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 readings are9gtc exqg9oy,.d /gs1 37.8 cm, 37.9 c cai ,t 95)zp*sgxrk9km, 38.1 cm, 38.2 cm. What is the best estimate of this measuremk*s )zcx59 ki9ragp,tent?
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 meassy7 tux18xtti :fch 4:urements is 38.0 cm. The extremes (37.8 cm and 38.2 cm) are both 0.2 cm away from tt xtt1::hc xi87uy s4fhe mean. So C is the correct answer.
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Post time 2024-8-21 21:38:19