1.2 Metrorail Commuter Service is studying the daily commuting patterns of workers into the central business district (CBD) of Cape Town. A study conducted seven years ago found that 40% of commuters used trains, 25% used cars 20% used taxis and 15% used buses. A recent survey of 400 randomly selected commuters found that 135 commuters used trains, 115 used cars, 96 used taxis and the remainder travelled by bus. Can the Metrorail conclude that commuting patterns into the CBD of Cape town have changed since the study seven years ago? Test the hypothesis at the 5% level of significance.​