The following stem and leaf plot gives the scores on a statistics exam taken by industrial engineering students.
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9
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0, 1, 4
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8
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3, 5, 5, 7, 8
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7
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2, 4, 4, 5, 7, 7, 8
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6
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0, 2, 3, 4, 6, 6
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5
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2, 5, 5, 6, 8
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4
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3, 6
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By standing the stem and leaf plot on its side we can see that the corresponding histogram is approximately normal. Use it to assess the empirical rule.