Question

One blood glucose meter always reads 10 too high. Another meter reads anywhere from 5 to 9 too high. Which one is the more precise? which one is the more accurate? How is accuracy different from precision?

Answer 1

Meter 1 which ALWAYS reads 10 too high is more precise. Meter 2 which reads anywhere from 5 to 9 too high is more accurate than meter 1. Accuracy is based on how near the reading is to the correct value, since meter 2 only has an error range of 5-9, it is more accurate compared to meter 1 which has an error of 10. Precision, on the other hand, is described as how near the reading is to each other. It is stated that the reading ALWAYS reads 10 too high, so if reading 1 is 20, reading 2 is 20, reading 3 is 20, these readings are very precise. 

Answer 2

Answer:

Meter which reads 10 as too high is more accurate while meter which reads anywhere between 5 to 9 is precise

Explanation:

Meter A which reads 10 as too high is more accurate while meter B which reads anywhere between 5 to 9 as too high is precise.

If meter A is used practically , then all the values equal to 10 will be shown as too high. On the other hand any reading between 5 to 9 will be depicted as too high in case of meter B .

Accuracy means the number of observations taken are near to the final solution. Precise means that the number of observation which may not be near to the final answer but are near to each other.