Cochran and Urbanczyk (1982) were concerned with the effect of the height of a room on the desired personal space of participants. They tested 48 participants in both a high-ceiling (10 ft) and a low-ceiling (7 ft) room. Participants stood with their backs to a wall while a stranger approached. Participants were told to say "stop" when the approaching stranger's nearness made them feel uncomfortable. The dependent variable was the distance at which the participant said "stop." What should the experimenters do with their data? What should they do instead if they are unwilling to use a parametric test? (Note: The distance was greater with a lower ceiling, which suggests that interpersonal space is not dependent on just horizontal distance.)