A pizza delivery service wants to track its delivery times. They take 3 samples of 5 deliveries and record the following data. What is the upper control limit (UCL) of their X-bar chart? (Your answer should be in 2- decimal places) Sample # 1 2 3 Item #1 20.3 23.2 23.5 Item #2 21.2 23.2 20.4 Item #3 21.6 20.5 22.2 Item #4 21.3 22.5 22 Item #5 20 22.7 21.8 For your computation, you may need to refer to the following coefficient table: SAMPLE SIZE n A2 D3 D4 2 1.88 0 3.27 3 1.02 0 2.57 4 0.73 0 2.28 Item #3 21.6 20.5 22.2 Item #4 21.3 22.5 22 Item #5 20 22.7 21.8 For your computation, you may need to refer to the following coefficient table: SAMPLE SIZE n A2 D3 D4 2 1.88 0 3.27 3 1.02 0 2.57 4 0.73 0 2.28 5 5 0.58 0 2.11 6 0.48 0 2 2. A pizza delivery service wants to track its delivery times. They take 3 samples of 5 deliveries and record the following data. What is the upper control limit (UCL) of their X-bar chart? (Your answer should be in 2- decimal places) Sample # 1 2 3 Item #1 20.3 23.2 23.5 Item #2 21.2 23.2 20.4 Item #3 21.6 20.5 22.2 Item #4 21.3 22.5 22 Item #5 20 22.7 21.8 For your computation, you may need to refer to the following coefficient table: SAMPLE SIZE n A2 D3 D4 2 1.88 0 3.27 3 1.02 0 2.57 4 0.73 0 2.28 Item #3 21.6 20.5 22.2 Item #4 21.3 22.5 22 Item #5 20 22.7 21.8 For your computation, you may need to refer to the following coefficient table: SAMPLE SIZE n A2 D3 D4 2 1.88 0 3.27 3 1.02 0 2.57 4 0.73 0 2.28 5 5 0.58 0 2.11 6 0.48 0 2 2