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题目内容双击单词支持查询和收藏哦～
In a survey of 5,500 respondents over how many books they would read per year on
average, the result is normally distributed, with a mean of 19 and a standard deviation of
2. What is the average number of books read by the 880 respondents whose number of
books read per year is the greatest?
E显示答案
以上解析由 考满分老师提供。
