Point estimate of the mean time

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Reference no: EM131019848

An office manager has implemented an incentive plan that she thinks will reduce the mean time required to handle a customer complaint. The mean time for handling a complaint was 30 minutes prior to implementing the incentive plan. After the plan was in place for several months, a random sample of the records of 38 customers who had complaints revealed a mean time of 28.7 minutes with a standard deviation of 3.8 minutes.

a. Give a point estimate of the mean time required to handle a customer complaint.

b. What is the standard deviation of the point estimate given in (a)?

c. Construct a 95% confidence on the mean time to handle a complaint after implementing the plan. Interpret the confidence interval for the office manager.

d. Is there sufficient evidence that the incentive plan has reduced themean time to handlea complaint?

Reference no: EM131019848

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