The Excel file titled gasoline prices.xlsx lists the average monthly price per gallon of regular gasoline in the United States from August 1990 to January 2013 from the U.S.
Energy Information Administration. Construct a line chart using these data and describe the trend.
2.70 The Excel file titled airline performance.xlsx lists the status of 100 flights as either “on time” or “late” along with the airline for that flight.
a. Construct a contingency table for these data.
b. Construct a relative contingency table for these data.
c. What conclusions could be drawn from these data?

AppendixLO1