Safety in motels and hotels is a growing concern among travellers. Suppose a survey was conducted by the National Motel and Hotel Association to determine Canadian travellers’ perception of safety in various motel chains. The association chose four different national chains from the economy lodging sector and randomly selected 10 people who had stayed overnight in a motel in each of the four chains in the past two years. Each selected traveller was asked to rate each motel chain on a scale from 0 to 100 to indicate how safe he or she felt at that motel. A score of 0 indicates completely unsafe and a score of 100 indicates perfectly safe. The scores follow. Test this randomized block design to determine whether there is a significant difference in the safety ratings of the four motel chains. Use α = 0.05.

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Traveller 71 2 3 4 5 6 7 8 9 10 Motel 1 40 65 60 20 50 30 55 70 65 45 Motel 2 30 50 55 40 35 30 30 70 60 25 Motel 3 55 80 60 55 65 50 60 70 80 45 Motel 4 45 70 60 50 60 50 55 70 75 50