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 distance four times. The readings are 6a + s/iws-0 l8hw8itzihu8z i37.8 cm, 37.9 cm,pzqk9:j6cfu r*h 7u y:iq6py- 38.1 cm, 38.2 cm. What is the best estimate of t 6:zf u 9pkqcy-:y 6iuhq*7pjrhis 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 y l/tudl5s/r9(37.8 cm and 38.2 cm) are both utr yds5/ l/l90.2 cm away from the mean. So C is the correct answer.
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