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如果所有变量值的频数都减少为原来的1/5,而变量值仍然不变,那么算术平均数( )。
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如果所有变量值的频数都减少为原来的1/5,而变量值仍然不变,那么算术平均数( )。
A、不变
B、扩大到5倍
C、减少为原来的1/5
D、不能预测其变化
时间:2021-09-01 17:00
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