Forum: Regression Analysis

Hello, I'm currently facing the following challange: I want to perform a regression analysis, but I am not sure, which model is appropriate. My...

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...

Hey everyone! I'm currently working on my Master's thesis and am slightly stuck in the analytical part. For my research, I am trying to figure out...

Dear all, I would like to ask the utilization of dummy variable in stata. Well, here is my model y=beta1 lnx1(1,x1)+beta2 nox1+beta3 lnx2...

Hi Everybody, I am trying to find the effect of introducing a new variable. That is, I want to run two regressions: y = b0 + b1x1 and y...

Hi All, I asked this on Stack Exchange, but it seems no-one there knows the answer. I wonder if anyone on talkstats can shed some light on it. For...

Hi All, Assuming Congo gets foreign aid from Denmark, Sweden, UK, US and Germany. How do I go about getting the effect of Denmark's aid on Congo....

As general question, Are 70 observations sufficient to design a reliable decision rule for discriminating between two groups, with a Fisher linear...

Hi! I have a problem doing my course assignment(with SPSS): I can't find a way to improve the overall hit ratio and Nagelkerke levels even...

Hi, I'm running a panel poisson regression with fixed effects in Stata. The result in Stata doesn't display a constant. Normally I use standard...

I am a finance student, but my real love is statistics... so I am trying to spend this summer working with little projects to learn as much as I...

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

Dear All, I would like to conduct a regression analysis on a data set which includes dicrete inputs (Xs). The purpose is to have a regression...

HI Afer a lot of reading I am still confused what is the difference between a linear and non linear mixed model. I would really appreciate if some...

All, I have a very peculiar problem that I am trying to solve. What I mean is, the following is an explanation of the current solution that has...

Hi, I'm new to this forum and found a late 2011 discussion of the relevance of regression analysis of rank outcome interesting. I have used...

Dear all, I assessed the utility of the biomarkers to discriminate between two diseases states (infection or no infection) using ROC analysis. I...

Hi all I am working on a research project for a basic stats course. I'm in the planning phase and could use some pointers to make sure I'm going...

Say you have a linear and quadratic term. Is it possible for the linear term to be not signficant, and the quadratic term be signficant? If so, what...

Helo I am faced with a problem which looks to be a clear case of logistic regression. A dependent variable(binary in nature) needs to be...

Hi, I hope someone can help me. I need to run multiple regression with 2 IVs and 1 DV and include a control variables. The control variable is...

I have a gaussian bell shaped chromatographic peak in which my 3 closely related impurities are getting separated (In the same peak). There is a...

Hi. I have limited experience in statistics. I've tried to read up on textbooks and such but I suspect i'm missing something that someone more...

Dear all, first of all Im new here, just registered. However I read the rules and couldnt really find something which fits my problems since they...

Hi I have a dependent variable return on assets (%) and a independent variable which is ln(GNI/cap) thus a log transformed variable to the base...

I've run a logit regression to estimate the probability of attending high school. I've done this for many years. The thing is that some coefficients...

Hi. I’m taking my first steps on binomial logistic regression and I was hoping you could help me with some doubts I’m having. My model has a...

Hey all, I have a question about time dummies. I'm running a regression with country-years. For each country I have observations for the years...

i'm sorry if this is an incredibly stupid question, this is something i've never done before. i'm doing a study which involves asking two groups the...

Hi all, I stil have a problem with the regression regarding my thesis. For one variable, The relative net postions of speculators on the future...

Hello all, I have a pretty general question: Which nonlinear regression is more reliable when you have a small sample of 50 - 70 size one...

Hey guys, can some one explain to me in which situation it is best to use one of these three regressions? And what tests would I need to do in SPSS...

Hi, Can someone please help me with this one? I'm trying to run the next multivariate regression: R_t = β_0 + B*F_t + β_L*L_t + e_t where...

I have a number of measurements of the initial reaction rate of x reactions. Assuming linearity until t = y gives me x linear regressions with...

Hi, First off, I’ve never taken statistics (I have taken a few calculus classes in college, so some of the notation I am coming across is not too...

Hi Guys, i want to estimate the following model with 2 equations simultaneous, but im not quite sure if im on the right track r = a0 +...

Dear stats experts, I have been struggling with a problem the whole day and only found a partial solution so far, which I think is not sufficient...

Hi everybody, I have the following question: I have two continuous variables (assertiveness & team-identification). I have measured...

Hello there, I have conducted a hierarchical regression with two steps. Statistical significance resulted form the first step, as the second...

Hey all, So far I mostly worked with quantitative data, but now I have to do an analysis on effects alcohol consumption. Now I got a questionnaire...

I'd like to know how several variables are related to the number of small-scale slaughterhouses at the county level throughout the US. There are...

Have to choose the best fit between different model. model.list <- list (model1 = nls (y ~ (a * exp (b * x)), data = dat, weights = n, start = list...

Hi, I have a set of OLS-fixed effects models comprising continuous and dummy variables, with the latter used as control parameters. My models aim...

what sort of anaylsis should I use if I am trying to find the relationship between earthworm densities and soil properties (pH and organic matter...

I simplified it a bit so I can get my question across easier Dep variable: Happy(0) or Sad(1) Independent variable: Age Independent V: Sent to...

Hi there. I'm running a model with a 3 level interaction which is significant. I included all the two levels interactions which make the basis for...

I need to fit a curve (regression and non-parametric smoothing) a set of points. These points represent the prevalence of disease by age. However, as...

Hi, I am using PCA to avoid multicollinearity problems and then I want to use the first 2 PCs in linear regression. The 1st PC contains 60% of...

Hi all, I wonder whether some of you have some valuable input on which method I should use in my research. The main idea is that I decompose a...

Hi, I did some observations about chickens in a free range area, which was divided in sections. The response variable is: 1 if there were chickens...

I have series of (metric) lab variables measured in a group of patients, with once daily measurements over 20 days, and I would like to investigate...

Dear all, I'm working on a multi factors model analysis to come up with a formula to estimate market size of some countries based on several...