Kognity IB Physics A.0 Measurements & Uncertainty (id: d630d3deb)

[单选题]
An experiment used to measure the acceler4-14zupk z st,mwal(hation due to gravity produces the folyi ial,y/mqxkk *s274 lowing r m yik72i x,4ksl*ayq/esults:
$\begin{array}{llllllllll}7.83 & 6.98 & 7.52 & 8.01 & 7.76 & 7.15 & 6.87 & 7.25 & 8.35 & 7.54\end{array}$
Which of the following statements is true about these data?
Are there random or systematic errors, both, or neither?
(Acceleration due to gravity, $g$, on Earth is usually taken as $9.81 \mathrm{~m} \mathrm{~s}^{-2}$ ).

A. There is a large random error, but no systematic error.
B. There is a large systematic error, but a small random error.
C. There are large random and systematic errors.
D. There is a small random error and no systematic error.


参考答案:  C


本题详细解析:
There is significant +-qwz* a tbue/1jt, tqvariation between the individual data points, suggesting a large random error. Also, the values, as well as the average1tjz+ /,*-qaq ebuttw value, are far from the actual value of $9.81 \mathrm{~ms}^{-2}$, so a large systematic error appear to be present.