Two laboratories were used to determine the purity of a chemical compound synthesized from three sources. Within each of these laboratories, three technicians were used to carry out the analysis.

Analyze the data and state your conclusions.

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Lab I Lab II Technicians I II III IV V VI Source 1 10 8 11 17 9 10 14 15 15 13 14 13 753 11 17 15 16 11 10 Source 2 8 13 18 26 25 22 20 24 30 24 21 28 21 22 16 20 26 21 Source 3 26 18 25 22 20 21 17 18 16 212 23 29 28 14 20 20 12 18 18