Paranormal activity going on

Yesterday when I went to bed, my computer turned off by itself. How do I know, the volume was on high when it went off. Then my daughter asked me if I felt the bed moving, later saying she was just kidding. Later that night, I felt the bed shaking. Yes, it's on wheels. Then, my nooks chimes went off, hours later my alarm clock.went off.on my cell.phone. And the thing about it is that the alarm does not go off everyday. I did not.touch the nook for it to go off. And now tonight, when I turn off my TV,it turns itself back on. Now what I have noticed that is that all of the incidences are electrical, and that none of this happens when my daughter's, family, and friends are around. What could that mean?