f test

The affect factors that F test used in the measure process that external standard control samples in ecosystem geochemistry and the precision control methods of F-test Value incline to 1 are investigated.

分析了生态地球化学样品测试外部标准控制样F检验值的影响因素,探讨了F检验值趋向1的精确控制方法。

The main controlling technology, statistics t-test and F-test, is explored.

探讨测量过程的主要控制技术：t检验和F检验，把t分布和F分布的分位数的计算问题统一地归结为了1/2整数倍贝塔分布的分位数计算。

Application of F test in the annual precipitation calculation;

F检验法在年降水量分析计算中的应用

The model has been verified available with residual error and F test.

并经残差分析和 F检验证明了模型的有效性 。

Based on the result of residue error analysis and F test,the validity of this model has been proved.

二阶多项式回归数学模型能很好的拟合具有抛物线规律的离心泵流量 扬程性能曲线,并经残差分析和F检验证明了模型的有效性。

Results We provided a statistical method(scatter gram,F-test)to repeated data and non-repeated data.

结果针对有重复和无重复两种资料,提出了散点图轮廓判断法和F检验法。