In the past 20 of all airline passengers flew first In the past, 20% of all airline passengers flew.

In the past 20 of all airline passengers flew first
In the past, 20% of all airline passengers flew first class. In a sample of 15 passengers, 5 flew first class. At α = 0.10, can you conclude that the proportions have changed?

In the past 20 of all airline passengers flew first