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The mean age of all high school teachers in New York state is 43years and the standard deviation of their ages is 6 years. According

The mean age of all high school teachers in New York state is 43years and the standard deviation of their ages is 6 years. According to Chebyshev's Theorem approximately what percentage of teachers are between the ages of 25 and 61 years old? Between the ages of 31 and 55 years old?

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