16 hours ago, possum1931 said:

 

Whys that?

Picture shows a mechanical balance scale. There is nothing to go wrong. Always totally accurate. 

4 hours ago, bazza73 said:

Wrong. Your procedure is determining the precision of each instrument, not the accuracy.

Actually it's not doing either since I had him add all 20 "scores" and divide them by 20, so it would just be a  fairly meaningless combined average. Obviously the objective of the exercise was to keep him occupied ... sort of like you do with annoying children when you tell them to count all the pigeons in the park.

About as reliable as the ATMs.

30 minutes ago, Suradit69 said:

Actually it's not doing either since I had him add all 20 "scores" and divide them by 20, so it would just be a  fairly meaningless combined average. Obviously the objective of the exercise was to keep him occupied ... sort of like you do with annoying children when you tell them to count all the pigeons in the park.

Correct. I took it to mean you were using the data to calculate the standard deviation.

8 hours ago, bbi1 said:

Oh no the horror  700grams difference between the machines! Are you sure you stood on exactly the same spot on the machines? If you stand on a different spot, that could affect the results. Alternatively, did you drink or eat anything or poop or piss or sweat during the time between those two weigh-ins?

No. the machines are only a 2 min bike ride apart.

700gm difference on 78kg is less than 1% error... pretty good IMO.

 

 

Ummmmm..............telling you a lie if you're overweight?