At a football stadium, 5% of the fans in attendance were teenagers. If there were 160 teenagers at the football stadium, what wa
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Chebyshev's theorem says that the probability that a random variable differs from its mean by some multiple of the standard deviation is bounded below as
Solve for <em>k</em> :
Then the theorem says
which is to say that 88.9% of the data will fall in the interval
or roughly corresponding to scores between 7.076 and 7.924.