1.方差的可分解性：

• 指总的离差平方和可以分解为几个不同来源的平方和。

2.总方差的组成：

• 组间平方和（分子）：处理间方差
• 组内平方和（分母）：不是由于处理引起的方差
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• 可简化为：
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• 公式的理解：总平方和=组内平方和+组间平方和

1.Decomposability of variance:

• The total sum of squares of deviations can be decomposed into the sum of squares by different sources.

2.Composition of total variance:

• Inter group sum of squares (numerator): variance between treatments.
• Within group sum of squares (denominator): variance not caused by processing.
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• Which can be simplified as
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• Understanding of the formula: The total sum of squares = The sum of squares within groups + The sum of squares between groups