PPT-Accuracy vs. Precision Accuracy

Accuracy of a measurement An indication of how close the measurement is to the accepted value Percentage difference can be calculated to give a quantitative indication of a measurements accuracythe smaller the percentage difference the greater the . 1 02 03 04 05 06 07 08 09 1 Measured Value of x Fraction of Total Measurements SD 01 SD 02 SD 03 brPage 5br mean standard deviation histogram Figure 3 Mass of Unknown Sample 102 104 106 108 11 112 114 116 118 12 Mass kg of Measurements brPage 6br Chapter 1 Section 2. Accuracy. describes how close a measured value is to the true value of the quantity measured. . . a.k.a. “the right answer”, or the agreed upon answer (“consensus” among scientists). Chapter 1 Section 2. Accuracy. describes how close a measured value is to the true value of the quantity measured. . . a.k.a. “the right answer”, or the agreed upon answer (“consensus” among scientists). Definitions. Accuracy: . _____________________________________________________________________________________________________________________. The measurements can be far apart, however the average value is close to the standard value. Graphing and Sig-figs. This should be review ;). Accuracy. = . how close to the accepted value your measurement is. Precision. = . Reproducibility, your measurement closely matches your other measurements. New York State Association of Professional Land Surveyors. January 20, 2016. Dan Martin. Northeast Regional Geodetic . Advisor. Dan.martin@noaa.gov. 240-676-4762. THE CHANGE FROM LABOR INTENSIVE TO TECHNOLOGY!. MASS. Definition: Measure of the amount of matter in an object. Value always stays the same, no matter the location in the universe. Measured by a balance. Units expressed in grams (g), kilograms (kg), and milligrams (mg). Define: . Accuracy. Precision. Draw & . Label. 4 dart boards to illustrate:. . (. each board should contain . 4 marks. ). High Accuracy, High Precision. High Accuracy, Low Precision. Low Accuracy, High Precision. Accuracy vs. Precision. What is the difference?. Accuracy vs. Precision. Precision . accuracy. Exactness. Divisions on scale. Reproducibility. Uncertainty. Significant digits. Correctness. Calibration. When taking scientific measurements, the goals are to measure . accurately. and with . precision. .. Accuracy. . refers to how close a measured value is to the actual or real . value. Precision. . CONTEXT. There are two . contexts precision . and accuracy apply to: sets of data, and measuring instruments.. In a set of data, those measures give an idea of the spread and “. ballpark. ” of the answer (final measurement).. Friday. , September 2. nd. , 2016. Accuracy . vs. Precision –. Accuracy. – how close a measurement is to the actual value. Precision. – how close a group of measurements are to each other.. Look at each target below and decide whether the situation is accurate, precise, both, or neither:. Adding & Subtracting . The Rule: The denominator(s) must be the same. Ex: . 3 . + . 5 . - . 1 . = ? . 4 8 3 . Common denominator is…... …..24 . Highly precise universal milling machines for 5-sided / 5-axis machining 02 Applications and partsControl technologyTechnical data AerospaceLarge work piece volumes an optional fire extinguishing Typi