Question

In an investigation on accuracy and precision, Myriah measures the mass of a 10.00 g piece of metal several times. Her measurements are 9.98 g, 10.02 g, 10.01 g, and 9.99 g.

Which statement best describes her results?
They are both precise and accurate.
They are neither accurate nor precise.
They are precise but not accurate.
They are accurate but not precise.

Answer 1

They are both precise and accurate.

Explanation: the measurements are very close to the true value (accurate — mean = 10.00 g) and are tightly clustered with little spread (precise).