【摘要】 本文对202例胎儿测量的数据进行了多元线性回归分析和逐步回归分析,包括胎儿身长（x₁）,顶臀长（x₂）、枕额径（x₃）、双顶径（x₄）、头围（x₅）、胸围（x₆）、腹围（x₇）和体重（x₈）等八个自变量与应变量胎龄（y）的关系,即:y=b₀十b₁x₁+b₂x₂+b₃x₃+b₄x₄+b₅x₅+b₆x₆+b₇x₇+b₈x₈的多元回归方程。结果各项指标均与胎龄有明显的相关性,其中x₁、x₃、x₅、x₆、x₇、x₈与胎龄的相关性最大。更多还原

【Abstract】 The data of 202 foetuses are analysed by pluralistic linear regression and progressive regression in this paper.Independent variable consists of foesus length（X₁）,crown-buttock length（X₂）, occipitofrontal diameter（X₃）,parieto-parietal diameter（X₄）, circumference of head（X₅）,circumference of breast（X₆）, circumference of abdomen（X₇）and body weight（X₈）.We have analysed the relationship between all independent variables and fertilization month-age of foetus,dependent variable（Y）.We get a pluralistic regression equation,i.e.Y=b₀+b₁x₁+b₂x₂+b₃x₃+b₄x₄ b₅x₅+b₆x₆+b₇x₇+b₈x₈.The results show that there are patent orrelatives between all independent variables and fertilization month- age of foetus.Of them,correlative coefficients are largest between X₁,X₃,X₅,X₆,X₇,X₈ and fertilization month-age of foetus.更多还原