通常情况下 当零假设(Ho)为# [mu _{1}]#=# [mu _{2}]# =[mu _{3

通常情况下，当零假设(Ho)为# [mu _{1}]#=# [mu _{2}]# =[mu _{3}]#时．备择假设 为（　　）

A.# [mu _{1}]# ≠# [mu _{2}]#≠[mu _{3}]#

B.# [mu _{1}]# ≠# [mu _{2}]#且# [mu _{2}]#≠

C.# [mu _{1}]# ≠# [mu _{2}]#且# [mu _{2}]#≠且# [mu _{1}]# ≠

D.# [mu _{1}]# ≠# [mu _{2}]#且# [mu _{2}]#≠或# [mu _{1}]# ≠

E.# [mu _{1}]# ≠# [mu _{2}]#或# [mu _{2}]#≠或# [mu _{1}]# ≠