分析某试验中硫的含量,其测定值为37.20%,其真实含量为37.38%,绝对误差和相对误差为 ( ) 。 A: 0.18% ,0.482% B: -0.18% ,-0.482% C: -0.18% ,0.482% D: 0.18% ,-0.482%
分析某试验中硫的含量,其测定值为37.20%,其真实含量为37.38%,绝对误差和相对误差为 ( ) 。 A: 0.18% ,0.482% B: -0.18% ,-0.482% C: -0.18% ,0.482% D: 0.18% ,-0.482%
甲.乙.丙.丁测定同一试样中的含铁量(真实值37.40%),四人四次的测定结果分别为: 甲:37.38%,37.42%,37.47%,37.50% 乙:37.21%,37.25%,37.28%,37.32% 丙:36.10%,36.40%,36.50%,36.64% 丁:36.70%,37.10%,37.50%,37.90%。 上述结果准确度和精确度均好,结果可靠的是()
甲.乙.丙.丁测定同一试样中的含铁量(真实值37.40%),四人四次的测定结果分别为: 甲:37.38%,37.42%,37.47%,37.50% 乙:37.21%,37.25%,37.28%,37.32% 丙:36.10%,36.40%,36.50%,36.64% 丁:36.70%,37.10%,37.50%,37.90%。 上述结果准确度和精确度均好,结果可靠的是()
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