【单选题】根据中心极限定理可知,当样本容量充分时,样本均值的抽样分布服从正态分布,其分布的均值为( ) 。
【单选题】Many companies in Guangdong are facing a serious labor _____ following the Rabbit Year's Spring Festival. [ ]
【单选题】根据中心极限定理可知,当样本容量充分大时,样本均值的抽样分布服从正态分布,其分布的均值是
【单选题】Facing the global financial crisis, the Chinese government has taken many measures ________ people's life to deal with it.