A teller at a drive-up window at a bank had the following service times (in minutes) for 20 randomly selected customers: What are the
A teller at a drive-up window at a bank had the following service times (in minutes) for 20 randomly selected customers: What are the 3-sigma control limits? Select one: a. LCL = 4.385, UCL = 4.615 b. LCL 4.312, UCL = 4.689 c. LCL = 4.414, UCL = 4.586 d. LCL 4.212, UCL = 4.788 e. None of the other options. 1 SAMPLE 2 3 4 4.5 4.6 4.5 4.7 4.2 4.5 4.6 4.6 4.2 4.4 4.4 4.8 4.3 4.7 4.4 4.5 4.3 4.3 4.6 4.9
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Authors: Robert Parrino, David S. Kidwell, Thomas W. Bates
2nd Edition
978-0470933268, 470933267, 470876441, 978-0470876442
