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Arsenic is a compound that occurs naturally in very low concentrations. Arsenic blood concentrations in...

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Arsenic is a compound that occurs naturally in very low concentrations. Arsenic blood concentrations in healthy individuals arenormally distributed, with mean u 3.2 micrograms per deciliter (?g/dl) and standard deviation = 1.5 (?g/dl). Some areasare known to have naturally elevated concentrations of arsenic in the ground and water supplies. We take a random sample ofadults residing in a high-arsenic area and ask whether the data provide good evidence that the mean blood arsenic concentrationin this population is elevated compared with the 3.2 g/dl mean of the population of healthy individuals.Define the parameter examined and select the appropriate null and alternative hypotheses.Ho: ? = 3.2 ?g/dl; Ha: ?> 3.2 g/dlNone of the options are correct.Ho: ? = 3.2 g/dl; Ha: ?< 3.2 ?g/dlHo: H=3.2 ?g/dl; Ha: ## 3.2 ?g/dl

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