Generic drugs are lower-cost substitutes for brand-name drugs. Before a generic drug can be sold in the United States, it must be tested and found to perform equivalently to the brand name product. The U. S. Food and Drug Administration is now supervising the testing of a new generic antifungal ointment. The brand-name ointment is known to deliver a mean of 3.5 micrograms of active ingredient to each square centimeter of skin. As part of the testing, seven subjects apply the ointment. Six hours later, the amount of drug that has been absorbed into the skin is measured. The amounts, in micrograms, are

2.6 3.2 2.1 3.0 3.1 2.9 3.7

Is there evidence that the generic drug performs differently than the brand-name version? Justify your conclusion by finding an appropriate p-value. Make sure to check any necessary assumptions of the procedure you use.