【单选题】下列由中心极限定理得到的有关结论中,正确的是 ( )
A.
只有当总体服从正态分布时,样本均值才会趋于正态分布
B.
不论总体服从何种分布,只要样本容量 n 充分大,样本均值趋于正态分布
C.
无论样本容量 n 如何,二项分布概率都可以用正态分布近似计算
D.
只要样本容量 n 充分大,随机事件出现的频率等于其概率
【简答题】() 是指个体心理发展是一个开放的、不断积累的过程。
【单选题】Nancy isn’t here. It’s my fault. I forgot all about ____ her.
【单选题】Nancy isn't here. It's my fault, I forgot all about ___ her.
【单选题】Nancy isn't here. It's my mistake. I forgot ______ her.
【简答题】A streamlined contour offers _____________ whena product moves through air or water.A. minimum resistance B. maximum resistance C. maximum efficiency
【简答题】是指个体心理发展是一个开放的、不断积累的过程。 指每一个儿童的心理都有自己的发展速率、特色和风格等,从而构成个体间心理发展的不同。
【单选题】A streamlined contour offers _____________ when a product moves through air or water.
【简答题】下列关于事件的结论中,正确的是( )A. B. C. D.
【简答题】Experience the Colorado River the Hualapai Way! River Runners Offers the ONLY One Day White-water Trip ANYWHERE at the GRAND CANYON! Since 1973, Hualapai River Runners has been conducting white-wa...