标题: 求解prep一道数学题~~~ [打印本页] 作者: muxiner1989 时间: 2010-5-11 22:50 标题: 求解prep一道数学题~~~ The arithmetic mean and standard deviation of certain normal distribution are 13.5 and 1.5,respectively.What’s value is exactly standard deviations less than the mean? Correct Answer 10.5 题目啥意思啊？ 请nn们帮忙解答下喔~~~作者: maomaows 时间: 2010-5-11 23:01
是不是题目中漏了2啊？？ 如果是就是13.5-2*1.5作者: muxiner1989 时间: 2010-5-11 23:06
我应该没打错吧。 题目是啥意思啊？都没看懂呢作者: 宝佳熊 时间: 2010-5-12 08:33
The arithmetic mean and standard deviation of certain normal distribution are 13.5 and 1.5,respectively.What’s value is exactly standard deviations less than the mean? Correct Answer 10.5 题目啥意思啊？ 请nn们帮忙解答下喔~~~