Statistics

Question:

A civil service exam yields scores with a mean of 81 and a standard deviation of 5.5. Using Chebyshev's Theorem what can we say about the percentage of scores that areabove 92?
A. At most 12.5% of the scores are above 92.
B. At most 25% of the scores are above 92.
C. At least 75% of the scores are above 92.
D. At least 25% of the scores are above 92.
E. None of the above

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