A shopping mall wanted to determine whether the more expensive “Tough Stuff" floor wax was better than the cheaper “Steel Seal” floor wax at protecting its floor tiles against
scratches. One liter of each grade of floor wax was applied to each of the 5 ¢st sections of the
main hall of the mall. The test sections were all the same size and were covered with the
same kind of tiles. Five other test sections received no wax. After 3 weeks, the number of
scratches in each of the test sections was counted. what is the experimental variable?
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