This isn't very scientific.
1) You have no control, where you test with a completely random stranger as a baseline.
2) you only have a sample size of 4, with 1 trial each. That's got plenty of room for error. What if the one measurement you took was off? You would never know as you have no other measurements from that source to compare to.
3) There's no stated thesis, or a properly formatted report. From this set of images I can't even tell what exactly is it you were testing for, what the underlying question was, and what the result is supposed to mean.
1) You have no control, where you test with a completely random stranger as a baseline.
2) you only have a sample size of 4, with 1 trial each. That's got plenty of room for error. What if the one measurement you took was off? You would never know as you have no other measurements from that source to compare to.
3) There's no stated thesis, or a properly formatted report. From this set of images I can't even tell what exactly is it you were testing for, what the underlying question was, and what the result is supposed to mean.