I have a follow-up question to this threat:
Test a significant difference between two slope values
There is a formula introduced to calculate a z-score when testing for a significant difference between two slope values. I have succesfully applied the formula (thanks to the user Marloes).
Now my question: When I compare the slope values from more than two regressions, let's say three, and I use the formula three times, do I have to adjust the values because of alpha error accumulation?
I guess the answer should be "yes" because the basic problem of multiple comparisons in one set of data stays the same. But as I am not 100% sure, I'd be glad for some opinions.
Kind regards & thanks in advance Seb
