The mean caffeine content ? of a certain energy drink is underexamination. A measure taken on a random sample of size n = 16yieldsx? = 2.4 g/l.
(a) Assuming that the standard deviation is known to be ? = 0.3,find the 95 confidence interval for ?.
(b) If that the standard deviation is unknown but the samplestandard deviation is s = 0.3, find the 95 confidence interval for?.
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