Determine the coefficient of variation

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The firm Best-Law-Service.com allows for extensive interaction between lawyers and their customers via the Internet. Best-Law-Service's broadly trained lawyers can answer incoming e-mail requests from any customer. E-mails arrive from 9am to 5pm at a rate of 6 per hour. The inter-arrival times of customer requests are exponentially distributed.

At each moment in time, there are exactly two lawyers "on call," that is, sitting at their desk waiting for incoming e-mails. It takes each lawyer, on average, 8 minutes to write the response email. The standard deviation of the response time of each lawyer is 4 minutes.

Question: Determine the coefficient of variation of the response time of each lawyer

Reference no: EM132951276

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