A customer service center wants to answer all calls within 30 seconds to 90 seconds with Six Sigma quality. Table 2.5 shows waiting time (in seconds) for a random sample of 50 customers for a customer service call center. Based on the information provided, what can you conclude?

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TARIES Customer Waiting Times 58 54 67 68 55 51 54 67 69 59 63 52 53 56 70 S4 51 50 55 62 54 67 69 64 55 69 53 64 60 65 69 62 65 67 65 67 56 63 58 51 57 69 68 69 65 59 51 50 60 57 2.5(in seconds)