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【单选题】
抽自两个超市的顾客独立随机样本,得到他们对超市服务质量的评分结果如下表: 在α=0.05的显著性水平下,检验假设H 0 :μ 1 -μ 2 ≥0,H 1 :μ 1 -μ 2 <0,得到的结论是( )。A.
拒绝H 0
B.
不拒绝H 0
C.
可以拒绝也可以不拒绝H 0
D.
可能拒绝也可能不拒绝H 0
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