Question

You measure the mass of a block 5 times and get the following values :0.48g,0.51g, 0.50g,0.49g ,0.50g .the true mass is 0.60g how would you characterize your measurement in terms of accuracy and precision

Answer 1

90% accuracy.

Precision is very low.

Explanation:

Mass of blocks value = 0.48g, 0.51g, 0.50g, 0.49g, 0.50g

Average value of m =  0.496 g.

So the measurement can be written as (0.50 +- 2) g

The actual measurement is 0.60.

Variation percentage from the measured value = (0.60 - 0.50) * 100 = -10%.

Error percentage is 10%, so accuracy is 90%.

Precision is very low as not one out of 5 readings were accurate.