PA 9-7 For 120 consecutive days, a process engineer... For 105 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 945 bottles (105 days, 9 bottles per day) was 52 degrees Fahrenheit. The standard deviation across all bottles was 0.9 degrees. (Round your intermediate calculations and final answer to 4 decimal places.) When constructing an X-bar chart, what would be the upper control limit? degrees Fahrenheit