Question 4 (4 marks)
SAA recently introduced a non-stop flight from Johannesburg to New York. The director of marketing
for SAA decided to conduct an experiment to see whether SAA's passenger load on this flight is
similar to that of its two major competitors (Delta and air America). Five-day time flights were selected
at random from each of the three competing airlines and the percentage of empty seats on each flight
was recorded:
SAA
26
22
23
23
25
Delta
22
21
19
22
20
Air America
20
18
16
21
20
Test the appropriate hypothesis to determine whether the three airlines differ with respect to mean
percentages of empty seats on a flight on this route. Use the 1% level of significance.
