Question

Determine the precision and accuracy of these data for dioxin. Sample 1 Sample 2 Sample 3 21.6 78.3 271 Known concentration (ng/mL): 32.9 72.7 283 18.0 58.9 263 71.5 241 Experimentally determined values (ng/mL): 23.3 20.1 90.8 287 20.0 70.4 233 24.2 73.5 259

Answer 1

Sample of lenowa cengenbation : 21-6 Griglmus. fzperimental valuesom32.91 18·0, 23-3; 2001, 20·0,2412 Ly Number of dataset: 6 Mean value. 32.9+18.0+ 23.3 +20,1 € 20.0 + 24-2. 2.3.08.3333 • 23:1 @gime Standard deviation (842 30-3)2+ (22-)) (n-3) 2 S 5. 32744 S. 5 g Relative Standard deviations loos 100x5.3 2.3.1 Precision Relative Blandard deviation % 23-08 A Accevory Pielative ewiodi) known Caca Oblened sonca -- known.in known cong 23-1-2106 x 100 CS Slanned with CamScanner Accuracy 6.94%

Page : Date : known Goncea Sample 24 78.3 (nglme.) Experimental value , dataset englmes 22.7% 58.9,7:57 9018, 7o.4, 73.5 Number of data set's 6 Mean value (8 72:7 + 58.97 715+90 87 79.493.5 . - 72.96667 17200 Standard deviation (5) - - 2 2 4 (0-3 haran-2 bn-l S 0-24 696 $s 10.3 loos Relative standard deviation - 100x1033 72 0 Relatiue Standard deviation 74.04'/. Tobserved cong fcrelative errod)- known Gono knowiona X100 Accuracy Xtoo 173.0- 78.3 78.3 6.81% A curacy cs Scatted with SamScanner

Page : Date : Sample 3 known concos 271 g/my Experimental value dataset ing Image 28212637 241, 287+ 233, 259 . Number of dataset: 6 2834 26 3+291+28 7 +2387259 mecins : 2.60.2 Standard deviation [ (212) 2 (242) 2 2 2 (na) 2 A Sa 21-3761 S2 2119 Relative standard deviation a loos x 100 x 2109 26012 Petative standard deviation ह.पांग Accuracy fgielolive e Albiooth lobserved conc lenown conc Yenowncona! Xlod 2.60.2 - 271) 2>) Acuraj 42 is started with ClamScanner