在假设检验中,当样本容量不变时,减少α会引起β增大,减少β会引起α的增大。
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在假设检验中,兼顾α和β很困难,首先考虑的是控制α。
A. 对
B. 错
列联表内每个格子的期望频数等于每行或每列的总和。
A. 对
B. 错
There ________ a dolphin show in the zoo tomorrow evening.
A. is going to have
B. is going to be
C. will have
D. will be
There ________ New Year parties this afternoon.
A. are going to have
B. are going to be
C. is going to have
D. is going to be