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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Excel and StatPlus to do Multiple Regression

    Hi all--I would be grateful for any help with this! I am doing my statistics research project on whether or not there is a correlation b/w where...

    Started by Belle‎, 11-29-2012 05:26 PM
    • Replies: 4
    • Views: 9,856
    11-30-2012, 12:39 PM Go to last post
  2. Question Urgent Help Required.....

    Dear all, i am doing a research these days. but i am facing a difficulty in statistics analysis. Actually i have measured a quantity "A" in the...

    Started by imtii‎, 11-30-2012 08:59 AM
    • Replies: 10
    • Views: 1,985
    11-30-2012, 09:37 AM Go to last post
  3. multiple regression categorical variable and different slopes

    Hi All, Im trying to run multiple regression with 2 independent variables and one categorical variable (two levels: male vs. female). The...

    Started by mcdomell‎, 11-28-2012 08:50 AM
    separate slopes
    • Replies: 4
    • Views: 2,066
    11-30-2012, 05:13 AM Go to last post
  4. testing interaction between two independent variables

    To test for interaction between two independent variables in a linear multiple regression model (e.g. 'A' and 'B' as independent variables; 'C' as...

    Started by lingdeer‎, 11-29-2012 04:40 PM
    • Replies: 0
    • Views: 3,920
    11-29-2012, 04:40 PM Go to last post
  5. Dummy Coding of Variable and interpretation

    Discussion One of my IV in my regression analysis is religion 1=Catholic 2=Jewish 3=Protestant 4=muslim 5=other 6=none I recoded religion as...

    Started by Dee6619‎, 11-28-2012 04:18 PM
    • Replies: 8
    • Views: 2,775
    11-29-2012, 01:43 AM Go to last post
  6. Pos. or Neg. Correlation with Error Term?

    in IV regression, how can I tell if an endogenous variable (Pi) is positively or negatively correlated with the error term? The only information I...

    Started by dreed05‎, 11-28-2012 09:34 PM
    • Replies: 0
    • Views: 1,986
    11-28-2012, 09:34 PM Go to last post
  7. Tobit Model -Not sure whether DV is appropriate

    Hi, I have a large panel of households and am wanting to test the impact of demographic and socioeconomic factors on the diversification of asset...

    Started by Westy‎, 11-27-2012 09:00 PM
    • Replies: 2
    • Views: 1,258
    11-28-2012, 05:59 PM Go to last post
  8. Multiple regression Analysis-How many regression analyses do I need to run?

    In the present study we examined whether religious affiliation, education level, and negative affect were uniquely associated with the core beliefs...

    Started by Dee6619‎, 11-28-2012 12:19 PM
    • Replies: 3
    • Views: 1,512
    11-28-2012, 04:07 PM Go to last post
  9. SPSS and regression - possible dummy coding?

    I am struggling to run an analysis of this data. I have 3 levels of teaching methods as one independent variable, I also have a dependent outcome of...

    Started by apperception‎, 11-28-2012 01:42 AM
    • Replies: 1
    • Views: 2,233
    11-28-2012, 02:45 AM Go to last post
  10. Unhappy Combining models into single one

    Yi = B0 + (B1X1,i) + (B2X2,i) + ui Yi = A1 + (A2X1,i) + (A3X2,i) + ui How to formulate these two models as one single linear model using the...

    Started by rayshonali90‎, 11-26-2012 10:17 AM
    multivariate analysis, ols
    • Replies: 1
    • Views: 1,366
    11-26-2012, 11:05 AM Go to last post
  11. how to interpret the interaction term in panel data?

    My econometric model include an interaction term. i have some doubts in my mind. can we say that the interaction term is only the multiplication of...

    Started by abdulhannan‎, 11-22-2012 08:00 AM
    • Replies: 0
    • Views: 2,292
    11-22-2012, 08:00 AM Go to last post
  12. How would I find the specific impact of two variables for an observer response?

    I have collected some data (on an 11 point scale from -5 through 0 to +5) of observer judgements of the emotion presented on the central face in a...

    Started by Moirae‎, 11-21-2012 02:13 PM
    regression
    • Replies: 0
    • Views: 1,520
    11-21-2012, 02:13 PM Go to last post
  13. 22 enough for multiple regression?

    Hello guys, i am doing a thesis on a given industry having only 22 enterprises. As the population size is small i have decided to go for census. But...

    Started by gett_u@yahoo.com‎, 11-16-2012 01:40 AM
    • Replies: 5
    • Views: 1,913
    11-20-2012, 02:58 AM Go to last post
  14. Question Method agreement for ordinal and continuous outcomes?

    Hi, so, I came to the Regression Analysis forum because my first thought was to potentially do some sort of ICC. I am consulting on a project...

    Started by SabbyATL‎, 11-19-2012 12:28 PM
    • Replies: 2
    • Views: 2,598
    11-19-2012, 10:04 PM Go to last post
  15. I need help with probit/logit regression

    Hi. Here is my situation. I ran an discrete choice experiment (orthoplan - 16 cards) with 2 4-level variables and 3 2-leves variables: 1 (days) -...

    Started by RealBG‎, 11-19-2012 03:38 AM
    • Replies: 0
    • Views: 1,327
    11-19-2012, 03:38 AM Go to last post
  16. Multivariate Regression vs Canonical Correlation

    I know the difference between correlation and regression, however, I'm a little confused with the difference between Canonical Correlation (CCR) and...

    Started by jonathaned55‎, 11-12-2012 11:09 PM
    canonical correlation, multivariate regression
    • Replies: 1
    • Views: 4,221
    11-17-2012, 06:55 PM Go to last post
  17. 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
  18. How to interpret parameter estimates

    Hi, I have some output here from R, it contains the parameter estimates, the standard deviation of these estimates, the z value, the...

    Started by gino492‎, 11-15-2012 05:54 PM
    • Replies: 1
    • Views: 3,550
    11-15-2012, 05:58 PM Go to last post
  19. Linear regression - Controlling the pre-measure of my response variable

    Hello everyone! :wave: Context: I want to analyze the change in anxiety scores (STAI) in a group of patients undergoing surgery and relate it to...

    Started by Mase‎, 11-13-2012 03:33 AM
    • Replies: 5
    • Views: 3,150
    11-14-2012, 11:53 AM Go to last post
  20. Multiplicative semiparametric regression

    Hello, I have problems concerning a semiparametric regression. The relationship between the dependent variable Y and the independent variable X...

    Started by Jorge1990‎, 11-14-2012 04:37 AM
    • Replies: 0
    • Views: 1,394
    11-14-2012, 04:37 AM Go to last post
  21. Would Seemingly Unrelated Regression apply here?

    I am trying to model changes in employee behavior along two different dimensions, y1 and y2, as a function of several explanatory variables, X (e.g.,...

    Started by mdv6‎, 11-13-2012 05:56 PM
    • Replies: 0
    • Views: 1,096
    11-13-2012, 05:56 PM Go to last post
  22. R squared equals 1 in Stepwise regression analysis

    Hi I have carried out stepwise regression analysis using SPSS and the resulting r squared equals 1. I wonder if this R squared is acceptable or...

    Started by Rana‎, 11-13-2012 06:24 AM
    • Replies: 1
    • Views: 3,720
    11-13-2012, 09:25 AM Go to last post
  23. Multiple Regression - Multicollinearity

    Hi I'd really appreciate it if anyone could help me with this. I'm doing statistics coursework as part of a Psychology degree and have come across...

    Started by James73‎, 11-10-2012 07:11 PM
    multicollinearity, multiple regression
    • Replies: 5
    • Views: 1,914
    11-12-2012, 03:58 AM Go to last post
  24. Are these models nested?

    I have three logistic regression models. Model 1 is the reference model with covariates GA + BW. Model 2 is a quadratic model with GA + BW +...

    Started by SiBorg‎, 11-11-2012 06:22 AM
    • Replies: 9
    • Views: 3,764
    11-11-2012, 04:37 PM Go to last post
  25. SPSS- logistic regression, three patient groups, ROC curve

    Hi all, I have three groups of patients, and 6 variables for each patient. I want to combine these variables and make a multiclass ROC curve, in...

    Started by PaulineB‎, 11-09-2012 09:21 AM
    • Replies: 4
    • Views: 10,901
    11-11-2012, 09:54 AM Go to last post
  26. Testing for Panel Cross-Sectional Dependence

    Hi, I am running a panel data regression in Stata, with unbalanced data over time and countries. I want to test if there is panel cross-sectional...

    Started by Olleolle‎, 11-09-2012 03:51 AM
    • Replies: 0
    • Views: 2,935
    11-09-2012, 03:51 AM Go to last post
  27. Skewed dependent variable in logistic regression-how to handle

    I am conducting research on juvenile firesetting with a child's self report of firesetting as my dependent variable.(0= never played with or set...

    Started by chbowling‎, 11-07-2012 08:48 PM
    skewness regression
    • Replies: 4
    • Views: 6,651
    11-08-2012, 07:18 PM Go to last post
  28. Question of independence of one variable in a logistic regression model

    I have been asked to analysis a logistic regression looking for potential predictors of precepting excellence based on collegiate level student...

    Started by waubain‎, 11-08-2012 08:49 AM
    • Replies: 0
    • Views: 896
    11-08-2012, 08:49 AM Go to last post
  29. statistical test between two correlation matrix

    Dear all, Recently, I have trouble with the following errors, I'm not sure how i could figure it out after my google again and again,Hope someone...

    Started by scyxr‎, 11-02-2012 04:10 PM
    • Replies: 2
    • Views: 1,845
    11-06-2012, 08:52 PM Go to last post
  30. interpret logit/logistic results

    Dear all, For some reason i am unable to fully understand the logit and logistic regression. I am especially in doubt how i should interpret my...

    Started by oseroser‎, 11-01-2012 06:46 AM
    • Replies: 1
    • Views: 1,702
    11-03-2012, 10:16 AM Go to last post
  31. Question [Book suggestion] Analysis strategy

    So, I feel like what I've had in mind of statistics is sort of fragmented, but have trouble putting pieces together in a coherent and systematic...

    Started by non-sleeper‎, 11-01-2012 02:53 PM
    • Replies: 0
    • Views: 1,127
    11-01-2012, 02:53 PM Go to last post
  32. Zero-inflated continuous independent variables

    Are there ways of handling zero-inflated continuous independent variables?

    Started by doh_ramey‎, 11-01-2012 08:22 AM
    • Replies: 4
    • Views: 6,073
    11-01-2012, 10:44 AM Go to last post
  33. Calculate Intercept for multiple regression

    I have been using a simple Logistic Regression method with Log odds and it works very well for me This is an example X yes no total Prob Odds Log...

    Started by aivoryuk‎, 10-31-2012 09:21 AM
    • Replies: 0
    • Views: 2,543
    10-31-2012, 09:21 AM Go to last post
  34. Division of two IV's in a logistic regression

    Hello, I am conducting a logistic regression with two continuous IV's (x1 and x2). I am also interested to analyze the relative impact of both...

    Started by Jonas‎, 10-31-2012 05:29 AM
    • Replies: 0
    • Views: 922
    10-31-2012, 05:29 AM Go to last post
  35. Covariance and Correlation for Regression Model

    I've been looking over some regression models lately and I came across one which, although similar, differs from the "standard" simple linear model....

    Started by Rupert‎, 10-30-2012 08:32 PM
    correlation, covariance, regression
    • Replies: 0
    • Views: 1,282
    10-30-2012, 08:32 PM Go to last post
  36. Question Lack-of-fit for repeated measures

    Greetings, I'm looking to run a lack-of-fit test on repeated measures data. To summarize my problem, I want to test whether an eight-factor...

    Started by jrs1980‎, 10-30-2012 10:37 AM
    lack-of-fit, mixed effects, regresion, repeated measures, variance decomposition
    • Replies: 0
    • Views: 1,193
    10-30-2012, 10:37 AM Go to last post
  37. Binary Logistic Regression (No Reference Category)?

    I am currently working on my graduate thesis and was instructed to do a logistic regression by my adviser, but I'm a bit confused with the SPSS...

    Started by maku‎, 10-29-2012 05:37 AM
    • Replies: 1
    • Views: 1,631
    10-29-2012, 07:45 AM Go to last post
  38. How to explain the cause of interaction variable?

    Hello, I am currently doing statistical analysis for a project, and I am stuck with the following problem. If any of you could help me with this I...

    Started by Eetupelle‎, 10-27-2012 04:07 PM
    • Replies: 0
    • Views: 1,189
    10-27-2012, 04:07 PM Go to last post
  39. Cointegration

    Hi guys, 1) I have the time series model y_t = a + bx_t + e_t where y_t and x_t are I(1), and I've been asked to run an ADF test over e_t to...

    Started by derksheng‎, 10-27-2012 05:11 AM
    • Replies: 1
    • Views: 1,344
    10-27-2012, 01:00 PM Go to last post
  40. The frequency distribution of residuals

    The residual distribution should be normal with mean zero if possible. However, I have a situation where after nonlinear least squares, I get a...

    Started by houstonlife‎, 10-25-2012 09:05 AM
    • Replies: 1
    • Views: 1,803
    10-26-2012, 06:52 AM Go to last post
  41. Multilevel linear growth modelling: an appropriate method?

    Hi, I'm just wondering if I am following the right line of thought for my analysis. I've got longitudinal data (4 years) and a single outcome...

    Started by cls1‎, 10-26-2012 04:56 AM
    • Replies: 0
    • Views: 890
    10-26-2012, 04:56 AM Go to last post
  42. multiple linear regression

    Hi there, I want to find the effect of explanatory variables (factors) such age, job, sex on questionnaires' factors. My question is can I use...

    Started by katerina‎, 10-25-2012 08:38 AM
    • Replies: 0
    • Views: 1,100
    10-25-2012, 08:38 AM Go to last post
  43. how to regress ownership concentration on country dummies: SPSS

    Help, I've been reading through a journal but I do not understand what the author is referring to. In the journal, he writes that "When I regress...

    Started by statsdoof‎, 10-24-2012 10:57 PM
    • Replies: 0
    • Views: 897
    10-24-2012, 10:57 PM Go to last post
  44. Help Newbie With Regression

    I'm very new to regression and have a ton of data I want to analyse that I think would benefit from regression but I'm not sure how to apply it. I...

    Started by theopenalgorithm‎, 10-22-2012 07:08 PM
    • Replies: 3
    • Views: 1,247
    10-24-2012, 02:08 PM Go to last post
  45. Simple Linear Regression Coefficient Estimation Across n Samples

    Hello, I was hoping that somebody could provide some assistance on the following topic: Consider a random variable Y with mean: y = \alpha +...

    Started by Rupert‎, 10-24-2012 07:34 AM
    simple linear regression
    • Replies: 3
    • Views: 1,464
    10-24-2012, 09:18 AM Go to last post
  46. Bayes Rule to summarize time series cumulative Logistic Regression output

    Hello, I have been struggling to find a definitive answer to what should be a very simple question. I have a logistic regression model that...

    Started by dwienke‎, 10-23-2012 10:49 AM
    • Replies: 0
    • Views: 965
    10-23-2012, 10:49 AM Go to last post
  47. Does OLS have to be properly specified before GWR

    Hi, I'm having some difficulties with properly specifying an OLS regression but want to use GWR as its more appropriate for my study. My issue is,...

    Started by lau86‎, 10-23-2012 09:43 AM
    • Replies: 0
    • Views: 935
    10-23-2012, 09:43 AM Go to last post
  48. Constant Elasticity Model

    I was wondering if anyone could please try to help me understand where I'm going wrong with the following logic: I have been trying to look at a...

    Started by Matpyris‎, 10-18-2012 09:59 AM
    constant elasticity, interpreting regression, power regression
    • Replies: 1
    • Views: 7,379
    10-23-2012, 09:31 AM Go to last post
  49. Comparing coefficients in Seemingly Unrelated Regressions

    Hello I have a panel data set and have estimated two regression models with the same set of independent variables but different response variable. I...

    Started by niamyara‎, 10-22-2012 12:28 PM
    comparing coefficients
    • Replies: 0
    • Views: 2,500
    10-22-2012, 12:28 PM Go to last post
  50. Linear regression, predictor contains same components as depedent variable

    I came across this model: y(t) = f (y(t-1), X) where y ia a centered 3-month average, for example, for aug'12, y=average of Jul, Aug and Sep...

    Started by chasegary‎, 10-21-2012 12:11 PM
    regression analysis, time series analysis
    • Replies: 1
    • Views: 1,018
    10-22-2012, 08:01 AM Go to last post
  51. Bivariate Linear Regression - Assumptions not met

    Hi everyone! :wave: Context. I want to analyze if the age (edat) of my participants is related to their score in a depression scale (HADSD). As both...

    Started by Mase‎, 10-19-2012 04:56 AM
    • Replies: 2
    • Views: 3,975
    10-22-2012, 05:06 AM Go to last post
  52. Multiple Regression

    I am trying to figure out how to determine how long someone has been part of a study. The information provided is as follows: Supplements ...

    Started by DWills‎, 10-21-2012 12:35 PM
    • Replies: 1
    • Views: 1,085
    10-22-2012, 01:59 AM Go to last post
  53. Correcting lack of fit

    I have a very simple data set with a single regressor that has all negative values. The data set provides no context, only values. When testing...

    Started by zicke01‎, 10-20-2012 03:18 PM
    • Replies: 4
    • Views: 2,055
    10-21-2012, 02:01 PM Go to last post
  54. Fama MacBeth regression + different fiscal year end

    dear all, t's z 1st time that i make research and i'm new to state so i had several questions, can i apply fama macbeth regression for a short time...

    Started by gihan‎, 10-21-2012 12:48 PM
    • Replies: 0
    • Views: 2,497
    10-21-2012, 12:48 PM Go to last post
  55. Additive - Multiplicative and Non Linear Regression

    Hello, Let us say that we have a dependent binary variable expressing the occurence and non occurence of an event. We also have a number of...

    Started by zarasandreas‎, 10-21-2012 12:20 PM
    regression
    • Replies: 0
    • Views: 2,463
    10-21-2012, 12:20 PM Go to last post
  56. Parzen Window

    Hello, Is there any newer or better method (instead of Parzen) for estimating a probability density function from a set of data? for example can...

    Started by Fred_a‎, 10-21-2012 10:45 AM
    copula, parzen, pdf
    • Replies: 2
    • Views: 1,955
    10-21-2012, 12:04 PM Go to last post
  57. Measuring population variables

    Hello forum-ers, Hope everyone is well. Just have a quick question about a regression model that I am working on that is looking at...

    Started by derek.canada‎, 10-21-2012 11:49 AM
    • Replies: 0
    • Views: 1,210
    10-21-2012, 11:49 AM Go to last post
  58. heteroskedasticity and non normal residuals in linear regression - please help!

    Dear All I'm struggling with a linear model. My dependent variable is change in central anterior chamber depth of the eye with time. ...

    Started by SiBorg‎, 09-26-2012 01:23 PM
    3 Pages
    1 2 3
    • Replies: 35
    • Views: 9,089
    10-21-2012, 11:36 AM Go to last post
  59. Odds Ratio Interpretation in Logistic Regression when input is Log-Transformed

    Hello, Lets us have a binary dependent variable with 1 as the event and 0 as the non-event. We model the probability of event. The independent...

    Started by zarasandreas‎, 10-21-2012 08:59 AM
    logistic regression, normality
    • Replies: 0
    • Views: 3,705
    10-21-2012, 08:59 AM Go to last post
  60. Regression question

    I have data from 20 groups of 5 people (assigned randomly) making binary decisions within the same group for 20 times. Each period, within each group...

    Started by 312a‎, 10-19-2012 08:42 PM
    • Replies: 0
    • Views: 1,293
    10-19-2012, 08:42 PM Go to last post

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