Use the following data:
4.4,6.3,6.4,6.4,6.9,6.9,7.1,7.2,7.2,7.2,7.5,7.5,7.6,7.7,7.8,7.8,7.8,8.2,8.4,8.5,9.1,9.2,9.2,
9.5,12.5

To find P 80

NOTE: Round your answer to two decimal places.