The following distribution list displays the number of no-shows for a particular Delta Airlines flight and the historical probability that each number of no-shows will occur. A no-show is a person who has a reservation for a flight but fails to arrive prior to its departure.

No-Shows Probability 0 0.23 1 0.32 2 0.22 3 0.15 4 0.08

a. Determine the mean number of no-shows for this flight.

b. Determine the standard deviation for the number of noshows for this flight.

AppendixLO1