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1测定中存在的问题①被测定客体自身的误差─—如磁头因材料和各部寸法的不可能完全一致所导致的性能分散；②测定手段的误差─—如多个测定器之间的相关性以及各个测定器自身的误差；③测定器主体的误差——如测定者的读数方法等。上述的各个问题都是相互独立的。统计的?..
1 Determination of the problems ① the measured object’s own error ─ ─ such as the head due to the material and the Department of the law can not be fully consistent with the performance of the dispersion; ② measurement means the error ─ ─ such as the correlation between the number of measuring As well as the error of each measuring device itself; ③ the error of the main measuring device - such as the measuring method of the reader. All the above issues are independent of each other. Statistics?..