How do i generate and test hypotheses in panel data regression?

#1
I am in the process of generating hypotheses for a random effect panel data regression model.
I want to test if the coefficient to the independent variable is higher than 0, or at least different from 0, i.e. if the dependent variable is correlated and maybe even positively correlated with the independent variable.
How should these hypotheses look? Is a T-test or a F-test applicable to test these hypotheses? if so, which one should be adopted?