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 distantz2xtb6 .6xrh ce four times. The readings are 37.8 cm, 37.i 2(p 5vsw7gpb9 cm, 38.1 cm, 38.2 cm. What is the best estimate ofpi25gs(wvpb7 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) are 2ib8y.e qd)(0n hbq8b41b)fz qlvdx xboth 0.2 cm away from tq 2df x hq vl.bi(8bd0)zx4)1nq8ebb yhe mean. So C is the correct answer.