Question

Two students performed the same experiment separately and each one of them recorded two readings of mass which are given below. Correct reading of mass is 3.0 g. On the basis of given data, mark the correct option out of the following statements.
(a) Results of both the students are neither accurate nor precise.
(b) Results of student A are both precise and accurate.
(c) Results of student B are neither precise nor accurate.
(d) Results of student B are both precise and accurate.

Answer 1

Answer: (b) results of student A are both precise and accurate

Explanation:

This is because both the values are closed to each other as well as both are closed to its true value i.e 3. 0 g

Answer 2

Answer:

(b) Results of student A are both precise and accurate.

Explanation:

Student A ;

Average reading = 3.01 + 2.99/2 = 3 g

Student B ;

For both the student's A and B, average reading is close to the correct reading (i.e., 3.0 g). Hence, both recorded accurate readings. But the readings recorded by student A are more precise as they differ only by ± 0.01, whereas readings recorded by the student B are differed by + 0.05. Thus, the results of student A are both precise and accurate.