Question

coffee for use in commercial machines monitors the cafteine content in its coffee. The company selects 40 samples of coffee every hour from ts determines the caffeine content. From historical data, the arene content in mali rams, mg is known to have a normal distribution with Ơ-6.1 mg. During a 1-hour time period, the 40 samples yielded a mean caffeine content of y 100 mg. Calculate』9S% confidence interval for the meen caffeine content al of the eemee produced during the hour in which the 40 samples were s-ected.

Answer 1