How does multiplying several measurements affect precision?

1 Answer
Jul 4, 2018

see below


if you make only a measurement you can't say nothing about the precision with which you know its value.
the precision is the capacity by an instrument or by an operator or by a method to give ripetible results.
You can value precision making more measurement
the relative precision is
#d=sqrt((Sigma_i (x_n- x_a)^2)/(n-1))#
#(Sigma_i (x_n- x_a)^2#
is the square of the difference between each valour (xn ) andthe average valour (xa). n= the number of time that you have make the measure
Generally several times you measure, the more accurate is the result