I have a question about data pooling and regression analysis, i have tried to read some basic statistic book, but still not answering my question.

Pls see my attachment file.

1. What is the basic principe performed on calculation step 1,2,3 and 4 like shown at page 2.

2. How do i can perform calculation like shown at step 2 page 2.

3. How do i can perform calculation for standard condition data model ( model 1,2,3,4 )

4. How do i can perform calculation for statistical analysis like shown at page 3 ( table of statistical analysis )

Thanks

mchodu