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 readt7:wbkcs q k g2o(r9+iings are 37.8 cm, 37.mwp.mxe ;m8,qifa wq(p m3 m609 cm, 38.1 cma, i8(pw;m360 mxpmqwf.q mem, 38.2 cm. What 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 measurements is 38.0 cm. Th,,vdsdkq s 96mlhq*kqh3q9c* e extremes (37.8 cm and 38.2 cm) are both 0.2 cm away from the mean. So C is the coqdcs*qmv *9dskl9 q3,,hhkq 6rrect answer.