ATM transaction times for a specific bank branch are being monitored and the following data has been collected. Each sample contained 17 items. Sample Mean Range 1 4.06 .42 2 4.15 .50 3 4.11 .41 4 4.13 .46 5 4.06 .46 6 4.20 .45 Calculate the lower and upper control limits for the range. (Keep three decimal places)
Lower = 0.171 Upper = 0.729
A:Lower = 0.007 Upper = 0.319
B:Lower = 0.185 Upper = 0.716
C:Lower = 4.028 Upper = 4.208
D:Lower = 0.000 Upper = 0.900