6.124a During the National Football League’s 2014 AFCchampionship game, officials measured the air pressure on 11 of thegame footballs being used by the New England Patriots. They foundthat the balls had an average air pressure of 11.1 psi, with astandard deviation of 0.40 psi.
- Assuming this is a representative sample of all footballs usedby the Patriots in the 2014 season, perform the appropriate test todetermine if the average air pressure in footballs used by thePatriots was significantly less than the allowable limit of 12.5psi. There is no extreme skewness or outliers in the data, so it isappropriate to use the t-distribution.
