Question: For 129 consecutive days, a process engineer has measured the temperature of champagne bottles as they are made ready for serving. Each day, she took

For 129 consecutive days, a process engineer has measured the temperature of champagne bottles as they are made ready for serving. Each day, she took a sample of 9 bottles. The average across all 1,161 bottles (129 days, 9 bottles per day) was 59 degrees Fahrenheit. The standard deviation across all bottles was 1.1 degree.

When constructing an X-bar chart, what would be the upper control limit (degrees Fahrenheit)?

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