Final answer:
An incorrect statement about medicated shampoos would claim effectiveness not supported by evidence, such as overstating the percentage of fleas killed by a new animal shampoo despite insufficient data to prove the claim.
Step-by-step explanation:
The question pertains to medicated shampoos and which statement about them is incorrect. Medicated shampoos are formulated for specific needs, such as treating dandruff, managing hair that's been color-treated, and addressing specific allergies, including gluten or wheat sensitivities. They can also be organic or designed specifically for infants and young children, known as baby shampoo, which is typically less irritating to the eyes.
Medicated shampoos for animals often include ingredients like insecticides that help in treating skin conditions or parasitic infestations, such as fleas. An incorrect statement about medicated shampoos could falsely claim effectiveness not supported by evidence. For example, stating that a new flea treatment shampoo kills more than 25 percent of fleas without sufficient evidence would be incorrect, as the conclusion at the 1 percent level of significance indicates that the sample data does not support this claim.