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试验所得到的观测值,既包括处理的真实效应,又包括不能完全一致的许多其他因素对试验真值的偶然影响,使处理真值偏离了试验的真实效应值,形成试验误差。试验误差是衡量试验精确度的依据,误差越小精确度越高,误差越大精确度越小。显然,只有着力降低试验误差,才能取得接近处理间差异的真实效应。
The observed value obtained by the experiment includes both the real effect of the treatment and many other factors that can not be completely coincident with the true value of the experiment, so that the true value of the treatment deviates from the real value of the experiment to form the experimental error. Test error is the basis for measuring the accuracy of the test, the smaller the error the higher the accuracy, the greater the error the less accurate. Obviously, only by focusing on reducing experimental errors can one achieve the true effect of approaching the difference between treatments.