A fabric researcher is studying the durability of a fabric under repeated washings. Because the durability may depend on the water temperature and the type of cleansing agent used, the researcher decides to investigate the effects of these factors on durability. The water temperature used in the experiment will be: hot (145 degrees F), warm (100 degrees F), and cold (50 degrees F). The cleansing agents will be regular Tide, regular Cheer and Ivory Liquid. Each piece of fabric used, will be washed 50 times in a home automatic washer with a specific combination of water and cleansing agent. The strength of the fabric will then be tested by a machine which forces a steel ball through the fabric and record the fabric’s resistance to breaking.

Dependent Variable:
Independent Variable:
Control Variable:
Experimental Group:
Control Group: