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Calcium levels in healthy adults is normally distributed with mean 9.5 mg/dL per deciliter and unknown standard deviation. A physician in a rural community

Calcium levels in healthy adults is normally distributed with mean 9.5 mg/dL per deciliter and unknown standard deviation. A physician in a rural community suspects that the mean calcium levels are different for women in this community. He collects measurements from 20 healthy women and finds x = 9.2 with sample standard deviation s = 1.1. Does this support his hypothesis?

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