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CREDIT CARD COMPANY: After receiving a number of complaints about errors in billing statements, a credit card company decided to monitor its billing statements
CREDIT CARD COMPANY: After receiving a number of complaints about errors in billing statements, a credit card company decided to monitor its billing statements over a 10 day period using a sample size of 100 customer statements. The number of wrong statements identified each day is shown in the following table. Is the process in control at a two-sigma level? 1 2 Day # of wrong statements 11 12 3 10 4 9 5 5 6 7 7 8 8 14 9 2 10 6
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Operations management processes and supply chain
Authors: Lee J Krajewski, Larry P Ritzman, Manoj K Malhotra
9th edition
9788131728840, 136065767, 8131728846, 978-0136065760
