Airline satisfaction. An international airline company asked 2023 of its first-class passengers and 1255 of its economy-class passengers how they would rate the on-board services offered to them during the f light.

Responses were collected by class, using a five-point scale ranging from “Excellent” to “Poor,” with an option to refuse to answer. The tabulated results appear in the following contingency table:

a) Compare the distribution of opinions between first-class passengers and economy-class passengers. Is it reasonable for someone to conclude that the economy-class passengers are less satisfied than the first-class passengers?

b) Is it reasonable to conclude that more than 10% of economy-class passengers think that the services offered are excellent? Why?