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
brand of floor wax was applied to each of 5 test 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 (5) other test
sections received no wax. After 3 weeks, the number of scratches in each of the test sections was
counted.
■ Independent variable: ■ Dependent variable: ■ Control: ■ Constants:
Independent variable: Type of floor wax (Tough Stuff or Steel Seal)
Dependent variable: Number of scratches on the floor tiles
Control: Test section with no wax applied
Constants: Size of test sections, type of tiles used on the floor, time period (3 weeks), amount of wax applied (1 liter) on each test section
■ Independent variable: The type of floor wax (Tough Stuff and Steel Seal).
■ Dependent variable: The number of scratches on the floor tiles.
■ Control: The 5 test sections that received no wax.
■ Constants: The size of each test section, the type of tiles used, the duration of 3 weeks for observation.