Suppose you are a civil engineer, specializing in traffic volume
control for the City of Grand Rapids. Your department has been
receiving a multitude of complaints about traffic wait times for a
certain intersection in the heart of downtown. To see if these
claims are valid, you want to monitor the true average wait time at
that intersection. Over the course of a few months, you record the
average number of minutes a car waits at the intersection between
4:00 PM and 5:00 PM. With a sample size of 14 cars, the average
wait time is 6.476 minutes with a standard deviation of 1.6154
minutes. Construct a 99% confidence interval for the true average
wait time for a car at the intersection between 4:00 PM and 5:00
PM.
Question 3 options: