Essay
Suppose that a study has been published linking arsenic, which is commonly found in tap water, to increased cancer rates. The study also stated that arsenic levels below 10 ppm could be considered harmless. Suppose that residents of Hacienda Heights, CA, are worried about the arsenic level in the local tap water.
a) What hypothesis should they test?
b) Describe a Type I and Type II error in this context.
Correct Answer:
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a) H0 : μ = 10 Ha : μ > 10 b) A Type I err...View Answer
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Correct Answer:
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