There were significant differences between all of aged groups in regression coefficient significance tests, except between 18-25 and 26-45 aged group in female.
回归系数显著性检验除女性18 ~ 25与26 ~ 45岁两组间无显著性差异外，其他各组间的差异均有高度显著性。
By orthogonal tests, the influence of three factors on the coefficient of permeability of soil-rock-mixture, the significance of different factors was determined.
通过正交试验确定了3种因素对土石混合体渗透系数的影响顺序及各因素的显著性水平。
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