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The Mean Age of All High School Teachers in New

Question 21

Multiple Choice

The mean age of all high school teachers in New York state is 50 years and the standard deviation is 7 years.According to Chebyshev's theorem,the percentage of teachers in New York who are 25.5 to 74.5 years old is at least:


A) 91.84
B) 83.67
C) 87.34
D) 93.84

Correct Answer:

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