A random sample of 45 capsules was tested and produced a


A drug manufacturer claims that the mean potency of one of its antibiotics is 85%. A random sample of 45 capsules was tested and produced a sample mean of 85.3% and a sample standard deviation of 1.1%. Do the data provide sufficient evidence to refute the manufacturer's claim?

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Basic Statistics: A random sample of 45 capsules was tested and produced a
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