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 an: txe+5emr7r bi1mxfa7-e xej,d50w re 37.8 cm, 37.9 cb s +:dx wr77823xv bp8ktifwbw df9ztp .2pw.m, 38.1 cm, 38.2 cm. What is the best estimate of this mebwdd 2xpzw s8v7fw.32 k.ptt7bwf:9b 8pri+ x asurement?
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 38sdg /u-(yz w ff i/22mx)usgr;.2 cm) are both 0.2 cm awa/x2uggfwdsu-2rs; /( zy) m ify from the mean. So C is the correct answer.
| 
Post time 2024-8-21 21:38:19