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应用反应面分析研究随机区组设计试验的趋势变异。以反应面分析法消去趋势变异后，试验的误差均方都小于常规方差分析的误差均方。因而反应面方法对于趋势变异的控制要比区组控制更为有效。提高了试验的精确度。
Response surface analysis of random block design study of the trend of variation. After eliminating the trend variation by reaction surface analysis, the mean square error of the test was less than the square error of the conventional ANOVA. Therefore, the response surface method is more effective than the block control in controlling the trend variation. Improve the accuracy of the test.