Category: 01 Units and Measurement

090 Accuracy and Precision: Dart Throws

Precision is about the deviation of data among themselves (caused by random errors).

Accuracy is about the deviation of data from the true value (caused by systematic errors).

Of the three, Set B has the poorest precision. However, the average of the three data is almost right on the bull’s eye, making it the most accurate.

Basically, large random errors may cause a large spread in the data. However, since random errors are random, they can be effectively dealt with by taking repeated measurements and averaging the data.