Medicine and Clinical Studies
The active ingredient in antiseptic liquid bandages is 8-hydroxyquinoline (8h). This chemical can be harmful through simple skin contact, by swallowing, or inhalation. Suppose the list of ingredients on a 3M Nexcare liquid bandage indicates that the volume of 8h is 1%. A random sample of eight bottles of this product was obtained, and each was analyzed to obtain the volume of 8h.
The sample mean was x‾ = 1.025%. Assume the underlying population is normal and σ = 0.04. Is there any evidence to suggest that the true mean percentage of 8h is different from 1%? Use a = 0.01 and compute the p value.