The numbers of minutes that United Airlines flights were delayed are described by the density histogram in Fig. 29 for the 1219 United flights that departed from O€™Hare Airport in Chicago during the period October 2€“7, 2013. Some flights were delayed at least 150 minutes, but the bars would not be visible. The data are rounded to the ones place.

a. The minimum observation is -15 minutes. What does it mean in this situation?
b. Find the probability that a flight randomly selected from the 1219 flights departed early.
c. Find the probability that a flight randomly selected from the 1219 flights departed between 25 and 74 minutes late, inclusive.
d. Find the probability that a flight randomly selected from the 1219 flights departed on time OR late. Some of the bars were left blank on purpose.
e. From inspecting the density histogram, a student concludes that 38% of United flights departing from O€™Hare Airport tomorrow will depart early. What would you tell the student?

Transcribed Image Text:

United Airlines Departure Delays during October 2-7,2013 0.200 0,016 0.012 0.008 0.38 0,004 045 0.080 -25 0 25 50 75 100 125 150 Minutes