The Department of Motor Vehicles is concerned about the length of time customers wait in line...
The Department of Motor Vehicles is concerned about the length of time customers wait in line at
the Sacramento office. The satisfaction surveys indicate the wait time may be well above the
statewide average of 11.30 minutes for all DMV offices. DMV wants to closely monitor the wait
time. To start, a sample of 250 customers’ wait time was drawn to develop a baseline performance
target for the performance tracking. The average wait time of the sample is 11.90 minutes, with a
standard deviation of 3.90. Create a 95% and a 99% confidence interval to estimate the wait time.
What is your conclusion about the wait time in the Sacramento office?
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