What's the difference between accuracy and imprecision?

Accuracy


Definition:

  • (n.) The state of being accurate; freedom from mistakes, this exemption arising from carefulness; exact conformity to truth, or to a rule or model; precision; exactness; nicety; correctness; as, the value of testimony depends on its accuracy.

Example Sentences:

  • (1) When subjects centered themselves actively, or additionally, contracted trunk flexor or extensor muscles to predetermined levels of activity, no increase in trunk positioning accuracy was found.
  • (2) Accuracy of discrimination of letters at various preselected distances was determined each session while Ortho-rater examinations were given periodically throughout training.
  • (3) To determine the accuracy of double-contrast arthrography in complete rotator cuff tears, we studied 805 patients thought to have a complete rotator cuff tear who had undergone double-contrast shoulder arthrography (DCSA) between 1978 and 1983.
  • (4) An experimental model was established in the ewe allowing one to predict with accuracy an antral follicle that coincidentally would either undergo ovulation (6-8 mm diameter) or atresia (3-4 mm diameter) following synchronization of luteal regression and the onset of the gonadotropin surge.
  • (5) Correlations and some clinically relevant comparisons suggested that the MMPI 168 predicted the standard MMPI with a high degree of accuracy.
  • (6) Technical manipulations to improve resolution were time consuming and added little to the accuracy of the test.
  • (7) The positive predictive accuracy of a biophysical profile score of 0, with mortality and morbidity used as end points, was 100%.
  • (8) 83 well documented cases of amoebic hepatic abscess, treated in the Philippines between 1967 and 1975, are presented with a view to showing the results of 3 different methods of management and comparing the diagnostic accuracy and overall mortality in 2 separate groups.
  • (9) The sensitivity , accuracy, and reproductibility of this method are described and discussed.
  • (10) In invasive epidermoid carcinoma, the accuracy with the self-collected specimens approached the physician-scraped specimens.
  • (11) While the correlations between speed and accuracy reversed over time, the abnormal vision group began and ended at the most extreme levels, having undergone a significantly more radical shift in this regard.
  • (12) This longitudinal study compares the accuracy of self-assessments of 22 students across four examinations during their first 2 years of medical school.
  • (13) 18 patients with typical sporadic Amyotrophic Lateral Sclerosis (ALS) were investigated by the Motor Accuracy and Speed Test (MAST) and 18 healthy age- and-sex-matched volunteers, acted as controls.
  • (14) We assume that the fragments have been assembled and address the problem of determining the degree to which the reconstructed sequence is free from errors, i.e., its accuracy.
  • (15) Labelling of the albumin with 99mTc ensured an accuracy of measurements only limited by the precision of the weighing.
  • (16) This procedure yields excellent precision and accuracy, as demonstrated by the analysis of a known amino acid mixture and of neonatal plasma.
  • (17) The midsystolic Doppler velocity showed the highest predictive accuracy (94%) for the detection of severe aortic stenosis.
  • (18) By completing these three steps, we feel that we have improved the overall accuracy of our custom block making system which has resulted in more accurate treatments for our patients.
  • (19) This data gives the radiotherapist some useful parameters for the selection of applicators and general knowledge of the accuracy of the system.
  • (20) In contrast, US-guided FNAC had an accuracy of 89% (62 of 70), a sensitivity of 76% (25 of 33), and a specificity of 100% (37 of 37).

Imprecision


Definition:

  • (n.) Want of precision.

Example Sentences:

  • (1) Uniformly spaced concentrations yielded imprecise parameters.
  • (2) Psychiatry is criticized for imprecise diagnosis, conceptual vagaries, jargon, therapeutic impotence and class bias.
  • (3) In percutaneous transluminal coronary angioplasty (PTCA) the relationships between transstenotic pressure gradient, diameter stenosis, and lesion length are imprecisely known.
  • (4) The potency of this product is determined by in-vivo bioassay in hypophysectomized rats, which is imprecise, costly and invasive, and there have been suggestions that it could safely be replaced with in-vitro or physico-chemical alternatives.
  • (5) Total assay imprecision (CV) varied between 11% and 21%.
  • (6) Two reading passages, one with nasal consonants and one without, were tape-recorded for 72 subjects: 34 selected as having precise articulation and 38 selected as having imprecise articulation.
  • (7) However, because of imprecise definitions of terms, these studies show noncomparable results.
  • (8) The present study challenges the previous reports, suggesting that these findings emerged because of imprecise methodologic procedures.
  • (9) We investigated the possibility that the spatial imprecision of amblyopic eyes can be accounted for by the relative insensitivity to contrast that has been documented for these eyes.
  • (10) This expert system, by using the fuzzy and certainty factor concepts, is able to handle imprecise and incomplete medical knowledge which has become informative.
  • (11) In this report, computer simulation is used to evaluate and compare quality-control rules designed to detect increases in within-run or between-run imprecision.
  • (12) The total imprecision (1 standard deviation) of a single measurement is about 15% of the value for each analyte.
  • (13) John Rawles's criticism of QALYs are seen as being both imprecise and largely unhelpful.
  • (14) The within-run imprecision of all electrodes was excellent.
  • (15) Imprecise definitions of these complications of necrotizing pancreatitis make inter-institutional comparisons of previously identified data dubious.
  • (16) It is concluded that tests for detection of SGA babies remain imprecise in practice, gestational weight alone correlates poorly with fetal well-being, and the need remains for sensitive tests to detect babies with genuine morbidity.
  • (17) Numerous clinicians criticise the insufficiency and imprecision, and the incoherency of the analyses of biological calculations by the usual clinical methods and thus frequently avoid prescribing such an examination.
  • (18) We conclude that inconsistent findings on the effect of menopausal status in the association of breast cancer with some reproductive factors are partly due to statistical imprecision and differential misclassification bias associated with different age-based or menses-based definitions of menopause.
  • (19) Using referral as a criterion, the question related to potential demand displayed a sensitivity of only 53%, probably because of the imprecise wording, while the specificity appeared to be 82%.
  • (20) Even admitting some imprecision for this estimate, the remarkable differences at the structural gene level shown by the species analyzed, suggest they had an early origin.

Words possibly related to "imprecision"