31) Create an X-bar control chart. Include all required elements of a control chart. Analyze the chart for processstability and special cause variation. Determine if the data suggest the process

is stable or not. Use the mean +/-3-sigma test for stability. If the data suggest special cause variation exists in the process, identify all data points which fail the requested test for special causes. Label any failing data points. Be specific. No Minitab or Excel. Use the following sequential data set Calculate the mean, UCL, and LCL. Assume one standard deviation = 3.15.5.1, 4.9, 2.3, 2.3, 7.0, 4.0, 6.9, 8.0, 1.6, 7.0, 5.0, 11.0, 1.1, 13.2, 0.9, 0.6, 3.2, 1.1, 0.8, 4.8, 3.6, 4.2, 3.8, 2.9, 4.9