Calculate the standard deviation of the serie: 71.9 72.2 72.1 72.0 71.8 72.3 72.1 72.0

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A: Dilution RatioAbsorbance (nm)1:21.74121:40.85691:80.41671:160.1958

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Q: Group Residuals Df Sum Sq Mean Sq F value Pr(>F) 2 2.21 1.1042 1.419 0.248 87 67.70 0.7782

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