Researchers wanted to determine whether a new topical ointment would help alleviate the signs and symptoms of a skin discase knows as eczema, The new ointment was distributed to 2,000 people worldwide who suffer from eczema. At the end of the trial period of one month, the researchers examined the skin of each participant and concluded that 80% of them had shown significant improvement. Therefore, they concluded that the new ointment is a valid new treatment and should be forwarded to the FDA for approval. Was this a valid conclusion? Explain your answer,