Question: For 140 consecutive days, a process engineer has measured the temperature of champagne bottles as they are made ready for serving. Each day, she took

For 140 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 10 bottles. The average across all 1,400 bottles (140 days, 10 bottles per day) was 60 degrees Fahrenheit. The standard deviation across all bottles was 1.0 degree Fahrenheit.

When constructing an X-bar chart, what would be the center line? (degress Fahrenheit)

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