Problem: If the composition of chlorine from different samples of reservoir water are given as: 0.0010, 0.00025, 0.00028, 0.00020, and 0.00018, what is the standard deviation?

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If the composition of chlorine from different samples of reservoir water are given as: 0.0010, 0.00025, 0.00028, 0.00020, and 0.00018, what is the standard deviation?

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