Twenty-two young asthmatic participants were recruited to study the short-term effects of sulphur dioxide (SO₂) exposure. The participants were stratified into 3 different groups, based on their lung function. The participants were then exposed to SO₂ and their bronchial reactivity was recorded. The research team wanted to determine if the mean bronchial reactivity was different between the 3 groups.

Which hypothesis test should be used to answer this question?