Sapling Learning Dr. Caras was characterizing a cytochrome (an iron containing p

Question

Sapling Learning Dr. Caras was characterizing a cytochrome (an iron containing protein) from a new strain of bacteria. He obtained the following valueš in eight measurements of the percent iron in the protein: 0.2907%, 02903%, 02896%, 0.2892%, 0.3015%, 0.2899%, 0.2907%, 0.2897% Calculate the mean (x) and standard deviation (s) for these results. Number Number x = 110.29 110.004 Use the Grubbs test to determine if one of these values is an outlier. What is the value of Geakulated? Should this potential outlier be rejected with 95% confidence? Critical values of G can be found in the following table. O The potential outlier should be kept. o The potential outlier should be rejected. Number 'calculated2.875

Explanation / Answer

Mean = 0.29145

Standard deviation = 0.00409

Grubbs test

G = (largest data point - mean)/s

= (0.3015 - 0.29145) /0.00409

= 2.4572

Gtest (2.4572) > Gcritical (2.03) : reject the outlier.

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