Question

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:

1)	( 6.044 , 6.908 )

2)	( 5.175 , 7.777 )

3)	( 3.464 , 9.488 )

4)	( -5.175 , 7.777 )

5)	( 5.191 , 7.761 )

Answer 1