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Which one of the following coefficients of variation (CV) is an indication of the better precision of the experiment?
EXPLANATION
Descriptive Statistics, Experimental Designs,
- Coefficient of Variation (CV) as a Metric of Experimental Precision:
- Definition: The Coefficient of Variation represents experimental error expressed as a percentage of the general experimental mean:
- Quality Thresholds in Field Research: A lower CV signifies lower residual experimental error and higher experimental precision. In field crop and agricultural pathology trials, a $\mathbf{CV \lt 20\%}$ indicates reliable, high-precision experiments; values $\gt 20-30\%$ suggest high environmental noise, erratic infestation, or experimental inconsistency.
- Conclusion: A $\text{CV} \lt 20\%$ indicates better precision (Option 1).
Correct option: (1) <20%
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