[Determination of statistical error using the hit method]

Referring to a histological example, an explanation is given which parameters of the hit procedure have an influence upon the magnitude of the random measuring errors. The dispersion of the measuring values decreases as the number of test points increases. Moreover, if the number of test points is equal, the dispersion is dependent on the relationship between test point distance and mean diameter of the object structures. It reaches a minimum if this ratio is greater than 1 or approximates 1. By subdividing a measurement with numerous test points into small sections it will be possible to calculate the standard deviation. For this, coarse-mesh test nets with few points are favourable.