本题目来源于试卷: Kognity IB Physics A.0 Measurements & Uncertainty，类别为 IB物理学
[单选题]
A student measures a distancezij0j)d 7 p7gd four t y1y**m )it(eu*i fxvbo82atp imes. The readings are 37.8 cm, 37.9 cm, 38.1 cm, 38.2 cm. What is the best eftm y2a1*ui8o*y*evx)t ( p bistimate 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 measurements is 38.0 cm. The extremes (37.8 cm and 38.2 cm) abk 6pw5 n gtm);ll17w(jd 4fjure both 0.2 cm away from t;w fn gt56j(ldm7ul 4bkwp1)jhe mean. So C is the correct answer.
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