2-3: Accuracy, Precision, % Error, and Measurement

Question 1

Accuracy

Answer 1

The closeness of measurements to the correct or accepted value of the quantity measured.

Question 2

Precision

Answer 2

The closeness of a set of measurements of the same quantity made in the same way.

Question 3

Equation for percentage error (textbook)

Answer 3

(Value experimental - value accepted) / value accepted * 100
Note: Experimental and Accepted are written as subscripts

Question 4

Equation for percentage error (reference table)

Answer 4

(Measured value - accepted value) / accepted value * 100