A sample of 3000 observations has a bell-shaped distribution with a mean of 82 and a standard deviation of 16.

A sample of 3000 observations has a bell-shaped distribution with a mean of 82 and a standard deviation of 16.

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A sample of 3000 observations has a bell-shaped distribution with a mean of 82 and a standard deviation of 16. Using the empirical rule, find what percentage of the observations fall in the intervals x-bar ± 1s, x-bar ± 2s, and x-bar ± 3s.

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