# Question: A sample of 2000 observations has a mean of 74

A sample of 2000 observations has a mean of 74 and a standard deviation of 12. Using Chebyshev’s theorem, find at least what percentage of the observations fall in the intervals ± 2s, ± 2.5s, and ± 3s. Here ± 2s represents the interval – 2s to + 2s, and so on.

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