The purpose of the experiment is to TEST the hypothesis.
If the results of the experiment seem to agree with the
hypotheses, then you're on your way ... there's a good
chance that the hypothesis is correct.
If the results of the experiment seem to NOT agree with
the hypothesis, then
there's something wrong somewhere,
and you have more work to do. You have to re-examine
the hypothesis, review the setup of the experiment, and
review the results, and also do some more experiments
if you have the time and can get the money.