A New Theoretical Interpretation of Measurement Error and Its Uncertainty

Table 1

The conceptual differences between the random variable and the sample.

Random variable	Sample
The value of is unknown	is a numerical value, which is a constant
It has many possible values	All its possible values are itself
Every sample in is a possible value of , that is,	Any other samples in are definitely not , that is, and
We can only use to describe its probability range	It is a numerical value, and no probability range needs to be described