Incorrect: The experiment was conducted between 3:30 to 6:30 p.m.
Correct: The experiment was conducted between 3:30 and 6:30 p.m.
Correct: The experiment was conducted from 3:30 to 6:30 p.m.
Incorrect: The experiment was conducted between 3:30 to 6:30 p.m.
Correct: The experiment was conducted between 3:30 and 6:30 p.m.
Correct: The experiment was conducted from 3:30 to 6:30 p.m.