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Wildlife biologists want to estimate the infection rate of a virus in the rhinoceros population. They are preparing to test a random sample of rhinos.

Wildlife biologists want to estimate the infection rate of a virus in the rhinoceros population. They are preparing to test a random sample of rhinos. How many should they test if they want to be 95% sure that their sample proportion is accurate within plus or minus 6%? Assume that they do not have any idea what the infectionn rate is before testing

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