PestFree Chemicals has developed a new fungus preventative that may have a significant market among potato growers. Unfortunately, the actual extent of the fungus problem in any year depends on rainfall, temperature, and many other factors. To test the new chemical, PestFree has used it on 500 acres of potatoes and has used the leading competitor on an additional 500 acres. At the end of the season, 120 acres treated by the new chemical show significant levels of fungus infestation, whereas 160 of the acres treated by the leading chemical show significant infestation.
Do these data provide statistical proof that the new product is superior to the leading competitor?