PPT-1 Accuracy and Precision
Author : min-jolicoeur | Published Date : 2019-11-06
1 Accuracy and Precision Notes Chemistry 1 2 Uncertainty in Measurements There is no such thing as a perfect measurement All measurements have a degree of uncertainty
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1 Accuracy and Precision: Transcript
1 Accuracy and Precision Notes Chemistry 1 2 Uncertainty in Measurements There is no such thing as a perfect measurement All measurements have a degree of uncertainty because Instruments have flaws. 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 What’s the Diff?. Accuracy. Accuracy: . How . closely a measurement matches true or actual values. To . be accurate only requires the true value (the . bulls eye. ) and one measurement (one arrow to hit . Regis Kopper. Mara G. Silva. Ryan P. McMahan. Doug A. Bowman. Introduction. Large high resolution displays are becoming cheap and common. New interaction styles are needed. Traditional mouse isn. ’t enough. TP+FN(1)Falsealarm=FP TN+FP(2)Precision=TP TP+FP:(3)Thesequalitiesaretypicallycombinedintoasinglescore.OnecommonscoreistheF-measure:F-measure=(1+2)PrecisionRecall 2Precision+Recall=(1+2)TP (1+ 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). Jeff Pool. March 19. th. , 2012. Motivation. Why energy?. It matters everywhere:. - Mobile devices. - Desktop computers. - Servers, data centers. It’s a bottleneck to performance!. 2. http://img717.imageshack.us/img717/3936/1101771coolitomni.jpg. 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. 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. Apostolia M. Tsimberidou, . MD, PhD. Professor . Investigational Cancer Therapeutics. Incorporation of Levels of Evidence into Variant Reporting/Clinical Practice. Implementation of CAP, AMP, ASCO recommendations. Melody Montgomery. Today’s Session. Focus. – . Structure Your Writing.. Precision. – . Unravel Nouns. . Concision. – . Activate Sentences. Avoid Redundancy.. Revision. – . Writing . IS. 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).. 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 measurement’s accuracy—the smaller the percentage difference, the greater the . Adding & Subtracting . The Rule: The denominator(s) must be the same. Ex: . 3 . + . 5 . - . 1 . = ? . 4 8 3 . Common denominator is…... …..24 .
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