论文部分内容阅读
在林业生产中,不同的抚育措施对林木高生长是否有影响?不同的育苗方法对苗木平均高是否有影响?不同的激素对种子发芽率是否有影响?不同浓度的杀虫剂的杀虫效果是否有显著差异?对这类问题可用方差分析解决。方差分析的要点是将总的平方和分解为若干项平方和,总的自由度也分解为相应项的自由度,然后求出各项均方,及有关均方的比值作为判断的依据。
In the forestry production, whether the different tending measures had any effect on the height growth of the forest? Whether the different seedling raising methods affected the average height of the seedling? Whether different hormones affected the seed germination rate? The insecticidal effect of the different concentration insecticides Is there any significant difference? Analysis of variance can be used to solve such problems. The main point of analysis of variance is to decompose the total sum of squares into several sum of squares, and the total degree of freedom is also decomposed into degrees of freedom of the corresponding terms. Then, the mean square and the mean square ratio are taken as the basis for judgment.