Читать книгу Experimental Design and Statistical Analysis for Pharmacology and the Biomedical Sciences - Paul J. Mitchell - Страница 23

The term precision reflects the consistency of a series of measurements and is therefore the ability to obtain the same value on multiple occasions. So, the measure of precision is related to the spread of the data; the higher the precision of the data, then the less the spread of the values. The measurement of precision is provided by the coefficient of variation while accuracy reflects the nearness of the measurement to the true value.

 Coefficient of variation is calculated as follows; (see Chapter 5 for information regarding calculation of the mean and standard deviation).(3.1)

 % Accuracy is calculated by dividing the measured value by the true value and is expressed as a percentage.(3.2)

Consider the following example.