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【单选题】
为了调查某小区居民的用水情况,随机抽查了若干户家庭的月用水量,结果如下表: 则关于这若干户家庭的月用水量,下列说法错误的是( )A.
众数是4
B.
平均数是4.6
C.
调查了10户家庭的月用水量
D.
中位数是4.5
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