Kognity IB Physics A.0 Measurements & Uncertainty (id: 87ba97ed9)

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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. The rea*a) mvxdlzevz e:)ya1sr-: a 1dings are 37.8 h (j6)q*gm8: ahsnprp cm, 37.9 cm, 38.1 cm, 38.2 cm. What paj*6 8p:hhs mqnr )g(is 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;6dhs . gzwb6zements is 38.0 cm. The extremes (37.8 cm and 38.2 cm) are bo h;zb.wgsdz6 6th 0.2 cm away from the mean. So C is the correct answer.