Question: The Environmental Protection Agency EPA requires that cities monitor over

The Environmental Protection Agency (EPA) requires that cities monitor over 80 contaminants in their drinking water. Samples from the Lake Huron Water Treatment Plant gave the results shown here. Only the range is reported, not the mean. For each substance, estimate the standard deviation by using one of the methods shown in Table 8.11 in Section 8.8.

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  • CreatedAugust 19, 2015
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