1 Skills Flashcards
accuracy definition
a measurement result is considered accurate if it is judged to be close to the true/acceptable value
anomaly definition
value in a set of results that is judged not to be part of inherent variation
control variable definition
values kept the same
dependent variable definition
variable which is measured whenever there is a change in the independent variable
independent variable definition
variable which is deliberately changed or selected
line of best fit definition
line drawn on graph that passes as close as possible to data points
represents best estimate of underlying relationship between variables
precision definition
closeness of agreement between measured values obtained by repeated measurements
random error definition
measurement error due to small uncontrollable effects
range definition
difference in maximum and minimum values of independent or dependent variables
repeatability definition
precision obtained when measurements made in one laboratory, single operator, using same conditions, over short timescale
reproducibility definition
precision obtained when measurements made by different laboratories (different operators, different equipment)
resolution definition
smallest change in input quantity measured by measuring instrument that gives perceptible change in reading of measuring instruments
systematic error definition
error due to measured value differing from true value by same amount each time
uncertainty definition
interval within which true value can be expected to lie, to a given level of confidence/probability
validity definition
suitability of method used to answer question being asked
