SCENARIO 15-8 Recently, a university switched to a new type of computer-based registration. The registrar is concerned with the amount of time (hours) students are spending on the computer registering under the new system. She decides to randomly select 8 students on each of the 12 days of the registration and determine the time each spends on the computer registering. The range, mean, and standard deviation of the times required to register are in the table that follows. Day Range Mean Std.Dev. 10 5.250 3.4949 31 15.250 10.3060 13 20.375 4.9262 21 22.875 8.3911 35 8.500 11.3767 18 7.875 6.9372 25 11.250 8.5815 30 7.875 9.5235 17 10.250 6.3640 22 9.500 7.8740 11 27 7.875 8.7086 12 26 12.875 9.3723 2. Referring to SCENARIO 15-8, an R chart is to be constructed for the time required to register. The center line of this R chart is located atDay Range Mean Std. Dev. 1 10 5.25 3.4949 2 31 15.25 10.306 3 13 20.375 4.9262 4 21 22.875 8.3911 5 35 8.5 11.3767 6 18 7.875 6.9372 7 25 11.25 8.5815 8 30 7.875 9.5235 9 17 10.25 6.364 10 22 9.5 7.874 11 27 7.875 8.7086 12 26 12.875 9.3723