If flying saucers are a genuine phenomenon, it would follow that the nature of sightings (that is, their physical characteristics) would be similar in different parts of the world. A prominent UFO investigator compiled a listing of 91 sightings reported in Spain and 1117 reported elsewhere. Among the information recorded was whether the saucer was on the ground or hovering. His data are summarized in the following table (87). Let pS and pNS denote the true probabilities of €œSaucer on ground€ in Spain and not in Spain, respectively. Test H0: pS = pNS against a two-sided H1. Let α = 0.01. In Spain Not in Spain

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In Spain Not in Spain 705 412 Saucer on ground Saucer hovering 53 38