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各观察值均加(或减)同一不为0的数后()
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各观察值均加(或减)同一不为0的数后()
A、均数不变,标准差改变
B、均数改变,标准差不变
C、两者均不
D、两者均改变
时间:2021-09-01 20:02
关键词:
联大
信阳师范学院
体育统计学
答案解析
B
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