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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. 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: 1,545
    06-01-2011, 01:29 PM Go to last post
  2. predicting X using multiple regression?

    Hello: I have been reviewing a study in which Multiple Linear Regression (MLR) was used to evaluate the relationship between the concentration of...

    Started by AquaMan‎, 09-11-2009 04:56 PM
    • Replies: 0
    • Views: 2,064
    09-11-2009, 04:56 PM Go to last post
  3. A question about bimodality.

    First question - if my Y variable has a bimodal distribution, is it at all possible to run a regression on this variable? Second - if my Y...

    Started by aquietplace‎, 03-29-2008 01:22 PM
    • Replies: 1
    • Views: 2,154
    03-29-2008, 01:24 PM Go to last post
  4. Panel Data: Vary in time but constant for all individuals

    Dear all, we are using a standard panel model like Y_it = a_i + b*X_it + e_it. For one additional variable (prices=P) we only have observations...

    Started by ARDE‎, 01-30-2013 07:43 AM
    panel, stata
    • Replies: 0
    • Views: 1,261
    01-30-2013, 07:43 AM Go to last post
  5. Spatial Econometrics - Bias?

    Dear all, I seem to be lost with the following problem in spatial econometrics: Assume the true model is a spatial error model (SEM). It is...

    Started by ARDE‎, 01-03-2014 06:18 AM
    bias, sem, spatial, spatial econometrics
    • Replies: 0
    • Views: 2,222
    01-03-2014, 06:18 AM Go to last post
  6. Autocorrelation Remedy Help

    For my bachelor thesis I need to regress historical stock price with earning per share. My data consist of eleven years period with yearly...

    Started by ardinea‎, 07-21-2012 11:12 AM
    • Replies: 1
    • Views: 1,935
    07-24-2012, 07:30 AM Go to last post
  7. A query related to Bayesian Regression

    I had a query related to Bayesian Regression and I was wondering if someone had any ideas : So in the proper Bayesian case, we have the following...

    Started by ardur‎, 06-22-2011 06:42 PM
    noparse
    • Replies: 0
    • Views: 1,689
    06-22-2011, 06:42 PM Go to last post
  8. Determining weighting factors from linear regression

    Hi, I am working on a digital filtering project where I am trying to optimize a filter for a Doppler ultrasound application. Without going in to...

    Started by arefox‎, 03-26-2012 06:20 PM
    • Replies: 0
    • Views: 3,134
    03-26-2012, 06:20 PM Go to last post
  9. 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: 2,821
    04-16-2012, 05:57 PM Go to last post
  10. Need help with analysis for my dissertation

    Hi, I wonder if someone in this forum offers the service of data analysis (regressions) and accept paypal payment. I need to analyze some variables...

    Started by argentina82‎, 08-14-2010 01:20 AM
    • Replies: 1
    • Views: 2,121
    08-14-2010, 02:42 AM Go to last post
  11. Another question re: correlation and regression

    I seem to be getting confused between correlation and regression a bit... I'm trying to identify the relationship between a series of X variables...

    Started by arikel‎, 03-19-2008 01:25 PM
    • Replies: 3
    • Views: 2,483
    03-20-2008, 11:38 AM Go to last post
  12. One dependent variable contingent upon another

    I am running two separate regression analyses where I have the same set of independent variables but in one case the dependent variable (DV1) is a...

    Started by arindam‎, 06-26-2012 05:17 AM
    contingent, regression
    • Replies: 1
    • Views: 2,090
    06-29-2012, 12:50 PM Go to last post
  13. Multivariate regression with sparse data for a few independent variables

    In my analysis I have several independent variables. My dataset has 2000 records but for a few variables the data is sparse, i.e., information is...

    Started by arindam‎, 12-27-2012 09:26 PM
    dummy variable, regression analysis, sparse data
    • Replies: 0
    • Views: 1,311
    12-27-2012, 09:26 PM Go to last post
  14. Plz help...LOG transformation of Ratio in Percentage Independent variable

    Hi, In my regression I have used a ratio term (in %) as the independent variable. That value ranges from 0.0001% to 99.95%. Can I take the log of...

    Started by arindamelec‎, 05-30-2014 05:36 AM
    independent variable, log, ratio, regresion
    • Replies: 0
    • Views: 1,668
    05-30-2014, 05:36 AM Go to last post
  15. Regression Help! to predict performance using the output of questionaire

    Hi All, Somebody pl. helpe me in the brlow case, As a part of academic project, im intrested in measuring performance of purchase dpeartment in a...

    Started by Arjun‎, 02-22-2012 05:08 AM
    multiple regression, regression analysis
    • Replies: 13
    • Views: 3,022
    02-28-2012, 01:12 AM Go to last post
  16. R-Sq Relevance

    Hi, I have the following figures after creating a linear regression model using mintab: S = 2.65155 R-Sq = 31.8% R-Sq(adj) = 31.6% PRESS...

    Started by arkantosno1‎, 08-15-2012 04:36 AM
    • Replies: 3
    • Views: 3,123
    08-15-2012, 10:53 AM Go to last post
  17. what is the highest number of variables to use for regression analysis?

    Hi, Just wanted to ask what people thought was the highest number of variables could be used with regression analysis? Also, are there other...

    Started by arkantosno1‎, 09-01-2012 09:37 AM
    • Replies: 5
    • Views: 1,277
    09-01-2012, 01:43 PM Go to last post
  18. 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: 2,976
    09-02-2013, 04:55 AM Go to last post
  19. LH ratio significant but covariates not?

    I have performed Cox regression analysis using Forward LR method. As a results two covariates are included in the final model. First one has two...

    Started by arkiaamu‎, 09-03-2013 01:45 PM
    • Replies: 5
    • Views: 1,772
    09-06-2013, 10:06 AM Go to last post
  20. positive loglikelihood?

    It seems to be no issue to have positive log likelihood in linear regression. How should I however interpret two positive LLs? In normal situation...

    Started by arkiaamu‎, 10-11-2014 07:45 AM
    • Replies: 1
    • Views: 2,414
    10-11-2014, 10:07 AM Go to last post
  21. Use of scale () function and conflicting standardized values for fixed effects

    Hi, I'm currently using the scale() function in a glmer model (see below) and I'm having some inconsistencies between my standardized coefficient...

    Started by arl139‎, 02-04-2015 08:12 AM
    • Replies: 0
    • Views: 1,735
    02-04-2015, 08:12 AM Go to last post
  22. Fixed term is (Intercept) --Dredge function

    Hi, i'm currently running a glm model in R and have attempted to use the following code: Model:...

    Started by arl139‎, 02-05-2015 09:52 PM
    dredge, glm, logistic regression
    • Replies: 2
    • Views: 6,098
    02-05-2015, 11:08 PM Go to last post
  23. Logistic regression and significance of continuous variables across 3 periods

    I'm currently working on a logistic regression analysis in R with a binary response variable (0 = non-used; 1 = used location). I am modeling...

    Started by arl139‎, 05-12-2015 07:28 AM
    logistic regression, regresiion
    • Replies: 3
    • Views: 1,654
    05-12-2015, 12:22 PM Go to last post
  24. When should I report heteroskedasticity robust standard errors?

    With regard to a master's thesis in economics I am working on I am running six regressions (see attachment). I find evidence for heteroskedasticity...

    Started by arnetheman‎, 03-29-2012 07:22 AM
    • Replies: 0
    • Views: 2,040
    03-29-2012, 07:22 AM Go to last post
  25. Control variable for panel analysis

    i am writing a paper analyzing What is the effect of corruption on Government expenditure (education,health,military and infrastructure). I have data...

    Started by arni‎, 12-16-2015 06:55 AM
    variable
    • Replies: 0
    • Views: 1,059
    12-16-2015, 06:55 AM Go to last post
  26. Smile Running multple, multiple regressions? which statistical test should i use?

    I have done a study on whether personality and demographics predict interaction on facebook brand pages. I have used a Big five personality scale...

    Started by arnika‎, 11-21-2014 09:22 AM
    correlation, regression, spss
    • Replies: 5
    • Views: 2,336
    11-22-2014, 08:18 AM Go to last post
  27. statement regarding estimators for econometrics

    statement: when an estimator is unbiased and efficient, does it mean parameters can be estimated accurately? my opinion: no there is need of more...

    Started by Arno050‎, 11-30-2012 12:20 PM
    • Replies: 2
    • Views: 1,601
    11-30-2012, 12:51 PM Go to last post
  28. Multiple variable regression(BUT only one coefficient to be estimated)

    Dear, For our master thesis we need to regress the equation Pt-P(t-1)= S/2*(Qt-Q(t-1))+Beta*S/2*(Qt-1)+et or http://prntscr.com/6q81o8 It...

    Started by Arno050‎, 04-06-2015 06:11 AM
    • Replies: 0
    • Views: 1,177
    04-06-2015, 06:11 AM Go to last post
  29. Question about Regression and relationship testing

    Hello, I am working on a project that is trying to look a possible correlation between BMI and various outcomes in a patient group. So the BMI...

    Started by artaxerxes‎, 02-03-2012 10:24 AM
    • Replies: 5
    • Views: 2,424
    02-03-2012, 01:04 PM Go to last post
  30. Moderated regression - how to create the graph for some (not all) variables.

    I've run into a problem and I was hoping someone could help me out. My research question is whether beliefs about controllability of weight...

    Started by artemisynn‎, 08-12-2014 05:13 AM
    • Replies: 0
    • Views: 1,172
    08-12-2014, 05:13 AM Go to last post
  31. regression analysis reporting: chemist needs help!

    Hello, everyone. We have some regression data we'd like to report, but aren't sure how to best do so. Here's the situation: A lab analyst runs a...

    Started by artie mckim‎, 02-15-2015 10:28 AM
    • Replies: 0
    • Views: 2,670
    02-15-2015, 10:28 AM Go to last post
  32. Exclamation Variance of a corrected regression coefficient

    Ppl I really need help! Please, help me solve it: Consider the model Yi = b0 + b 1Xi +ei e_i~N(0,s^2_e) iid X_i_N(m_x,s^2_x) iid Z_i = X_i +...

    Started by Arttemus‎, 06-05-2012 11:19 AM
    • Replies: 1
    • Views: 1,547
    06-05-2012, 05:20 PM Go to last post
  33. Generating correlated predictors data and dependent data in r

    Dear all, I need correlated both predictors data and dependent data in r. My problem is given as follows. We adopt a p=4 parameter model and...

    Started by Arumairajan‎, 02-05-2013 01:19 PM
    • Replies: 2
    • Views: 1,661
    02-14-2013, 01:04 PM Go to last post
  34. 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: 1,521
    02-25-2013, 02:49 PM Go to last post
  35. Random Variable

    Dear all, My question is let X be a random variable. If X=0 what is the value for E(X)? (is this always zero?) Mr.Sivaraj.

    Started by Arumairajan‎, 02-19-2013 02:04 AM
    • Replies: 3
    • Views: 2,235
    02-19-2013, 09:40 AM Go to last post
  36. Post Multiple linear regression

    Dear all, My question is, Why we use W, LR and LM tests instead of F tests to develop the preliminary test estimatior in a multiple linear...

    Started by Arumairajan‎, 05-21-2013 12:15 AM
    • Replies: 1
    • Views: 1,091
    05-21-2013, 02:40 PM Go to last post
  37. 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: 3,329
    08-21-2013, 09:11 AM Go to last post
  38. Comparison of regression coefficients between (nested) geographic regions

    Hi All, I would like to compare the effect of an explanatory variable (say X1) on a response variable (Say Y) between two geographic regions in...

    Started by arun‎, 04-11-2016 08:54 PM
    comparison, regression, standardization
    • Replies: 0
    • Views: 1,441
    04-11-2016, 08:54 PM Go to last post
  39. Linear model accounting for fixed effects vs. ordered probit

    I originally ran an ordered probit model on an ordinal dependent variable (values 1-12), however in order to account for fixed effects in my analysis...

    Started by ARW90‎, 02-04-2012 10:38 AM
    econometrics, fixed effects, ordered, probit
    • Replies: 3
    • Views: 3,813
    02-05-2012, 01:44 PM Go to last post
  40. 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: 2,243
    08-28-2013, 03:54 PM Go to last post
  41. Post which regression analysis model shall i use?

    i am conducting a research on 9 insurance companies from which a 5 year data is collected. Thus, i have to use panel model, but which model fixed...

    Started by asamnew‎, 03-21-2012 04:55 AM
    • Replies: 0
    • Views: 1,405
    03-21-2012, 04:55 AM Go to last post
  42. Rare suppressor effect?

    Hey, I recently discovered a somewhat surprising result in a hierarchical regression: I have three predictors (C M N) and one outcome (D). ...

    Started by asbjorng‎, 03-18-2014 03:40 AM
    • Replies: 2
    • Views: 1,473
    12-06-2015, 06:45 AM Go to last post
  43. 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: 5,432
    05-14-2012, 09:50 AM Go to last post
  44. Multiple Regression analysis

    Hello Everyone, Can anyone please tell me, how one can compute the total score of dependent variables in order to do regression analysis?? ...

    Started by ashima‎, 05-15-2013 07:52 AM
    • Replies: 8
    • Views: 1,923
    05-16-2013, 02:31 AM Go to last post
  45. Defining relation of a fold over design

    Dear All, I am reading the book DC Montgomery on my own. The book says that the defining relation for a foldover design will have L + U - 1 words...

    Started by ashimkapoor‎, 10-18-2016 01:50 PM
    doe
    • Replies: 0
    • Views: 1,154
    10-18-2016, 01:50 PM Go to last post
  46. Pearson's correlation coefficient (Excel help)

    Hello, new user here :) I have created distance matrices for two data sets (a ligand and it's receptor) and I now must compute the linear...

    Started by Ashmore‎, 12-03-2011 07:28 AM
    • Replies: 1
    • Views: 2,082
    12-07-2011, 08:10 PM Go to last post
  47. Please help

    Dear forum guys! I've got a issue with a simple regression in excel (or maybe it's a Z-test problem, that is what I was told). There is a time...

    Started by Ashot‎, 06-21-2014 02:17 PM
    • Replies: 0
    • Views: 1,363
    06-21-2014, 02:17 PM Go to last post
  48. Segmenting a Logistic Regression Model

    Hi All, I am trying to build a Logistic Regression model . In my model i have 4 different variables( with 3 levels each) on which i am trying to...

    Started by ashukla‎, 02-15-2013 06:32 PM
    • Replies: 0
    • Views: 1,494
    02-15-2013, 06:32 PM Go to last post
  49. Degree of Freedom in extra sum of squares

    Give the degrees of freedom associated with a)SSR(X_1|X_2) b)SSR(X_2|X_1,X_3) c)SSR(X_1,X_2|X_3,X_4) d)SSR(X_1,X_2,X_3|X_4,X_5)

    Started by askazy‎, 11-21-2015 12:29 PM
    • Replies: 0
    • Views: 1,167
    11-21-2015, 12:29 PM Go to last post
  50. Poisson regression for count data

    I need to fit a model to study the severity of a bicycle accident based on other explanatory variables. The data description is X1: is the use of...

    Started by askazy‎, 07-10-2016 07:24 AM
    • Replies: 1
    • Views: 1,922
    07-10-2016, 10:21 AM Go to last post
  51. How to study association between categorical variables?

    I have 4 categorical variables in a dataset let X1, X2, X3 and Y. Where X1,X2 and Y is a binary random variable and X3 have 3 categories. X1,X2...

    Started by askazy‎, 07-10-2016 12:33 PM
    • Replies: 6
    • Views: 1,243
    07-10-2016, 07:00 PM Go to last post
  52. Deviance residuals in model fitted via MCMC

    I fitted a regression model in a Bayesian approach via MCMC. The JAGS code for the model is model{ for(i in 1:n) { y ~ dbeta(alpha, beta) alpha...

    Started by askazy‎, 05-26-2017 09:39 PM
    • Replies: 0
    • Views: 739
    05-26-2017, 09:39 PM Go to last post
  53. Problem with Data analysis on Likert Scale!

    Hello John, Im a student of Business studies and am working on a research project titled as "Impact of Physical environment on Employee...

    Started by Asma Gm‎, 03-26-2008 05:56 AM
    • Replies: 10
    • Views: 16,180
    07-09-2016, 03:44 AM Go to last post
  54. How to avoid collinearity in regression

    Hi there, I am new in statistics so my question will be a bit naive. When I perform regression, some variables are excluded. It is, maybe, because...

    Started by AsoInfo‎, 09-05-2012 01:22 AM
    • Replies: 9
    • Views: 5,546
    09-09-2012, 06:57 AM Go to last post
  55. Regression Analysis Based on Condition

    Hi there, I am trying to do a regression analysis. My columns looks like this: AA 1 GG 2 AG 2 If the column 2 contains "2" so...

    Started by AsoInfo‎, 09-02-2012 12:49 AM
    conditional regression, regression analysis
    • Replies: 4
    • Views: 2,331
    09-02-2012, 11:59 PM Go to last post
  56. Error contribution from covariance in linear regression

    Hello, I try to consider the covariance in the error analysis of a linear regression with few data points. I could not find for this a worked...

    Started by Asterix‎, 07-24-2012 08:35 AM
    • Replies: 8
    • Views: 3,060
    08-02-2012, 08:07 AM Go to last post
  57. Exclamation Instrumental variables with S&P 500 Health Care Index

    Hello everyone, I am new to this forum and I would need some help on a time series regression model with financial variables. I am regressing...

    Started by AstosDG‎, 02-21-2017 04:19 PM
    instrumental variables, time series analysis
    • Replies: 3
    • Views: 1,917
    02-23-2017, 08:26 PM Go to last post
  58. Weird interaction results - need someone's help!

    I ran some hierachical multiple regression in SPSS, and plotted my significant interactions (I have all continuous predictors and outcomes). One of...

    Started by asugrad‎, 03-20-2009 07:33 PM
    • Replies: 0
    • Views: 2,210
    03-20-2009, 07:33 PM Go to last post
  59. Question Categorical variable as dependent variable

    I have a categorical variable which is like: "How much do you like the sun?" 1 not at all 2 not a great deal 3 neither/nor 4 quite a lot 5...

    Started by Athinagoras‎, 04-12-2013 09:00 AM
    categorical, categorical dependent, dpendent, dummy
    • Replies: 6
    • Views: 1,981
    04-12-2013, 11:28 AM Go to last post
  60. Probit/Logit independent variables

    Hello, My DV is a binary variable (Yes/No) and I am using a logit/probit regression analysis. As for my independent variables,there are three...

    Started by Athinagoras‎, 04-20-2013 07:45 AM
    logit model, probit regression
    • Replies: 4
    • Views: 1,587
    04-23-2013, 11:29 PM Go to last post

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