A local dairy farm has just installed a new machine that pumps milk into 16-oz bottles. The manager of the farm wants to make sure that the amount of milk put in the bottles is 16 oz, so he randomly selects 12 bottles of milk each hour and weighs the milk. The results obtained in the last hour were

(a) Obtain the average weight of the milk.

(b) Obtain a 95 % confidence interval for the average amount of milk in the bottles.

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16.01 16.04 16.03. 16.01 15.89 15.99 15.99 16.03 16.02 16.04 16.03 16.05