本题目来源于试卷: Kognity IB Physics A.0 Measurements & Uncertainty，类别为 IBDP Physics
[单选题]
A student measures a distance fo8gt,mvj 5ur j6ur times. The readings are 37.8 chzv 9qk+ocy8m ie;;9bm, 37.9 cm, 38.1 cm, 38.2 cm. What qc 8zkm i;v+9bey9o ;his the best estimate of this measurement?
A. $37.8 \pm 0.2 \; cm$
B. $37.8 \pm 0.4 \; cm$
C. $38.0 \pm 0.2 \; cm$
D. $38.2 \pm 0.4 \; cm$
参考答案: C
本题详细解析:
The mean of the measur)b9+oz)c h,v)biq d3 jdfdz1 tements is 38.0 cm. The extremes (37.8 cm and 38.2 cm) are bojvz1 dhc,3)q)dfz9t odi+b ) bth 0.2 cm away from the mean. So C is the correct answer.
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Post time 2024-8-21 21:38:19