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 10 cars, the average wait time is 7.21 minutes with a standard deviation of 1.6012 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 6 options:

1)

( -5.564 , 8.856 )

2)

( 6.704 , 7.716 )

3)

( 5.605 , 8.815 )

4)

( 5.564 , 8.856 )

5)

( 3.96 , 10.46 )