The height of a person is a random variable with variance ≤5 inches 2 . According to Mr. Chebyshev, how many people do we need to sample to ensure that the sample mean is at most 1 inch away from the distribution

The height of a person is a random variable with variance ≤5 inches 2 . According to Mr. Chebyshev, how many people do we need to sample to ensure that the sample mean is at most 1 inch away from the distribution mean with probability ≥95% ?

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