Text table 2
Quality indicators

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Quality indicators
Symbol Meaning Coefficient of variation
A Excellent 0 to 4.9%
B Very good 5.0% to 9.9%
C Good 10.0% to 14.9%
D Acceptable 15.0% to 24.9%
E Use with caution 25.0% to 34.9%
F Too unreliable to be published > 35.0%
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