若查表得到DW上、下限d(下标L)和d(下标U),则DW检验的不确定区间为
A.d(下标U)≤DW≤4-d(下标U)
B.4-d(下标U)≤DW≤4-d(下标L)
C.d(下标L)≤DW≤d(下标U)
D.4-d(下标L)≤DW≤4
E.0≤DW≤d(下标L)
正确答案是BC
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