The local government is considering applying cost cutting measures to the number of hours its 811 line is open daily. Currently it is available 24 hours a day, 7 days a week. To help with the decision making process, the government is interested in examining the average number of calls received between 11:30pm on Saturday night and 5:00am Sunday morning. A study of 10 random such time periods from 2021 revealed that the average number of calls was 4.3 with a known population standard deviation of 11.456 calls.

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