Question

if the known mass of an object is 31 g, what is the accuracy of the data?
trial | mass (g)
1 | 25
2 | 36
3 | 32
average | 31
options:
it is not accurate.
it is not precise.
it is accurate.
it is precise.

Explanation:

Step1: Recall accuracy definition

Accuracy refers to how close a measured or averaged value is to the true (known) value. The true mass is 31 g, and the average of the trials is also 31 g.

Step2: Evaluate accuracy

Since the average measured value (31 g) matches the known true value (31 g), the data is accurate. Precision relates to how close repeated measurements are to each other, but here we focus on accuracy.

Answer:

It is accurate.