Question 4

The following is a random sample of the number of bicyclists on the Brooklyn Bridge for sunny summer weekend days

over the past few years.

1. Assume a normal population, determine an 80% confidence interval for the average number bicyclists who will

use the Brooklyn Bridge on a sunny summer weekend day.

2. Assume a normal population, determine a 99% upper bounded confidence interval for the average number

bicyclists who will use the Brooklyn Bridge on a sunny summer weekend day.