If you are using the scientific method to test whether there is a God, then that would mean that the absence of one would be your null hypothesis. You can't prove a null hypothesis. To truly understand the scientifi method, one would understand that you can never TRULY prove, trough science, that there is no God. This whole concept is not only silly, but, ironically, unscientific. It really boils down to one thing, as St. Agustine said: Faith. You either believe there is a god, or not. If you do, it's cool, and if you don't, it's cool too. But, trying to disprove human religious beliefs using "science" is really ridiculous.
One never "proves" a null hypothesis. When a hypothesis is falsified, one then accepts the null hypothesis. For example, if the hypothesis is that a god exists, and evidence argues against this existence, the null hypothesis is accepted (atheism). The burden of proof is on the person who posits that something exists. Until supporting evidence is found, one has no reason to worship a god unless one is burdened with the gift of faith.