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In Problem 3.71, you were introduced to a teabag-filling operation. An important quality characteristic of interest for this process is the weight of the tea in the individual bags. The file [Teabags] contains an ordered array of the weight, in grams, of a sample of 50 tea bags produced during an 8-hour shift.
a. Is there evidence that the mean amount of tea per bag is different from 5.5 grams? (Use )
b. Construct a 99% confidence interval estimate of the population mean amount of tea per bag. Interpret this interval.
c. Compare the conclusions reached in (a) and (b).

Sagot :

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