8.55 Salmonella in produce. Salmonella infection is the most common type of bacterial food-borne illness in the United States. How prevalent is salmonella in produce grown in the major agricultural region of Monterey, California? Researchers from the US. Department of Agriculture (USDA) conducted tests for salmonella in produce grown in the region and published their results in Applied and Environmental Microbiology (April 2011). In a sample of 252 cultures obtained from water used to irrigate the re- gion, 18 tested positive for salmonella. In an independent sample of 476 cultures obtained from the region's wildlife (e.g., birds), 20 tested positive for salmonella. Is this suf- cient evidence for the USDA to state that the prevalence of salmonella in the region's water differs from the preva- lence of salmonella in the re gion's wildlife? Use or = .01 to make your decision