Suppose an X-Bar Chart Has a Centerline of 10

Essay

Suppose an X-bar chart has a centerline of 10.0 and upper and lower control limits of 16.0 and 4.0 respectively.The sample mean values over the next eight periods are 10.2, 9.3, 11.4, 11.8, 12.7, 14.2, 13.8, and 15.2.Would you conclude that the process is in control during this time frame? If not, which period(s) indicate an out of control process, and which tests are violated?