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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Multivariate linear regression analysis (multiple dependent variable, one independent

    I am trying to determine the reason why(and how many) people with health insurance do not fully use all of its benefits(like free flu vaccines). I am...

    Started by p_s‎, 08-03-2014 11:18 PM
    4 Pages
    1 2 3 ... 4
    • Replies: 48
    • Views: 1,220
    Yesterday, 10:30 PM Go to last post
  2. Use of factor analysis + regression

    Independent Variable: I have a survey of 50 states indicating the amount of control the state board of education has in 31 areas answered on a three...

    Started by cynicalflyer‎, Yesterday 11:49 AM
    • Replies: 4
    • Views: 103
    Yesterday, 07:36 PM Go to last post
  3. problem with linear multiple regression in R

    Hi, I have a problem to build and to explain the linear multiple regression. I have a data set called Cars93 with 26 variables and 93...

    Started by angersan‎, 08-18-2014 03:32 PM
    • Replies: 0
    • Views: 94
    08-18-2014, 03:32 PM Go to last post
  4. mixed predicator types for building logistic regression model

    There has a data set, some predicator variables are of categorical types, such as X1={A, B,C}; X2={1, 2, 3}; and other predicator variables are of...

    Started by winecoding‎, 08-18-2014 02:22 PM
    categorical dependent, logistic regression, variable selection
    • Replies: 0
    • Views: 54
    08-18-2014, 02:22 PM Go to last post
  5. Question Multivariate Regression when Independent Variables could have Dependencies

    First post, have looked and could not find this question elsewhere. Struggling with this so hopefully someone can help. I am trying to predict the...

    Started by GTsn311‎, 08-18-2014 11:08 AM
    interdependence, multivariable, regression
    • Replies: 0
    • Views: 47
    08-18-2014, 11:08 AM Go to last post
  6. Linear regression with an interaction variable

    I have a linear regression model: Dependent variable = α + independent variable 1 (continuous variable) + independent variable 2 (categorical) +...

    Started by VicB‎, 08-18-2014 10:30 AM
    • Replies: 0
    • Views: 44
    08-18-2014, 10:30 AM Go to last post
  7. linear specification vs. logarithmic specification

    Dear all When I do a box-cox test to evaluate whether to use a logarithmic transformation for my dependent variable (which are IRRs, and the...

    Started by weasel‎, 08-18-2014 07:29 AM
    • Replies: 2
    • Views: 65
    08-18-2014, 07:48 AM Go to last post
  8. Multiple Linear Regression Problem

    Hi, I want to do a multiple regression analysis. I have one Y which are numeric values (sample number = 85) and the following Xs. Sr...

    Started by Deccantraps‎, 08-17-2014 11:37 PM
    multiple regression, stepwise
    • Replies: 1
    • Views: 75
    08-18-2014, 01:13 AM Go to last post
  9. The absolute dependence in panel data

    Hello, I want to ask something related to the panel data analysis. In traditional regression and correlation analysis, it is clear that if the...

    Started by enchoj‎, 08-13-2014 03:55 AM
    • Replies: 1
    • Views: 91
    08-15-2014, 01:39 AM Go to last post
  10. Generalised Linear Model - with negative skewed DV

    Hi All, I am trying to fit a generalised linear model to which the dependant variable is negatively skewed. The DV ranges from 0 to 150 with 45%...

    Started by TheTransporter‎, 08-14-2014 10:52 PM
    • Replies: 0
    • Views: 67
    08-14-2014, 10:52 PM Go to last post
  11. Help: Bootstrap Regression (or not)

    I am an ecologist with enough statistics background to know I am confused. The trophic magnification factor (TMF) is a commonly used measure to...

    Started by mudminnow‎, 08-14-2014 10:36 AM
    • Replies: 0
    • Views: 91
    08-14-2014, 10:36 AM Go to last post
  12. When to use partial bivariate correlation and when to use multiple linear regression?

    Let's say I have X and Y and wonder how strongly they correlate, but am suspecting that Z is a confounder. What research question would lead me...

    Started by trexter‎, 08-14-2014 07:13 AM
    • Replies: 1
    • Views: 79
    08-14-2014, 08:23 AM Go to last post
  13. Interpretation CATREG interaction coefficient

    Hi everybody. I have done an Catreg analyses on my data and have included interaction variables (for example nutrient * sex). However sex is...

    Started by inge1804‎, 08-13-2014 10:01 AM
    catreg
    • Replies: 2
    • Views: 126
    08-14-2014, 01:48 AM Go to last post
  14. Problem/question regarding Cox Regression

    Hello! I am new to statistics and research and am looking for a little help. I am doing a study looking at the the effects of post-operative...

    Started by drronin9790‎, 08-13-2014 04:29 PM
    • Replies: 1
    • Views: 95
    08-13-2014, 08:39 PM Go to last post
  15. Moderator regression: plotting graphs from multiple product terms

    This is my first time posting, so apologies if I don't make sense. I've conducted a hierarchical regression analysis. I have multiple IVs whereby...

    Started by pete14678‎, 08-13-2014 10:57 AM
    moderated multiple regres, regression analysis, regression equation
    • Replies: 0
    • Views: 74
    08-13-2014, 10:57 AM Go to last post
  16. Plot for multiple regression

    Hi All, I have a very basic question. When I run a regression to predict Y from X, I basically draw a scatterplot in excel. I am wondering how...

    Started by mac101‎, 08-12-2014 02:48 PM
    multiple regression, regression plot
    • Replies: 9
    • Views: 176
    08-12-2014, 06:03 PM Go to last post
  17. Robustness check of univariate results

    Hi all I calculated several univariate regressions with different explanatory variables. Some are significant, while others aren't. Some show the...

    Started by weasel‎, 08-12-2014 04:13 PM
    • Replies: 0
    • Views: 95
    08-12-2014, 04:13 PM Go to last post
  18. Cox proportional hazard

    I am trying to understand how to interpret the change in the hazard function for a one unit change in a dummy predictor. I know for a continuous...

    Started by noetsi‎, 08-12-2014 11:06 AM
    • Replies: 3
    • Views: 92
    08-12-2014, 01:00 PM Go to last post
  19. Logistic regression, but no negative responses?

    So I am trying to model who is likely, from a list of addresses, to go to a store. I have lots of criteria about the people who have visited my...

    Started by bernstml19‎, 08-11-2014 06:42 PM
    binary data, logistic regression, regression analysis
    • Replies: 5
    • Views: 144
    08-12-2014, 10:38 AM Go to last post
  20. 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: 107
    08-12-2014, 05:13 AM Go to last post
  21. What is a "count" in regression

    It is often said that you should use Poisson regression with data that involves counts. But it seems to me that most of data in the social science is...

    Started by noetsi‎, 08-11-2014 05:04 PM
    • Replies: 9
    • Views: 175
    08-11-2014, 08:51 PM Go to last post
  22. PP-Plot

    I sometimes, when doing linear regression get a normal p-p-plot of regression standardized residual that looks like the one below. Can I still use...

    Started by trexter‎, 08-11-2014 06:09 AM
    • Replies: 2
    • Views: 133
    08-11-2014, 10:12 AM Go to last post
  23. Standard Error of Estimate

    I am reading a book called Applied Statistics with Excel by G. Keller. On p593 he wrote Standard Error of Estimate=(SSE/n-k-1)^2, and SSE = sum...

    Started by yma16‎, 08-09-2014 11:45 PM
    • Replies: 7
    • Views: 169
    08-10-2014, 08:42 AM Go to last post
  24. Consequences of wrongly applying dummy variables?

    I was just wondering if there were any consequences to applying dummy variables to independent variables which don't need it. For example, let's...

    Started by l_davies93‎, 08-10-2014 06:58 AM
    dummy-variable, regression
    • Replies: 0
    • Views: 88
    08-10-2014, 06:58 AM Go to last post
  25. Moderation Analysis through Process by Andrew Hayes and SPSS regression analysis

    Hello all, I need help analyzing some data for a moderation analysis. I have a continuous variable (predictor), Exhaustion, a continuous outcome,...

    Started by confooseddesi89‎, 08-09-2014 10:22 PM
    interaction, moderation, process, regression, significance
    • Replies: 0
    • Views: 109
    08-09-2014, 10:22 PM Go to last post
  26. Multiple Linear Regression: Coeffiecients are all insignificant - Can someone help?

    Hi together, I carried out a multiple linear Regression (OLS) and the results show me that all my explanatory variables (business model...

    Started by SimonNewbie‎, 08-09-2014 08:55 AM
    • Replies: 1
    • Views: 161
    08-09-2014, 11:18 AM Go to last post
  27. 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: 123
    08-09-2014, 08:41 AM Go to last post
  28. Post How to estimate quasi-elasticities from marginal effects of logistic regression?

    HI everyone, I am new to this forum. I need some help regarding logistic regression analysis. I am using logistic regression for my research. I...

    Started by abiduaf‎, 08-09-2014 07:11 AM
    logistic regression, quasi-elasticities, r-statisitcs
    • Replies: 0
    • Views: 60
    08-09-2014, 07:11 AM Go to last post
  29. cooks distance cutoff

    Hello, I urgently need to find out what is happening in regards to below: I am doing a huge number of simple linear regressions. For each...

    Started by Deccantraps‎, 08-07-2014 03:37 AM
    cooks distance, outlier detection
    • Replies: 9
    • Views: 199
    08-08-2014, 10:18 PM Go to last post
  30. interpretation nonlinear regression output

    I have run a linear regression. The independent variable is supposed to have a nonlinear relation with the dependent variable (both variables are...

    Started by rob1‎, 08-08-2014 01:49 PM
    • Replies: 0
    • Views: 109
    08-08-2014, 01:49 PM Go to last post
  31. Reasons for high lambda in ridge regression?

    I've seen a few papers where they use k-fold cross-validation (k=10) to find the optimal lambda. They end up with huge amounts such as 4000. This is...

    Started by l_davies93‎, 08-08-2014 01:23 PM
    • Replies: 0
    • Views: 81
    08-08-2014, 01:23 PM Go to last post
  32. Interpretation of restricted cubic splines' coefficients

    Hi all, I was wondering whether there is a "not-very-obscure" interpretation of the coefficients (in a regression analysis, like logistic...

    Started by Phaedrus‎, 08-08-2014 04:05 AM
    restricted cubic splines
    • Replies: 0
    • Views: 62
    08-08-2014, 04:05 AM Go to last post
  33. basic 3 year's observations forecasting - need for tips and feedback

    Hello everybody, I need advice about simple forecasting strategies and wondered if anyone here could kindly give me feedback. In each of the four...

    Started by parsec2011‎, 08-08-2014 01:46 AM
    • Replies: 0
    • Views: 83
    08-08-2014, 01:46 AM Go to last post
  34. Comparing regression slopes measured two times withinsubjets?

    Although I am not a statistics-newbee, I have no clue how to contrast the following situation against null-hypothesis, i.e. I don't know how to do...

    Started by statQuestions‎, 08-07-2014 02:09 PM
    • Replies: 3
    • Views: 153
    08-08-2014, 12:33 AM Go to last post
  35. Multiple regression then Sobel for mediation

    Hi, I am doing a mediation analysis. I first ran a multiple regression for IV (2 variables) to mediator. I want to do a Sobel test and use the...

    Started by PsychRachel‎, 08-07-2014 09:31 PM
    • Replies: 1
    • Views: 83
    08-07-2014, 09:33 PM Go to last post
  36. 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: 171
    08-07-2014, 02:17 PM Go to last post
  37. Question about standardizing in ridge regression

    Hey guys I found one or two papers which use ridge regression (for basketball data). I was always told to standardize my variables if I ran a ridge...

    Started by l_davies93‎, 08-07-2014 05:13 AM
    • Replies: 0
    • Views: 70
    08-07-2014, 05:13 AM Go to last post
  38. Upper Envelope on XY Data

    Hi There, I am working with a set of data where I get a scatter as shown in the attached image. When looking at the data, I can convince myself...

    Started by ntlegg‎, 08-05-2014 09:57 AM
    • Replies: 3
    • Views: 159
    08-06-2014, 07:13 AM Go to last post
  39. Interaction effect for quadratic relation

    Looking at the outcome of a linear regression (see also the file enclosed), there is an inverted U-shaped relation between ambidexterity and the...

    Started by rob1‎, 08-05-2014 10:13 AM
    • Replies: 2
    • Views: 131
    08-05-2014, 12:11 PM Go to last post
  40. Constant negative fitted values...am I missing something?

    Hello all, I'm attempting to fit a model where y variable is a variety of $/ha/year figures (all positive) ranging between 0.01 and 2520. The...

    Started by samuelle‎, 08-04-2014 07:54 AM
    glm, linear, negative values
    • Replies: 2
    • Views: 127
    08-05-2014, 04:34 AM Go to last post
  41. Testing multiple interaction variables in logistic regression

    Hi everyone, For a study that I'm currently conducting I want to know the effect of some of my variables on other variables, which I think should...

    Started by mjspijker‎, 08-03-2014 06:18 PM
    how to, interaction variables, logistic regression, model selection
    • Replies: 6
    • Views: 238
    08-04-2014, 07:11 PM Go to last post
  42. 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: 159
    08-01-2014, 07:58 PM Go to last post
  43. 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: 190
    08-01-2014, 05:35 PM Go to last post
  44. Smile Correlation between two non stationary time series

    Hey everyone, I'm trying to figure out if there is significant correlation between two non stationary time series (e.g. temperature on a a given...

    Started by s_chrodinger‎, 07-28-2014 05:51 PM
    correlation, monte carlo, non-stationary, regression analysis, time series
    • Replies: 9
    • Views: 247
    08-01-2014, 02:03 PM Go to last post
  45. Insignificant coefficients. Fixed effects model.

    Dear all, I have a panel data, and I estimate a regression using fixed-effects model (i.e. I use 'xtreg' command in Stata). The regression is as...

    Started by Man‎, 08-01-2014 01:20 PM
    • Replies: 0
    • Views: 93
    08-01-2014, 01:20 PM Go to last post
  46. RegressIt: free Excel add-in for regression analysis

    Regression Analysis forum members: I'd like to announce the release of a free Excel add-in for regression and multivariate data analysis which is...

    Started by RegressIt‎, 05-30-2014 03:59 AM
    • Replies: 1
    • Views: 288
    08-01-2014, 10:50 AM Go to last post
  47. Bayesian GLM with missing data

    Just while I'm on a roll with simple questions... I'm using MCMCregress {MCMCpack} to do a Bayesian regression in R. My dataset has a good chunk...

    Started by CowboyBear‎, 07-31-2014 06:57 PM
    • Replies: 3
    • Views: 157
    07-31-2014, 09:23 PM Go to last post
  48. Clarifying collinearity

    I am trying to run a regression model where the Y is concentration and predictors are stove type (e.g., stove1, stove 2, stove 3) and fuel type...

    Started by statshelp1234‎, 07-30-2014 05:21 PM
    collinearity, interpret, regression analysis
    • Replies: 3
    • Views: 127
    07-31-2014, 09:46 AM Go to last post
  49. bootstrap validation

    how can we do bootstrap validation in sas?

    Started by nancy10‎, 07-31-2014 08:14 AM
    • Replies: 0
    • Views: 85
    07-31-2014, 08:14 AM Go to last post
  50. Do i need to correct for family wise error when doing moderation and mediation?

    Hi, I've been analyzing data for moderating and mediating relationships and am wondering how necessary it is to correct for family wise error in...

    Started by LisaB‎, 07-30-2014 09:19 PM
    family wise error, mediation, moderation, type i error, type ii error
    • Replies: 0
    • Views: 98
    07-30-2014, 09:19 PM Go to last post
  51. Multivariate repeated measures, binary and continuous

    Hello all. I am working with a data set of multivariate repeated measurements. Specifically, subjects performed an exercise they were taught up to...

    Started by robsncoppers‎, 07-21-2014 03:16 AM
    binary, correlation, hrv, multivariate, regression
    • Replies: 3
    • Views: 182
    07-30-2014, 07:01 PM Go to last post
  52. Bizarre multicollinearity (inferred from VIF) in regression

    I'm really confused about why I have such high VIFs in a multiple regression I've run. My predictors are country (2 different countries, so -1 and...

    Started by psychmajor‎, 07-30-2014 05:39 AM
    multicollinearity, regression, vif
    • Replies: 2
    • Views: 128
    07-30-2014, 04:00 PM Go to last post
  53. Interpreting the regression RMSE when responses are measurements with known SD

    Hi all, I'm fitting a simple regression model (Y = a + bX) where my responses are measurements whose standard deviations, SD, are available....

    Started by fgg‎, 07-19-2014 09:04 PM
    • Replies: 8
    • Views: 383
    07-29-2014, 07:11 PM Go to last post
  54. Comparing coefficients in Logistic Regression

    Hello ! I would like to have guidance on what follows. I was fitting a Logistic Regression model, and I got the coefficients for the model's...

    Started by gianmarco‎, 07-29-2014 07:08 AM
    • Replies: 12
    • Views: 219
    07-29-2014, 06:44 PM Go to last post
  55. Logistic regression: trouble finding out which variables are significant

    Hi, I'm using logistic regression to analyse a dataset on managerial decision making. Managers have made decisions to fire 2 employees out of a...

    Started by mjspijker‎, 07-29-2014 07:36 AM
    interpreting results, logistic regression, significance
    • Replies: 7
    • Views: 200
    07-29-2014, 06:12 PM Go to last post
  56. How to integrate an interaction term into a fixed effect model?

    Hi, I have a balanced panel data set for t=2. I want to estimate a fixed effects model in the following way: Y= β(0) + β(1)*x + β(2)*z +...

    Started by JB81‎, 07-29-2014 06:21 AM
    • Replies: 0
    • Views: 57
    07-29-2014, 06:21 AM Go to last post
  57. Question about homoscedasticity (for a probably non-linear relation)

    I predict that independent variable X, has an U-shaped relation with dependent variable Y. I test this assumption using a regression analysis...

    Started by rob1‎, 07-28-2014 10:59 AM
    • Replies: 1
    • Views: 117
    07-28-2014, 11:04 AM Go to last post
  58. weight of evidence

    If WOE>0, what does it imply?

    Started by nancy10‎, 07-28-2014 08:11 AM
    • Replies: 0
    • Views: 83
    07-28-2014, 08:11 AM Go to last post
  59. "Averaging" linear trends = linear regression slopes ?

    Hello everyone, I was not able to find a solution for the following question, explaining it with a simple example: We have N=12 weather boxes...

    Started by statQuestions‎, 07-27-2014 04:02 PM
    • Replies: 1
    • Views: 111
    07-27-2014, 05:18 PM Go to last post
  60. correlation of trends?

    Hi, I have extracted trends from two time series (one correspond to some climate parameters, the other one to chemical composition of tree...

    Started by Valido‎, 07-23-2014 03:34 AM
    • Replies: 1
    • Views: 132
    07-27-2014, 04:11 PM Go to last post

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