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 four times. T9)lo;ummsk0 5 tl uun6jcq z38he readings are 37.8 cm, 37.9 cm, 3866ahqly 8f9)gtl/k x f.1 cm, 38.2 cm. What is the best esty xklgh)6qfa lf8t96/imate 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. tszr qrh,92:x+j u9lwThe extremes (37.8 cm and 38.2 cm) are both 0.2 cm away from the mean. So C is the correct answer.9 sturh: x, 9j+z2lwqr
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Post time 2024-8-21 21:38:19