Q2: In a study of the legibility and visibility of highway signs, a Pennsylvania research firm determined the maximum distance (in feet) at which each of 30 drivers could read a

newly designed road sign. The 30 participants ranged in age form 18 to 82 years of age.

The government agency that funded the research hoped to improve highwaly safety for

older drivers and wanted to examine the relationship between age and the sign legibility

distance. Below is the computer output for the 30 drivers.

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