DEVICE, PROGRAM, AND METHOD FOR DETERMINING NUMBER OF INCIDENCES REQUIRED FOR MEASUREMENT, AND DEVICE, PROGRAM, AND METHOD FOR ESTIMATING MEASUREMENT PRECISION

摘要

[Problem] To ensure reliability of statistical data using a discrete material as a sample. [Solution] A device for determining the number of incidences required for measurement is characterized by having: a means for acquiring the number of incidences required for measurement of a class unit, with which a number N_i of incidences required for measurement of the class unit based on formula (1) can be acquired, on the basis of a ratio P^_i applied as the proportion of the number of incidences present for each class in the sample; a means for acquiring the number of incidences required for interim measurement, with which a number N_r of incidences required for interim measurement can be acquired using the number N_i of incidences required for measurement of the class unit as a maximum value, etc.; and a means for determining the number of incidences required for measurement with which the number N_r of incidences required for interim measurement, when the number of samples is equal to or greater than the number N_r of incidences required for interim measurement, is used as the true number of incidences required for measurement. In formula (1): ξ_i represents a constant that is set for each class as a degree of precision; K_P represents a constant determined in accordance with a set degree of reliability; and the suffix i represents a class number assigned for each class.