Selling autograph sports memorabilia has turn out to be a multimillion dollar industry in United States. But just how purchaser of autographed football jersey or autographed baseball knows that autograph is authentic? In 1996, FBI said that 70% of all autographed sports memorabilia is fraudulent. Suppose that 50 pieces of autographed sports memorabilia are sampled at the large memorabilia show and that 40 of them are found to be fraudulent. At 0.05 level of significance, can it be concluded that proportion of fraudulent autographed sports memorabilia at show varies from the FBI claim?