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The biologist wants to estimate the average age of Coyotes in Tuolumne County. Her estimates from past experience suggests the standard deviation is 1.3 years.

The biologist wants to estimate the average age of Coyotes in Tuolumne County. Her estimates from past experience suggests the standard deviation is 1.3 years. How big of a sample should she take to be 95% sure her estimate is off by no more than 3 years?

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