SAS系统中PROCSCORE程序进行线性组合分析

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"报表 12.2 回归分析后执行线性组合 - SAS" 回归分析是一种统计方法,用于研究一个或多个自变量(独立变量)与因变量(依赖变量)之间的关系。在这个例子中,我们有一个名为"OXYHAT"的模型,它探讨了五个变量(INTERCEPT、AGE、WEIGHT、RUNTIME、RUNPULSE和RSTPULSE)对OXY(因变量)的影响。 分析结果显示,模型具有显著性,因为F值为23.987,对应的概率Prob>F小于0.0001,这意味着模型整体上解释了因变量OXY的82.75%的变异(R-square)。调整后的R平方(Adj R-sq)为0.7930,这考虑了模型中的变量数量,仍显示出强相关性。 参数估计部分提供了每个变量的系数,它们代表了变量对因变量的影响程度。INTERCEPT的估计值是117.988513,表明即使其他变量取值为0,因变量的预期平均值。AGE的系数为-0.298255,表示年龄每增加一个单位,OXY预计会减少0.298255个单位。类似地,RUNTIME的系数为-2.694494,表明运行时间每增加一个单位,OXY预计会减少2.694494个单位。而RUNPULSE和RSTPULSE的系数虽然负值,但不显著,因为它们的p值大于0.05。 在SAS中,PROC SCORE是用于计算预测值或得分的程序,即基于回归模型计算新的观测值的预测因变量值。在这个报告中,可能后续会使用PROC SCORE来为新的数据集计算OXY的预测值,基于已建立的模型参数。 此外,文件标签"SAS"表明这些分析是在SAS统计软件中进行的,SAS提供了一套全面的统计和数据分析工具,包括PROC MEANS、PROC SUMMARY、PROC UNIVARIATE、PROC CHART、PROC TABULATE、PROCCORR、PROCPLOT、PROC STANDARD、PROCRANK和PROC SCORE等,用于各种描述性统计、图表制作、相关性分析和计分等功能。这些程序分别用于生成统计摘要、绘制图表、计算单变量分布特征、创建定制表格、计算相关系数、创建各种图形、标准化分数、排序以及执行线性组合等任务。

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