A Population of Flights Can Be Classified According to Two

Multiple Choice

A population of flights can be classified according to two factors: duration (short, medium, or long) and purpose (vacation or business) . We are interested in whether either of these factors has an effect on price. The table below gives mean prices for a balanced population. The difference between the cost of a business flight and the cost of a vacation flight:

A) is constant across distance.
B) differs by distance.
C) depends on the time of day.
D) cannot be determined with the information given.