According to a 2009 Reader's Digest article, people throw away approximately 20% of what they buy at the grocery store. Assume this is the true proportion and you plan to randomly survey 100 grocery...

According to a 2009 Reader's Digest article, people throw away approximately 20% of what they buy at the grocery store. Assume this is the true proportion and you plan to randomly survey 100 grocery shoppers to investigate their behavior. What is the probability that the sample proportion exceeds 0.28?