Module 2 - Data stuff and terminology (to finish)

Question 1

How do you combine uncertainties when adding or subtracting data?

Answer 1

ADD the absolute uncertainties together

Question 2

How do you combine uncertainties when multiplying or dividing data?

Answer 2

ADD the percentage uncertainties together

Question 3

How do you combine uncertainties when raising data to a power?

Answer 3

MULTIPLY the percentage uncertainty by the power

Question 4

Define a systematic error?

Answer 4

Systematic error - Measurement error which is consistent of follows a pattern

Question 5

Define a random error?

Answer 5

Random error - Measurement error due to unpredictable variation form one reading to the next

Question 6

Define an anomaly?

Answer 6

Anomaly - A result that clearly doesn’t fit the trend

Question 7

Define uncertainty?

Answer 7

Uncertainty - The interval within which the true value can be expected to be

Question 8

Define Accuracy?

Answer 8

Accuracy - How close a measurement is to the true value

Question 9

Define reproducability?

Answer 9

Reproducability - If you get similar results when trying to reproduce your experiment under similar but not identical conditions it is reproducible

Question 10

Define precision?

Answer 10

Precision - The closeness of agreement between repeats

Question 11

Define repeatablility?

Answer 11

Repeatability - A measurement is repeatable when a repetition under the same conditions gives the same or similar results

Question 12

Define reliability?

Answer 12

Reliability - If you can repeat your results and someone else can reproduce them to get similar values they are reliable