Its value is determined by the value of the quantity of goods required for its reproduction.

A confidence limit is the interval within which we can say that the true value of the quantity we are estimating will lie with a specified probability.

When not including uncertainty, you find the optimal decision using only , the expected value of the uncertain quantity.

Their average would provide an estimate of the true value of the quantity that generally would be more reliable than an individual measured value.

In these calculations the above integral expresses the expected value of the quantity .

Repeating the observations and taking the arithmetic mean of the result, the mean value would be very close to the true value of the measured quantity.

The values of the quantity for an expansion by the ratio - are interesting.

It must be distinguished from the numerical value of the quantity that occurs when the quantity is expressed in a particular unit.

The change is always found by subtracting the initial value of the quantity from its final value.

Any other value of the physical quantity can be expressed as a simple multiple of the unit of measurement.