STAT Online homework help

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  STAT Online homework help Nursing Homework Help Worksheet Difficulty: 1­Easy Learning Objective: 08­06 Know when to use Students t instead of z to estimate μ. 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 (presumably the mean would be the midrange). Substance…

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