Question

If the true value for a result is 4.00 cm and a student takes two measurements and reports the result as 3.94 cm and 3.95 cm, then these values are:

• A. Precise and accurate
• B. Precise but are not accurate
• C. Accurate but not precise
• D. Neither accurate nor precise

Answer 1

Answer: (A)

Precise and accurate

Precision $\to$ It can be defined as the repetition of any value.

Accuracy $\to$ It can be measured by how close a value is to the true value.

Here the result reported is $3.94$cm and $3.95$cm

Thus the result is precise.

As the difference between true value and result is $0.5$ and $0.6$

The percentage change is $1.25$%. Thus the result is accurate too.

Therefore, the correct option is $A$