Below is a table showing the number of fights at US airports that were delayed on the tarmac for more than 3 hours before departure during a recent 12-month period
Month Delayed Flights
March........ 85
April........ 74
May........ 34
June......... 268
July......... 161
August........ 66
September........ 6
October......... 11
November...... 4
December...... 34
January....... 20
February........ 60
a. Identify the 50 th percentile (median value) for the fight delay data.
b. Identify and interpret the 90 th percentile for the data.
c. Identify and interpret the 20 th percentile for the data.