Sandra B.

asked • 04/20/21

Complaints about poor service led the Department of Motor Vehicles to investigate wait times at a local branch.

Complaints about poor service led the Department of Motor Vehicles to investigate wait times at a local branch. During one week, DMV employees randomly asked 50 people leaving this branch how long they had to wait in line. The selected people waited an average of 65.9 minutes, with a standard deviation of 6.3 minutes. Find a 99% confidence interval for the mean wait time at this DMV branch during that week. 

a. 63.6 < 𝜇 < 68.2 b. 66.6 < 𝜇 < 68.4 c. 63.6 < 𝜇 < 68.4

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