Question

The volume of a liquid is 25.5ml. A student measures the volume and finds it to be 25.2ml, 25.1ml, 24.9ml and 25.3ml in the first, second, third, and fourth trial respectively. Which of the following statements is true for his measurements?

a. They have poor precision

b. They have poor accuracy

c. They are neither precise nor accurate

d. They have good precision

Answer 1

Mean volume $= \frac{25.2+25.1+24.9+25.3}{4} = 25.1 \;ml$

Answer: b. They have poor accuracy