# Recent content by renato25

1. ### Interpretation of interaction terms in a multiple linear regression

I try to improve my statistical knowledge and right now I am working on a regression that contains interaction terms. I am currently investigating the effects of different variables (a1, a2 etc.) on the quantity of chairs sold in a transaction (dependent variable). To see if effects are...
2. ### Help to formally write down a linear regression

Thank you Dason. You are right. Of course there is a ß1 for each T included. I looked through some papers and some of them just write it with an apostrophe like this: Yi = ß0 + a' * T'i + z' * X'i + o' * d'i + ei So a' is a vector for the different parameters that are estimated. The same holds...
3. ### Help to formally write down a linear regression

Thank you for your reply hlsmith. I added an apostrophe to indicate that the T, X and d are dummy variables. So my new equation is: Yi = ß0 + ß1 * T'i + ß2 * X'i + ß3 * d'i + ei Alternatively I can write dti, where t is the subscript for the specific day and i the subscript for the specific...
4. ### Help to formally write down a linear regression

Hello altogether, i am currently analysing a dataset of 10,000 transactions. I am analysing the effect of different advertising campaings on the quantity of chairs by using multiple linear regression model with zip code and day dummies. I am interested in formally writing the regression model...
5. ### Chi - Square Test for test of independence of variables in different treatment groups

Hello together, I have a question concerning my bachelor thesis. It is the first time I am actually doing statistical analysis on my own and so recommendations are very welcome. I work with a huge dataset of N=30000 with 10 randomized treatments group (variable „Treatment“ going from 0 to 9) and...