A graph where the horizontal axis is labeled "Stress (100mm VAS)" and numbered 0, 20, 40, 60, 80, 100 and the vertical axis is labeled "Frequency" and numbered 0, 10, 20, 30, 40.
There are vertical bars with bases and heights as follows: 10 to 20, 1, 20 to 30, 4, 30 to 40, 19, 40 to 50, 32, 50 to 60, 18, 60 to 70, 34, 70 to 80, 38, 80 to 90, 36 and 90 to 100, 18.
The words "Lower tail" appear above stress = 10 to 30, "Mode" appears above stress = 40 to 50, "Mode" also appears above stress = 70 to 80, "Upper tail" appears above stress = 90 to 100.
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Last updated: 9 October, 2006.