Two students A and B performed the same experiment separately and each one of them recorded two readings of mass which are given below. Correct reading of mass is 4.0 gram. On the basis of given data, mark the correct option out of the following statements:

(a) Results of both s

Question

Two students A and B performed the same experiment separately and each one of them recorded two readings of mass which are given below. Correct reading of mass is 4.0 gram. On the basis of given data, mark the correct option out of the following statements:

(a) Results of both students are neither accurate nor precise.
(b) Results of student A are both accurate and precise.
(c) Results of student B are both accurate and precise.
(d) Results of student B are neither accurate nor precise.

Accepted Answer

>

> [!TLDR]
> Student A's two readings are close to each other (precise) and average to the true value (accurate); student B's readings are also correct on average but scattered further apart, so B is accurate but not precise.
>
> The true mass is 4.0 g.
>
> **Student A:** readings 4.01 g and 3.99 g.
> - Average $= \dfrac{4.01+3.99}{2} = 4.00$ g $\approx$ true value $\Rightarrow$ **accurate**.
> - The two readings differ from each other by only $0.02$ g $\Rightarrow$ **precise**.
>
> **Student B:** readings 4.05 g and 3.95 g.
> - Average $= \dfrac{4.05+3.95}{2} = 4.00$ g $\approx$ true value $\Rightarrow$ also accurate on average. …

Q.Two students A and B performed the same experiment separately and each one of them recorded two readings of mass which are given below. Correct reading of mass is 4.0 gram. On the basis of given data, mark the correct option out of the following statements:

Concept understanding — Precision and Accuracy of Measurement

Q.Two students A and B performed the same experiment separately and each one of them recorded two readings of mass which are given below. Correct reading of mass is 4.0 gram. On the basis of given data, mark the correct option out of the following statements:

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