Terminology

Question 1

Accuracy

Answer 1

How close a measure is to the true value

Question 2

Repproducibility

Answer 2

If you can get similar results when trying to reproduce your investigation under equivalent (but not identical) conditions. It is reproduceable

Question 3

Precision

Answer 3

Precise measurements are ones where there is little range about the true results

Question 4

Repeatability

Answer 4

A measurement is ‘repeatable’ when a repetition under the same conditions gives the same or similar results

Question 5

Resolution

Answer 5

The smallest change in the quantity being measured of a measuring instrument that gives a perceptible change in the reading

Question 6

Measurement error

Answer 6

The difference between a measurement value and the true value

Question 7

Random error

Answer 7

Can cause readings to be spread about the true value due to results varying in an unpredictable from one measurement to the next

Question 8

Systematic error

Answer 8

Can cause readings to differ from the true value by a consistent amount each time a measurement is made.

Question 9

True value

Answer 9

The value that would be obtained in a ideal measurement

Question 10

Independent variable

Answer 10

The variables that are changed