第19题: [多项选择]以下问题可以用Z检验的有()。 A. 正态总体均值的检验,方差已知 B. 正态总体均值的检验,方差未知 C. 大样本下总体均值的检验 D. 正态总体方差的检验 参考答案:A, C
第20题: [单项选择]Compared to firms that expense costs, firms that capitalize expenses will have: 参考答案:A 答案解析:Firms that capitalize expenses have less variability of net income because the capitalized expense b