Question

A volume of a liquid is 30mL. A student measures the volume and finds it to be 30.1mL,30.5 mL,30.9mL,30.3mL.which of the following statement is true.
They are neither precise not accurate.
They have poor accuracy.
They have good precision.
They have poor precision.

Answer 1

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Now, taking the average of all these values,

$\frac{30.1+30.9+30.3+30.5}{4}$ = 30.45

This shows that the student has a good precision