In January 2007 consumer reports published a study of bacteria infected chicken sold in the US. They purchased 525 broiler chickens from various stores in 23 states and tested them for bacterial contamination. Lab tests indicated 83 percent of the chickens were contaminated with campylobacter.  how would you justify a claim by the usda that's the number of chickens tested was not large enough since 9 billion chickens are sold each year?

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