Patent ID: 6662143
Filing Date: 2003-12-09
Classification: G01R

Abstract:
A measuring method of making measurements on a predetermined characteristic amount of a plurality of samples and obtaining a standard deviation of said predetermined characteristic amount of said plurality of samples, whereinaveraging process of making measurements by the predetermined number N0 and obtaining an average value of measured results is performed in each one of said measurements, said measuring method comprising the steps of: (a) making plural measurements on said predetermined characteristic amount of one of said plurality of samples under the same condition, thereby calculating a standard deviation &sgr;i of said one of said plurality of samples from measured results of said measurements; (b) making a measurement on said predetermined characteristic amount of each of said plurality of samples under the same condition, thereby calculating a standard deviation &sgr;s of said plurality of samples from said measured results of said measurements; (c) obtaining the number of averaging N using said standard deviations &sgr;i and &sgr;s and the predetermined number N0; and (d) performing again said averaging process by the number of averaging N while measuring said predetermined characteristic amount, and calculating said standard deviation &sgr;s of said plurality of samples from measured results of said measurements made on said plurality of samples.