The caffeine content (in milligrams) of a random sample of 50 cups of black coffee...
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The caffeine content (in milligrams) of a random sample of 50 cups of black coffee dispensed by a new machine is measured. The mean from the sample is 96 mg with a variance of 50.41mg2 The machine is capable of dispensing 3000 cups per day, whose caffeine content is normally distributed
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