Question

A Internet provider has implemented a new process for handling customer complaints. Based on a review of customer complaint data for the past 2 years, the mean time for handling a customer complain was 27 minutes. Three months after implementing the plan, a random sample of the records of 50 customers who had complaints produced the following response times. Use the 50 data values to determine if the new process has reduced the mean time to handle customer complaints.
a. Estimate the mean time for handling a customer complaint under the new ­process using a 95% confidence interval.
b. Is there substantial evidence (a = .05) that the new process has reduced the mean time to handle a customer complaint?
c. What is the population about which inferences from these data can be made?


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  • CreatedNovember 21, 2015
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