regression equation

Hello everybody! Can someone explain me how to consider the terms " 1(Xi > 0) " and the error term €i in the expression below ? This relationship comes from the article "Dealing with the log of zero in regression models" Dealing with the Log of Zero in Regression Models by Christophe...

I'm trying to estimate the value of an apartment, by doing a regression through similar apartments. The regression model looks now like this lmRob(price ~ ., data = data) , but this is clearly wrong. My problem is modelling variables which are depending on each other. For example floor...

Along with this post, I have attached a screenshot of my assignment and I am confused about the validity of regressions equations. I plotted linear and exponential trend lines and got the regression equations. When I tried to verify the equations by substituting x-values in those equations, I...

I came across this post http://stackoverflow.com/a/3701896/3007275 which has some information about forward stepwise regression. However, I don't quite understand the solution. I was wondering if someone is able to explain what the code is doing?:)

Hello! I have a question about how to compare regression equations and regression coefficients. I have data set A with n data points, and two possible predictor data sets, X and Y, that cannot be combined in one equation, i.e., X is one way of explaining A, and Y is a different way. My...

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 there is controllability of weight (IV1) and two representing 'values for thinness' (IV2 and IV3 respectively) predicting levels of prejudice (DV)...

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 the size of that sector (represented by spending power). There are other control variable. However, I have six (6) sectors and 52 countries. This...

Hi, Do you know what (preferrably free/ free trial) software allows u to manually enter a desired regression equation? (and then calculate R-squared and other statistics based on it?) I already have the equation i wish to investigate. Every software i've come across doesn't seem to allow...

Hi everyone: I am a bit new to logistic regression and I could use some advice. I am trying to discover the influence of various variables on voting turnout in an election study. Although I have one problem: The household income variable is coded as interval variable with 16 categories, each...

Im little confused with the following. there are 12 patients, each is assigned assigned an index I when first administered depending on the severity of their symptoms. Each then administered a drug and 30 days later they are given another index F which will hopefully be lower than I if they...

I have created a prognostic model using logistic regression. It predicts diabetes based on 6 independent variables (age, sex BMI, etc). I understand that Exp(Xi) = Odds Ratio of each (risk) factor in the model. I also understand that the probability of diabetes = exp(bo+ bi Xi) /((exp(bo +...

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 calculated and got two regression equations which i want to verify whether they are correct or not by applying some reverse mechanisms I want to...