RBAR

a. Set up an x-chart with n= 4. The frequency should be sample four and then skip four. Thus, your first sample would be for minutes 1-4, the second would be for minutes 9-12, and so on. Compute the mean, x, for each sample. (Enter your responses rounded to two decimal places.) X Sample 1 2 3 4 5 6 Minutes 1-4 9-12 17-20 25-28 33-36 41-44 49-52 57-60 65 - 68 30.75 30.00 28.75 29.75 30.50 31.25 29.75 31.00 29 32.25 7 8 9 10 73 - 76 The UCL; equals minutes and the LCL, equals minutes. (Enter your responses rounded to two decimal places.) a. Set up an x-chart with n= 4. The frequency should be sample four and then skip four. Thus, your first sample would be for minutes 1-4, the second would be for minutes 9-12, and so on. Compute the mean, x, for each sample. (Enter your responses rounded to two decimal places.) X Sample 1 2 3 4 5 6 Minutes 1-4 9-12 17-20 25-28 33-36 41-44 49-52 57-60 65 - 68 30.75 30.00 28.75 29.75 30.50 31.25 29.75 31.00 29 32.25 7 8 9 10 73 - 76 The UCL; equals minutes and the LCL, equals minutes. (Enter your responses rounded to two decimal places.)