I think Science can explain some things certainly.
I think that you have to consider if you know it's an 1920 home, whether fear makes you believe there are ghosts.
Then consider you are not the only one in the house, or that visits the house that hears the exact same noises.
There are no things being thrown around the place
So what is there to fear?
I do personally believe in after life, that's my personal opinion. I have experienced simular things throughout my life to "not" not believe in it.
The non believes will say you are crazy, the believes will say it's normal and common.
And, they will say, there are no things being thrown around the place, so what is there to fear:)