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A researcher claims that serum copper concentrations increase in infants from the age of 7 days to the age of 60 days. The table shows the serum copper concentrations (in micrograms per deciliter) for 12 randomly selected infants at the age of 7 days and at the age of 60 days. At α = .05, is there enough evidence to support the researcher’s claim? Assume the populations are normally distributed.

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  • A researcher claims that serum copper concentrations increase in infants from the age of 7 days to the age of 60 days. The table shows the serum copper concentrations (in micrograms per deciliter) for 12 randomly selected infants at the age of 7 days and at the age of 60 days. At α = .05, is there enough evidence to support the researcher’s claim? Assume the populations are normally distributed.


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