For a number of flights, the file Flighttimedata.xlsx contains the following information: Was the flight on time or delayed? Day of week: 1 = Monday, 2 Tuesday...... 7 = Sunday Time of day: 1-6-9 AM, 2-9 AM-3 PM, 3-3-6 PM, 4= After 6 PM Was the weather good or bad?

a. Using this data develops a Naive Bayes classifier that can classify a given flight as on-time or delayed.

b. Compare the percentage of the flights correctly classified by Naive Bayes to the fraction correctly classified by the proportional classifica- tion rule.