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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. cox regression and change

    I'm no statistician, but a porgrammeur. I have some statistics during my study, but is not really one of my stektste points. 'm Trying to calculate...

    Started by Zaatlob‎, 09-24-2010 09:27 AM
    • Replies: 0
    • Views: 2,190
    09-24-2010, 09:27 AM Go to last post
  2. Smile Cox/ Binomial Regression: How to reconcile Non-significant model with significant IVs

    Hello I'm been performing some survival and regression analyses corresponding to an event of interest being death or a certain surgical procedure,...

    Started by illmatic_statistic‎, 04-06-2015 06:15 PM
    binomial logistic regress, cox regression, interpreting regression, wald test
    • Replies: 2
    • Views: 1,903
    04-07-2015, 06:03 PM Go to last post
  3. crazy b and exp(b) in logistic

    Hi I'm running an interaction in logistic regression and when I do so my b and exp(b) for one of my main effect variables gets crazy. I know that...

    Started by dce219‎, 05-27-2011 11:40 AM
    • Replies: 4
    • Views: 2,736
    05-27-2011, 01:20 PM Go to last post
  4. 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: 1,927
    04-29-2012, 06:26 AM Go to last post
  5. Creating composit variables

    I have a literature supported construct and I need to join two variables together (one is a count of people <1K and the other is a count of things...

    Started by Jimmy B‎, 06-18-2014 08:06 AM
    • Replies: 0
    • Views: 1,190
    06-18-2014, 08:06 AM Go to last post
  6. Creating predicted probabilities from a categorical IV in a logit (with syntax)

    So. I have a binary outcome that is begin predicted by a race IV which has 4 categories. here is my output: LOGISTIC REGRESSION VARIABLES...

    Started by jsayn‎, 07-09-2015 02:24 PM
    • Replies: 2
    • Views: 1,141
    07-09-2015, 06:10 PM Go to last post
  7. Criterion for outliers

    Hi, I have a simple question, what's the best way to report the criterion you used to identify outliers? I used casewise diagnostics, outliers...

    Started by stats-student‎, 02-21-2013 12:32 PM
    • Replies: 4
    • Views: 3,128
    02-22-2013, 03:34 AM Go to last post
  8. Critique my endogeneity proof.

    solved solved

    Started by derksheng‎, 06-23-2012 07:03 AM
    • Replies: 0
    • Views: 1,814
    06-23-2012, 07:03 AM Go to last post
  9. Cross check the regression equation correctness

    People, i have this problem From the following data obtain the two regression equations Sales 06 02 10 04 08 Purchase09 11 05 08 07 i...

    Started by raviepic3‎, 06-23-2011 01:09 PM
    check answer, regression equation
    • Replies: 0
    • Views: 1,717
    06-23-2011, 01:09 PM Go to last post
  10. Cross sectional Regression Analysis

    Hi, I am a currently doing my coursework on the factors impacting on the dividend policy in the financial sector in Mauritius. The problem is that...

    Started by Galvin‎, 11-19-2011 01:17 PM
    • Replies: 1
    • Views: 2,460
    11-19-2011, 01:23 PM Go to last post
  11. Cross validation

    Hello, I have a basic question about cross validation and regression model. what is the final regression model made from? I mean the final model...

    Started by Bahareh‎, 10-01-2015 03:53 AM
    • Replies: 5
    • Views: 2,956
    10-01-2015, 12:07 PM Go to last post
  12. Cross validation bandwith selection

    Hi, is there a package in R for cross-validation optimal bandwith selection for nonaparemtric regression/autoregression functions estimation? (for...

    Started by Torch‎, 06-18-2011 03:46 AM
    • Replies: 1
    • Views: 3,758
    06-18-2011, 09:52 AM Go to last post
  13. Cross validation in SPSS

    Hi, I need to conduct cross validation of my data to check for predictive validity. This is what I did so far. I divided the sample into two...

    Started by milehigh899‎, 06-10-2013 08:34 AM
    • Replies: 6
    • Views: 13,628
    06-19-2013, 03:34 AM Go to last post
  14. Cross-sectional dependence, heteroskedasticity and serial correlation

    *** solved

    Started by Wooly‎, 10-24-2016 02:51 PM
    cross-sectional, econometrics
    • Replies: 0
    • Views: 877
    10-24-2016, 02:51 PM Go to last post
  15. cross-validated AUC

    Hello All, I hope the thread's title makes sense to you. I need to perform internal Cross-Validation using k-fold CV (needless to say, to assess how...

    Started by gianmarco‎, 11-25-2015 02:42 AM
    • Replies: 10
    • Views: 2,261
    11-27-2015, 03:32 PM Go to last post
  16. 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: 3,348
    08-21-2013, 09:11 AM Go to last post
  17. Cubic polynomial regression - Correlation coefficient

    How to compute the Correlation Coefficient of third degree polynomial regression? Using R and Statgraphics I only get R2, wich I believe that is...

    Started by Fernando Andreacci‎, 11-01-2011 05:56 PM
    • Replies: 0
    • Views: 3,968
    11-01-2011, 05:56 PM Go to last post
  18. cumulative odds ratios - additive or exponential?

    I have run some regression models that examine the effect of variable X (a 15 point continuous scale) on Y (a binary variable - didn't perform/did...

    Started by Marvelli‎, 10-30-2013 11:16 AM
    logistic regression, odds ratio
    • Replies: 3
    • Views: 3,245
    10-31-2013, 11:49 AM Go to last post
  19. Smile curvature

    I have a set of data that i would like to find out if it has a curvature. i was told that you can apply ANOV analysis to see if curvature is...

    Started by alshajara‎, 11-16-2012 12:14 PM
    • Replies: 1
    • Views: 1,526
    11-16-2012, 11:57 PM Go to last post
  20. Curve estimation command in SPSS to help determine type of regression?

    Hi everyone, will the curve estimation command in SPSS help me in determining the type of regression? For example, I am doing regression between...

    Started by graphicsgriffin‎, 07-01-2011 04:33 PM
    • Replies: 0
    • Views: 7,376
    07-01-2011, 04:33 PM Go to last post
  21. Curve Estimation in SPSS

    Hi all, I have 2 variables: time & cost - Time: 0%, 10%, ..., 100% (11 variables) - Cost: 11 variables I want to use 'Curve Estimation' in...

    Started by phehuyet‎, 04-25-2014 01:26 AM
    • Replies: 0
    • Views: 2,770
    04-25-2014, 01:26 AM Go to last post
  22. 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: 998
    07-13-2014, 11:11 AM Go to last post
  23. 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: 5,881
    05-06-2012, 11:29 AM Go to last post
  24. Cutoff points in logistic regression

    One of the articles I am reading now makes reccomendations for changing the cuttoff point used in predicting whether Y=1 or 0. My question is, since...

    Started by noetsi‎, 07-05-2013 12:34 PM
    • Replies: 6
    • Views: 13,412
    03-27-2014, 08:17 AM Go to last post
  25. Damage Assessment

    I apologize for this question being exceedingly vague, but I'm not sure of the correct terminology. After running a regression analysis, I have...

    Started by DCohen‎, 05-23-2008 03:17 PM
    • Replies: 4
    • Views: 3,064
    05-25-2008, 09:07 AM Go to last post
  26. Data for regression analysis

    I am helping a friend with a project involving regression analysis. First off he wants to know if there is a way to determine if the extracted data...

    Started by c2q‎, 05-06-2011 06:43 PM
    • Replies: 4
    • Views: 2,399
    05-07-2011, 11:53 AM Go to last post
  27. Data forecast

    Hello, I'm not exactly sure if this is the right forum, or even if what I'm looking for is actually called data-forecasting, but here's my question...

    Started by jepperaskdk‎, 07-30-2016 05:52 PM
    • Replies: 1
    • Views: 1,017
    07-31-2016, 03:17 PM Go to last post
  28. Question Data input- ordered logistic regression

    Hello, I am trying to analyze the relationship between mode familiarity and Technology & demographic characteristics. So I have an ordinal dependent...

    Started by paranjyoti‎, 01-05-2017 09:09 AM
    data analysis, logistic regression, regression analysis, spss
    • Replies: 0
    • Views: 1,725
    01-05-2017, 09:09 AM Go to last post
  29. Data Mining Methods with Nested Data

    I have three general questions that I am really struggling to answer: a) When we have nested data (e.g. employees nested in departments which are...

    Started by triunk‎, 05-27-2014 02:24 PM
    data mining, feature selection
    • Replies: 0
    • Views: 1,733
    05-27-2014, 02:24 PM Go to last post
  30. Data Normalization

    I have a problem that is challenging to me about fitting coefficient parameter. Here is the problem data (simple example) ...

    Started by wutao9999‎, 04-10-2015 12:30 PM
    • Replies: 1
    • Views: 1,659
    04-10-2015, 01:43 PM Go to last post
  31. Data pooling and regression analysis

    Dear All I have a question about data pooling and regression analysis, i have tried to read some basic statistic book, but still not answering my...

    Started by mchoud‎, 02-21-2006 10:48 AM
    • Replies: 4
    • Views: 5,373
    02-21-2006, 12:15 PM Go to last post
  32. Data problem

    I need a little help about a guidance how to represent "unlimited" as a value in regression variable. For example, some phone plans includes...

    Started by john_f‎, 01-09-2015 05:36 PM
    regresion
    • Replies: 2
    • Views: 1,424
    01-09-2015, 07:34 PM Go to last post
  33. Data Question

    Ok I am trying to look at the relationship of sales

    Started by student865‎, 11-10-2011 01:51 PM
    • Replies: 5
    • Views: 1,970
    11-10-2011, 04:02 PM Go to last post
  34. Data scattered around y=x

    Hello everyone, I am a researcher in engineering. I do have some background on statistics and mathematics in general, but I am not a professional...

    Started by math4engz‎, 04-23-2017 08:28 AM
    r squared, regression, statistics
    • Replies: 14
    • Views: 1,511
    04-25-2017, 08:15 PM Go to last post
  35. Data set simulation

    Answered on other threads, sorry for posting

    Started by David2‎, 07-07-2016 12:07 PM
    correlation, regression, simulation
    • Replies: 1
    • Views: 2,171
    07-07-2016, 01:12 PM Go to last post
  36. Data Transformations in Multiple Regression

    I have a non-normal distribution for the residuals I'm testing for a multiple regression--what's the best course of action to take? If I transform...

    Started by Pachy‎, 06-03-2011 08:05 PM
    • Replies: 1
    • Views: 4,351
    06-03-2011, 09:07 PM Go to last post
  37. Cool Datasets for Multiple Linear Regression - How To get the Raw Data ?

    Hello everyone. kindly need ur help.. where can i get the raw data for multiple linear regression. the data should have : Atleast (5 variable)...

    Started by syafgy‎, 06-13-2013 05:32 PM
    multi linear regression
    • Replies: 2
    • Views: 4,104
    06-14-2013, 09:22 AM Go to last post
  38. Date as a Covariate

    Hi, I am looking at the effect of various weather variables on sub-population size of a certain species of snake. Sub-population size at the study...

    Started by joel‎, 02-26-2014 11:42 AM
    covariate, regression, seasonality, weather, wildlife studies
    • Replies: 3
    • Views: 2,100
    02-28-2014, 12:01 AM Go to last post
  39. DEA Analysis

    Hi, I'm currently looking for some materials on DEA Analysis. Do you guys have any e-books or good webpages on this topic? I seek a material...

    Started by JennyX28X‎, 04-09-2015 09:42 AM
    • Replies: 5
    • Views: 1,994
    04-16-2015, 06:57 AM Go to last post
  40. Dealing with endogenous independent variables (Car Industry Project)

    I am running a regression on vehicle demand (vehicle registrations in 2011) with the following independent variables: Assembly location Price...

    Started by BellaRiley‎, 04-12-2013 01:27 PM
    endogenous, regression analysis, variables, vehicle
    • Replies: 0
    • Views: 1,192
    04-12-2013, 01:27 PM Go to last post
  41. Thumbs up Dealing with missing data?!

    Hi guys, I was wondering if anyone can help me figure out what to do, I am pretty bad at statistics but needs must and all that! :p Basically...

    Started by Royalty‎, 04-23-2011 11:03 AM
    • Replies: 7
    • Views: 6,609
    04-24-2011, 12:51 PM Go to last post
  42. Dealing with missing values

    I am analyzing the data of a cohort study.There are three sets of paired data (same measures on same subjects in 3 different point of time). The...

    Started by johnstatistic‎, 09-23-2016 08:54 AM
    missing values, regression model
    • Replies: 2
    • Views: 1,439
    09-27-2016, 06:54 AM Go to last post
  43. Dealing with multi-level categorical variables in regression

    Hi everyone, I have been working in R and using lmer() to run mixed-effect linear and logistic regression models to study language processing. ...

    Started by mgillespie‎, 02-16-2011 02:37 PM
    collinearity, dummy variables, regression
    • Replies: 0
    • Views: 5,930
    02-16-2011, 02:37 PM Go to last post
  44. Dealing with multicollinearity

    I have a following model: y=a+b1x1+b2x2+b3x1x2+b4x3+other terms $ Let's say, I am only interested in coefficient b3. The magnitude of coefficient...

    Started by smith.shrestha‎, 09-03-2015 06:53 AM
    multicollinearity, multiple regression
    • Replies: 4
    • Views: 1,707
    09-03-2015, 10:19 AM Go to last post
  45. Dealing with Null values in Differenced Data

    Hi everyone, I'm running a regression analysis to try and explain the effect of advertising on brand interest. Essentially, what I want to be able...

    Started by statguy_33‎, 11-08-2010 08:40 PM
    • Replies: 0
    • Views: 2,234
    11-08-2010, 08:40 PM Go to last post
  46. Dealing with outliers

    We have this discussion from time to time, but it has become more pertinant to me now... Before I begin I should note that I am not really interested...

    Started by noetsi‎, 12-30-2014 10:09 AM
    • Replies: 7
    • Views: 3,539
    12-30-2014, 10:16 PM Go to last post
  47. Dealing with temporal autocorrelation

    Hi, assume we have a measured value for each year from 1990-210, and we want to estimate a linear trend. Now there is a problem of...

    Started by mmercker‎, 01-10-2017 03:22 AM
    additive, autocorrelation, gam, regression, trend
    • Replies: 2
    • Views: 2,781
    01-10-2017, 11:39 AM Go to last post
  48. Dealing with violations of the assumptions.

    I thought I had this covered in detail, but if so I apparently lost it. When you discover you have non-normal residuals the first suggestion is...

    Started by noetsi‎, 04-21-2015 03:51 PM
    2 Pages
    1 2
    • Replies: 28
    • Views: 5,155
    04-28-2015, 07:47 AM Go to last post
  49. Smile Death to Stepwise

    A chapter title in a regression book I once read :p This article notes problems with the use of stepwise in the way it is commonly used....

    Started by noetsi‎, 04-11-2013 11:40 AM
    • Replies: 0
    • Views: 1,516
    04-11-2013, 11:40 AM Go to last post
  50. Decision keeping significant variables in Multinomial Logistic Regression?

    Hi! I have a question regarding how to decide which variables to keep in a multinomial logistic regression model. As example we can choose: ...

    Started by henrikskiold‎, 07-17-2013 05:46 AM
    • Replies: 1
    • Views: 2,054
    07-17-2013, 09:36 AM Go to last post
  51. Decomposing a regression coefficient - Desperate for help

    Hi, I apologize in advance if this is a very stupid question but I cannot for the life of me figure out how to do this. I want to regress the...

    Started by babudabi‎, 03-08-2014 04:11 AM
    • Replies: 0
    • Views: 1,048
    03-08-2014, 04:11 AM Go to last post
  52. 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: 1,174
    10-18-2016, 01:50 PM Go to last post
  53. 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: 1,174
    11-21-2015, 12:29 PM Go to last post
  54. Degrees of freedom for a moving average?

    Can someone please help me to determine the correct number of degrees of freedom used when calculating a moving average? For example, with annual...

    Started by Joz‎, 09-11-2012 12:36 AM
    degrees of freedom, moving average
    • Replies: 0
    • Views: 5,645
    09-11-2012, 12:36 AM Go to last post
  55. Degrees of Freedom in case of multiple regression?

    What does dof of each predictor show in case of multiple regression? Instead of explaining mathematically, could anyone explain the physical...

    Started by convivial‎, 07-19-2010 06:41 AM
    • Replies: 3
    • Views: 4,415
    07-19-2010, 10:21 AM Go to last post
  56. Deleting unhelpful observations from model?

    Hi, I'm using panel data on the sales of various products to estimate price elasticities, which basically means running a regression model that...

    Started by Statzor‎, 07-10-2012 11:28 AM
    • Replies: 0
    • Views: 1,238
    07-10-2012, 11:28 AM Go to last post
  57. Delogging variables

    Hey, I have run a multiple regression. DV is change in the log of assets Parameter Expected Sign Parameter (T stat) Chlnx ...

    Started by iloveireland‎, 09-25-2014 03:18 AM
    • Replies: 0
    • Views: 1,142
    09-25-2014, 03:18 AM Go to last post
  58. Demonstrate that dependent variable is correlated with random error term

    The hint - show that if e rises, dependent variable Y also rises. C=a+bY+e Y=C+I C - consumption function Y - GDP I - investment e...

    Started by E574‎, 05-06-2011 05:47 PM
    • Replies: 0
    • Views: 2,669
    05-06-2011, 05:47 PM Go to last post
  59. Dependent / conditional regression?

    Hi there! Long time lurker, first time poster (first post in ANY board), so my sincerest apologies if I'm doing anything wrong! I have searched...

    Started by Murphy-dk‎, 08-11-2009 05:23 AM
    • Replies: 0
    • Views: 2,041
    08-11-2009, 05:23 AM Go to last post
  60. Dependent categorical variable

    If y is a dependent categorical variable (values 1,2,3) , then how would you show that y is dependent on x1 and x2? My rational is to use a...

    Started by samulleg364‎, 02-13-2012 01:06 PM
    • Replies: 2
    • Views: 1,704
    02-13-2012, 01:57 PM Go to last post

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