Errors can be minimized but not entirely avoided, because they are part of the process of measurement. Data that is mistaken should be discarded. Data that contains errors can be useful, if the sizes of the errors can be estimated. The rate at which energy is supplied. Compare with accuracy .
Precision is reproducibility.
Don't confuse precision with accuracy . Compare with systematic error , gross error and mistake . Random errors are errors that affect the precision of a set of measurements. Random error scatters measurements above and below the mean, with small random errors being more likely than large ones. Compare with absolute error .