2.53 On-time performance of airlines In 2015, data collected on the monthly on-time arrival rate of major domestic and regional airlines operating between Australian airports shows a roughly bell-shaped distribution for 72 observations with xQ = 85.93 and s = 3. Use the empirical rule to describe the distribution. (Source: https://bitre.gov.au/

publications/ongoing/airline_on_time_monthly.aspx).