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【单选题】
下列哪一项描述不是正态分布的特征A.
曲线位于横轴上方均数处最高
B.
以零为中心，左右对称
C.
均数为其位置参数
D.
标准差为其变异度参数
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举一反三
【简答题】简答国家通过法律保障权利实现的主要途径
【简答题】缺口平移法(nick translation)
【简答题】弧度标注的快捷键
【单选题】Nick considers macaroni and cheese to be an inferior good. As a result of macaroni and cheese being an inferior good, the
A.
substitution effect must be larger in magnitude than the income effect so that less is purchased as the price falls.
B.
substitution effect must be smaller in magnitude than the income effect so that less is purchased as the price falls.
C.
income effect is positive, so that more is purchased as income increases.
D.
income effect is negative, so that less is purchased as income increases.
【简答题】A．constructs B．convinces C．conceals D．considers
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