Q. 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 . On the basis of given data, mark the correct option out of the following statements.
Student Reading
(i) (ii)
A 3.01 2.99
B 3.05 2.95

 5350  234 Some Basic Concepts of Chemistry Report Error

Solution:

Student Average reading
Student Average reading
For both the students and , average reading is close to the correct reading (i.e., ). Hence, both recorded accurate readings. But the readings recorded by student are more precise as they differ only by , whereas readings recorded by the student are differ by . Thus, the results of student are both precise and accurate.