Single word for "accurate and precise"? [closed]

I don't want write "precise and accurate" every time! What one word replaces "precise and accurate"? Picture from St Olaf College.

Solution 1:

As you know, measurement) accuracy and (measurement) precision represent different concepts, but the St. Olaf picture is obsolete by today’s standards. According to the International Vocabulary of Metrology (2012), which is the internationally recognized reference on basic and general concepts and associated terms on the science of measurement:

2.13 (3.5) measurement accuracy / accuracy of measurement / accuracy

closeness of agreement between a measured quantity value and a true quantity value of a measurand

NOTE 1 The concept ‘measurement accuracy’ is not a quantity and is not given a numerical quantity value. A measurement is said to be more accurate when it offers a smaller measurement error.

NOTE 2 The term “measurement accuracy” should not be used for measurement trueness and the term “measurement precision” should not be used for ‘measurement accuracy’, which, however, is related to both these concepts. [Italics denote emphasis added]

NOTE 3 ‘Measurement accuracy’ is sometimes understood as closeness of agreement between measured quantity values that are being attributed to the measurand.

2.14 measurement trueness / trueness of measurement / trueness

closeness of agreement between the average of an infinite number of replicate measured quantity values and a reference quantity value

NOTE 1 Measurement trueness is not a quantity and thus cannot be expressed numerically, but measures for closeness of agreement are given in ISO 5725.

NOTE 2 Measurement trueness is inversely related to systematic measurement error, but is not related to random measurement error. NOTE 3 “Measurement accuracy” should not be used for ‘measurement trueness’. [Italics denote emphasis added]

2.15 measurement precision / precision

closeness of agreement between indications or measured quantity values obtained by replicate measurements on the same or similar objects under specified conditions

NOTE 1 Measurement precision is usually expressed numerically by measures of imprecision, such as standard deviation, variance, or coefficient of variation under the specified conditions of measurement.

NOTE 2 The ‘specified conditions’ can be, for example, repeatability conditions of measurement, intermediate precision conditions of measurement, or reproducibility conditions of measurement (see ISO 5725-1:1994).

NOTE 3 Measurement precision is used to define measurement repeatability, intermediate measurement precision, and measurement reproducibility.

NOTE 4 Sometimes “measurement precision” is erroneously used to mean measurement accuracy. [Italics denote emphasis added]

The International Vocabulary of Metrology (2012) also defines the following term:

2.26 (3.9) measurement uncertainty / uncertainty of measurement / uncertainty

non-negative parameter characterizing the dispersion of the quantity values being attributed to a measurand, based on the information used

NOTE 1 Measurement uncertainty includes components arising from systematic effects, such as components associated with corrections and the assigned quantity values of measurement standards, as well as the definitional uncertainty. Sometimes estimated systematic effects are not corrected for but, instead, associated measurement uncertainty components are incorporated.

NOTE 2 The parameter may be, for example, a standard deviation called standard measurement uncertainty (or a specified multiple of it), or the half-width of an interval, having a stated coverage probability.

NOTE 3 Measurement uncertainty comprises, in general, many components. Some of these may be evaluated by Type A evaluation of measurement uncertainty from the statistical distribution of the quantity values from series of measurements and can be characterized by standard deviations. The other components, which may be evaluated by Type B evaluation of measurement uncertainty, can also be characterized by standard deviations, evaluated from probability density functions based on experience or other information.

NOTE 4 In general, for a given set of information, it is understood that the measurement uncertainty is associated with a stated quantity value attributed to the measurand. A modification of this value results in a modification of the associated uncertainty.

Generally speaking, the uncertainty decreases as the accuracy, trueness, and precision increase, so you might say that high accuracy, high trueness, and high precision correspond to low uncertainty, which you might equate to high certainty. So perhaps the words you're seeking are high certainty, but you can't dispense with the word high to get this down to a single word.

Solution 2:

A few would be On-Target or Bull's Eye or even Spot-On. But you are looking for one word. For that I would suggest Correct. If one or many shots are correct then they would not stray far from the intended location.