The Drake equation can determine if there is intelligent life in the universe, but it depends on how you complete the formula:
N = R x Fp x Ne x Fl x Fi x Fc x L
N = Number of civilizations we can communicate with
R = Number of stars in the galaxy
Fp = % of Stars with planets
Ne = # of life supporting planets per star
Fl = % of life supporting planets that actually develop life
Fi = % of developed life that is actually intelligent
Fc = % of intelligent life that actually transmits radio or light signals
L = How long signals are transmitted into space
Will we talk to aliens in our life time?