·IV·
3.3.5 标准差······································································································································22
3.4 分组数据描述 ······································································································································22
3.5 包含缺失数据的样本描述 ···················································································································23
3.6 百分位数和图形描述···························································································································23
3.7 自助统计量··········································································································································24
3.8 中心矩··················································································································································25
3.9 相关系数··············································································································································26
3.10 协方差矩阵 ········································································································································26
3.11 峰度和偏度 ········································································································································26
3.11.1 峰度········································································································································26
3.11.2 偏度········································································································································27
3.12 频数表················································································································································27
3.13 列联表················································································································································28
第 4 章 线性模型·············································································································· 29
4.1 方差分析··············································································································································29
4.1.1 单因子方差分析·······················································································································29
4.1.2 双因子方差分析·······················································································································32
4.1.3 多因素方差分析·······················································································································36
4.1.4 方差分析工具 ··························································································································39
4.2 线性回归··············································································································································40
4.2.1 基本数学原理 ··························································································································41
4.2.2 有关函数介绍 ··························································································································43
4.2.3 应用实例··································································································································47
4.2.4 岭回归······································································································································56
4.3 扩展线性模型 ······································································································································57
4.4 多项式拟合··········································································································································60
4.5 稳健回归··············································································································································61
4.6 二次响应面模型 ··································································································································63
第 5 章 非线性模型 ·········································································································· 67
5.1 非线性最小二乘 ··································································································································67
5.2 决策树··················································································································································75
第 6 章 假设检验·············································································································· 79
6.1 单个样本的 t 检验 ·······························································································································79
6.1.1 基本数学原理 ··························································································································79
6.1.2 有关函数介绍 ··························································································································79
6.1.3 应用实例··································································································································80
6.2 两个样本的 t 检验 ·······························································································································80
6.2.1 基本数学原理 ··························································································································80
6.2.2 有关函数介绍 ··························································································································81
6.2.3 应用实例··································································································································81
