The McLaren formula 1 team wants to assess 5 different new wing designs. For each wing, they record 7 individual lap times and get the results (sample mean and standard deviation) listed in the table. They believe that all wings should produce the same variability in the lap times.
(a) Test whether the different wing designs are essentially equally good, or whether some design(s) is/are different. Use a 95% significance level.
(b) Wing 5 seems to be the best (lowest average lap time). Which of the other wings is it better than, to 95% significance?
