【判断题】【消耗次数：1】
如果权数都相等，则加权算术平均数等于简单算术平均数
①
正确
②
错误
参考答案：
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相关题目
【多选题】
在什么条件下，加权算术平均数等于简单算术平均数( )。
①
各组次数相等
②
各组变量值不等
③
变量数列为组距数列
④
各组次数都为1
⑤
各组次数占总次数的比重相等
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