? please help

    Started by ppowerful‎, 04-22-2013 03:15 PM
    • Replies: 0
    • Views: 1,547
    04-22-2013, 03:15 PM Go to last post
  10. Matching

    Dear experts, For a fMRI (functional brain scan) experiment, I am comparing scans from 40 subjects with a condition that may or may not affect the...

    Started by andhou‎, 01-27-2014 06:54 AM
    • Replies: 0
    • Views: 1,547
    01-27-2014, 06:54 AM Go to last post
  11. Trouble with GLMs (Using R)!

    Greetings! I've been trying to analyse some data for a while now, and I have found what I think the best model for my GLM is. However, I have friends...

    Started by Haggis‎, 12-30-2012 04:08 PM
    • Replies: 4
    • Views: 1,546
    01-02-2013, 04:52 PM Go to last post
  12. Non linear regression and under-/overvaluation calc.

    As you know the Security Market Line is used to find under- or overvalued securities (if they plot below or above the SML). I am doing something...

    Started by Capslock‎, 07-04-2010 11:31 PM
    • Replies: 0
    • Views: 1,545
    07-04-2010, 11:31 PM Go to last post
  13. Non-linear modelling with several variables including a categorical variable

    Hello everyone, I am trying to model some data regarding a predator prey interaction experiment (n=26) in R. Predation rate is my response...

    Started by Robmais‎, 07-03-2013 03:11 AM
    gam, nonlinear regression
    • Replies: 0
    • Views: 1,545
    07-03-2013, 03:11 AM Go to last post
  14. Bias in Regression Parameter Estimates

    Hi, I am new to Statistics. Currently, I am working on a project that involves missing data analysis. I want to know how to quantify bias for...

    Started by krishmar1‎, 11-17-2013 11:28 AM
    • Replies: 0
    • Views: 1,545
    11-17-2013, 11:28 AM Go to last post
  15. Interaction terms

    Dear all, I would like to hear your thoughts/ideas/comments on this. Brambor et al. (2006) write the following on interaction terms: "The...

    Started by lbv‎, 03-13-2014 08:24 AM
    • Replies: 0
    • Views: 1,545
    03-13-2014, 08:24 AM Go to last post
  16. Help with interactions in regression

    Hi I would really appreciate if anyone could please help me with this. I am doing a regression analysis, looking at the effect of 2 drugs (A or B)...

    Started by Bio_Stat‎, 03-03-2015 07:42 PM
    • Replies: 3
    • Views: 1,545
    03-04-2015, 08:19 AM Go to last post
  17. Instrumental variable apporach: two stage least squares

    Hello everyone, I want to test cross sectional data with a household survey with 60k plus of respondents (however missing data result in overall...

    Started by Carlos_1‎, 01-11-2016 03:38 PM
    • Replies: 1
    • Views: 1,545
    01-11-2016, 08:05 PM Go to last post
  18. Regression on two explicative variables

    Hello, I am currently doing a thesis which aims to explain returns of stocks in function of the ownerships of some stakeholders. In the Excel...

    Started by Gaut93‎, 08-01-2016 05:24 AM
    • Replies: 2
    • Views: 1,545
    08-02-2016, 02:42 AM Go to last post
  19. 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: 1,544
    04-21-2012, 04:04 AM Go to last post
  20. normality transformation and regression

    Hi, I have performed 1/sqrtY, and sqrtY transformations on different data sets to achieve normal distribution for simple linear regressions. So...

    Started by Deccantraps‎, 07-03-2014 03:52 AM
    normality transformation, regression
    • Replies: 6
    • Views: 1,543
    07-04-2014, 03:11 AM Go to last post
  21. Newbie in trouble (is regression the right way to go here?)

    Hi there! (background, skip if wanted) New member here. Finance student with an exciting area to write a paper about but I have not taken any...

    Started by FinanceBug‎, 04-21-2016 04:36 AM
    • Replies: 0
    • Views: 1,543
    04-21-2016, 04:36 AM Go to last post
  22. Repeated measures regression

    Hi, I have data from an experiment with a continuous dependt variable and two dicotomous independent variable. All measures are repeated within...

    Started by espenmei‎, 02-20-2013 03:43 PM
    regression analysis, repeated measures
    • Replies: 0
    • Views: 1,542
    02-20-2013, 03:43 PM Go to last post
  23. Regression for consumer purchase behavior

    Hello, I'm pursuing a project as part of my MBA and while I have some basic stats background I am very new to in-depth regression analysis. I'm...

    Started by macwiz‎, 02-01-2014 08:58 PM
    • Replies: 1
    • Views: 1,541
    02-02-2014, 02:55 PM Go to last post
  24. External dataset validation of a binary logit model

    Hello all, i have developed a prognostic model using binomial logistic regression. Now i want to validate it in an external dataset. The standard...

    Started by Sheetal‎, 12-27-2014 08:30 AM
    logit validation
    • Replies: 1
    • Views: 1,540
    12-27-2014, 08:43 AM Go to last post
  25. 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: 1,539
    04-17-2012, 01:40 PM Go to last post
  26. Regression analysis with nominal dependent variable

    Hello! In short: I'm having issues with figuring out a technique to measure how well does a categorical variable explain variation among a nominal...

    Started by Jüri‎, 12-03-2014 08:30 AM
    analysis, dependent, nominal, regression, variable
    • Replies: 3
    • Views: 1,539
    12-05-2014, 08:38 AM Go to last post
  27. My nemesis: multinomial logistic regression

    Dear all, For the final article of my PhD-thesis, I need to analyze various categorical results. My goal is to find whether a certain genotype...

    Started by ecverbeek‎, 09-30-2013 04:23 AM
    categorical data analysis, genetic, multinomial regression
    • Replies: 1
    • Views: 1,538
    09-30-2013, 08:30 AM Go to last post
  28. Regression - I'm Stuck! Feedback PLEASE...Thanks!

    figured it out now.

    Started by skittles‎, 05-02-2014 12:11 AM
    regression, regression analysis, regression coefficent
    • Replies: 0
    • Views: 1,537
    05-02-2014, 12:11 AM Go to last post
  29. multiple regression if one corrleation variable is linear, other is nonlinear

    Hello, I am working on soil biology. I have a data set of soil CO2 emissions (dependant variable), with a number of other measured variables...

    Started by goolian‎, 08-07-2014 07:57 PM
    • Replies: 2
    • Views: 1,536
    08-09-2014, 08:41 AM Go to last post
  30. Include trend in a Poisson regression

    Hey, I'm doing a research about the impact of a co-payment rise policy in the ER. My outcome variable is the number of visits in a week and my...

    Started by PedroR‎, 04-23-2013 06:31 AM
    • Replies: 0
    • Views: 1,535
    04-23-2013, 06:31 AM Go to last post
  31. F test and t-test

    Hi guys, I am analyzing some regression results and the p-value for the F-test is large, but at the same time, the t-test for some of the independent...

    Started by boredaxel‎, 10-14-2012 12:20 AM
    • Replies: 2
    • Views: 1,534
    10-15-2012, 09:03 AM Go to last post
  32. Regression Using Interaction Terms - PANEL DATA

    Good afternoon, I am working with a panel data with more than 2000 observations and only two years. My topic is on "Full Risk Insurance" in...

    Started by Guy Salgado‎, 08-29-2014 01:02 PM
    index variable, interaction terms, interaction variables, panel fixed effects, regression coefficients
    • Replies: 0
    • Views: 1,534
    08-29-2014, 01:02 PM Go to last post
  33. Can I combine PCA terms with real variables?

    Hello, I'm new to this forum. Hopefully I am doing this right! I am trying to do a multiple regression analysis on a data set that has about 250...

    Started by Adrian_‎, 03-24-2014 04:47 PM
    • Replies: 0
    • Views: 1,533
    03-24-2014, 04:47 PM Go to last post
  34. Bycatch of dolphins data, zero inflated and under-dispersed - what next?

    I am investigating the factors that influence the bycatch of dolphins using a poisson GLM. My response variable is bycatch rate per unit effort and...

    Started by platanista‎, 05-21-2014 12:34 PM
    glm, poisson distribution, poisson regression
    • Replies: 2
    • Views: 1,533
    05-22-2014, 09:46 AM Go to last post
  35. OR improving inmultyvariate logistic regression

    Hi! Does it make sense that odds ratio are getting better (higher) and more significant when moving from a univriate to a multivariate regression...

    Started by Doobdoob‎, 10-19-2015 01:43 PM
    • Replies: 10
    • Views: 1,533
    10-22-2015, 04:03 PM Go to last post
  36. Polynomial Regression

    Is there anyway to get this formula in the polar opposite where X = Expression? I am hoping to get this so that I can use it to help do a...

    Started by mrmmickle1‎, 08-06-2015 10:42 PM
    • Replies: 0
    • Views: 1,532
    08-06-2015, 10:42 PM Go to last post
  37. Relationship between 2 variables & 1 dependant

    Hi all, My wife is busy with an assignment that is even giving me grey hair. She needs to determine the relationships between 2 variables and 1...

    Started by kiepie‎, 07-28-2015 12:40 PM
    • Replies: 7
    • Views: 1,531
    07-30-2015, 07:45 AM Go to last post
  38. using a binary response for a mixed model

    Hello, My journey through mixed models (which is documented in past questions) has been an arduous one, however I appreciate being introduced to...

    Started by Dragonwalker‎, 03-25-2012 01:01 PM
    mixed-models binary lme4
    • Replies: 0
    • Views: 1,530
    03-25-2012, 01:01 PM Go to last post
  39. Talking Ordinal logistic regression or linear regression?

    Hi Guys, just wondering if I could have your help pls. I have a sample size of 55 patients (of which 22 were subsequently diagnosed with Heart...

    Started by skaur‎, 02-25-2016 05:14 AM
    • Replies: 0
    • Views: 1,530
    02-25-2016, 05:14 AM Go to last post
  40. Multiple regression analysis - Linearity/homoscedasticity

    Hello, I am currently having trouble determining if my predictors show enough linearity to be used in a standard multiple regression analysis, and...

    Started by pussel81‎, 04-27-2016 10:09 AM
    homoscedasticity, linearity, multiple regression
    • Replies: 2
    • Views: 1,530
    05-08-2016, 08:21 PM Go to last post
  41. [Mplus] Decreasing iterations changes p value

    I'm doing longitudinal regression analysis using mplus, with cross-lagged models. In my analyses, I compare two models: one without constraints (H0),...

    Started by Delforterie‎, 05-20-2014 04:29 AM
    • Replies: 0
    • Views: 1,529
    05-20-2014, 04:29 AM Go to last post
  42. Is poisson regression appropriate?

    This is more of a general stats question regarding the best procedure to answer my question of interest. I started to address it using poisson...

    Started by mrlang02‎, 10-10-2014 02:22 PM
    poisson regression
    • Replies: 0
    • Views: 1,529
    10-10-2014, 02:22 PM Go to last post
  43. Help pls! :( OLS firm fixed effects model with time varying and invariant interaction

    Dear all, My paper proposal was just declined. Appearantly, I estimated the wrong model and have only 2 days to correct it. I ran ols...

    Started by lemza‎, 08-09-2012 10:13 AM
    • Replies: 0
    • Views: 1,528
    08-09-2012, 10:13 AM Go to last post
  44. Event Study where event is correlated with index

    Hello, I am trying to conduct an event study using the traditional market model: StockReturn = Constant + IndexReturn + DummyVariable + Error ...

    Started by rocker‎, 03-25-2013 06:39 AM
    • Replies: 3
    • Views: 1,528
    03-28-2013, 08:54 PM Go to last post
  45. Question on interpreting test statistics/regression coefficients

    When I run a regression of: logwage = height + dummy variables for each different occupation The coefficients on the dummy variables are all...

    Started by dataset‎, 02-23-2014 04:34 PM
    • Replies: 3
    • Views: 1,528
    03-01-2014, 05:18 PM Go to last post
  46. Logistic regression p-value significance

    Dear all, I have done logistic regression for 20 independent variables for which all of them are categorical (0 and 1) also 1 binomial response...

    Started by smurts‎, 08-07-2014 12:44 PM
    • Replies: 3
    • Views: 1,527
    08-07-2014, 02:17 PM Go to last post
  47. Minimum number of cases for the reference level

    Before I ask this I have the true population so I am not sure this issue even applies :p Is there a minimum number of cases the reference level...

    Started by noetsi‎, 04-25-2016 01:22 PM
    • Replies: 7
    • Views: 1,527
    04-26-2016, 03:59 PM Go to last post
  48. Principal component analysis problem

    Hi, My question is about Principal component analysis(PCA). Suppose we have five variables X1,X2,X3,X4 and X5 (all are correlated). We find five PCA...

    Started by Arumairajan‎, 02-25-2013 02:33 PM
    • Replies: 1
    • Views: 1,526
    02-25-2013, 02:49 PM Go to last post
  49. Which model?

    Hi, I'm writing my master thesis and I don't really know which model to use. The response variable is a countvariable: the number of broilers...

    Started by LukasVO‎, 05-06-2013 03:54 AM
    • Replies: 7
    • Views: 1,525
    05-06-2013, 05:51 PM Go to last post
  50. Binary Logistic Regression- SPSS Output

    Dear TalkStats Forum, I am currently looking into a data-set which measures previous cyber-crime victimization as well as whether the participants...

    Started by Dulusu‎, 03-02-2015 09:36 AM
    • Replies: 1
    • Views: 1,525
    03-03-2015, 03:58 PM Go to last post
  51. Detecting fake results

    Hello everyone, I am currently working together with a fellow student on analyzing what factors affect profitability in banking, by using a...

    Started by Eina‎, 08-19-2016 12:07 PM
    • Replies: 5
    • Views: 1,525
    08-19-2016, 03:40 PM Go to last post
  52. Number of Observations Question

    I am currently completing a research project on a certain type of fund. I would like to conduct a time series. It is my aim to analyse the...

    Started by Student_Researcher‎, 02-21-2012 11:47 AM
    number of observations
    • Replies: 0
    • Views: 1,524
    02-21-2012, 11:47 AM Go to last post
  53. Unhappy Autocorrelation in nonlinear models

    Good morning! I'm running a random effects logit (xtlogit with stata) and cannot find how to test for autocorrelation. Has anyone an idea? Things...

    Started by Andy‎, 09-11-2012 02:12 AM
    • Replies: 0
    • Views: 1,524
    09-11-2012, 02:12 AM Go to last post
  54. Interaction term in multiple regression with categorical variables

    Hello everybody, I have question concerning categorical variables and multiple regression: My Scenario: I have two independent categorical...

    Started by Baba‎, 07-25-2013 03:26 AM
    categorical vairable, interaction term, product, regression
    • Replies: 0
    • Views: 1,523
    07-25-2013, 03:26 AM Go to last post
  55. Appropriate model for (repeated) data

    I have some cross-sectional data, where I'm interested in estimating a relationship between the "number of items in use" in sector i of country j and...

    Started by longshot‎, 08-01-2014 07:58 PM
    regression analysis, regression equation, regression models, repeated cases, repeated measurements
    • Replies: 0
    • Views: 1,523
    08-01-2014, 07:58 PM Go to last post
  56. Interpreting multiple regression beta values

    Basic question here but just want to double check my understanding.. When I do a multiple regression I get beta values b1=0.01 and b2=0.7 This...

    Started by jfw13‎, 11-27-2014 11:43 AM
    beta values, regression
    • Replies: 5
    • Views: 1,523
    11-27-2014, 03:33 PM Go to last post
  57. SQReg demonstration

    Hello everyone, i need help with this demonstration: SQReg = B1^2*Sxx Someone can help?

    Started by Calion‎, 06-05-2016 11:35 AM
    • Replies: 1
    • Views: 1,523
    06-06-2016, 12:22 PM Go to last post
  58. REGRESSION are these real findings or outcomes of preexisting differences?

    Hi guys, I have a N=138 sample that consists of 56 participants form one country and 82 from another country. When i run a stepwise regressions...

    Started by coffeehipster‎, 11-15-2014 07:55 PM
    • Replies: 2
    • Views: 1,522
    11-17-2014, 07:27 PM Go to last post
  59. Two categorical variables, one continuous dependent variable

    Hi, I want to check whether linear regression is the statistical tool I need and ways of checking whether my data is appropriate for this...

    Started by SpoodleBeast‎, 06-15-2016 03:33 PM
    • Replies: 3
    • Views: 1,522
    06-17-2016, 12:23 PM Go to last post
  60. statistical robustness analysis in minitab

    Hello! I was asked to comment on statistical robustness analysis in minitab, but honestly I don't know much about it. Can anyone help me...

    Started by kaczka03‎, 11-29-2015 04:11 PM
    • Replies: 0
    • Views: 1,521
    11-29-2015, 04:11 PM Go to last post

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