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4 A sample data of 500 observations has mean 20 and variance 49. Using Chebyshev's rule,...

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4 A sample data of 500 observations has mean 20 and variance 49. Using Chebyshevs rule, the number of observations between 1
4 A sample data of 500 observations has mean 20 and variance 49. Using Chebyshev's rule, the number of observations between 10 and 30 is (5) (5 Points) at most 255 at most 260 at least 255 at least 260 at least 320

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