I have a simple question regarding formulating research null and alternative hypotheses in a simple econometric regression model.
In my research Hypothesis, I expect X to negatively affect Y (from intuition as well as empirical literature).
So, in order to state the null and alternative hypotheses, which form is accurate:
H0: X has no impact on Y.
H1: X has an impact on Y.
H0: X has no Impact on Y
H1: X has a negative impact on Y.
And let's say X was found significantly affecting Y, Can I say the null is rejected, but the alternative in case (in case 2), or my research hypothesis is not accepted?!
THANK YOU LOADS!! :D