What does "a bag weighing within 5% of the mean" mean in the paragraph as below?

What does "a bag weighing within 5% of the mean" mean in the paragraph as below?

题目
What does "a bag weighing within 5% of the mean" mean in the paragraph as below?
The weight of a bags of flour has a mean of 5 pounds with a standard deviation of 0.16 of a pound.Given the weight is normal distributed,what is the probability of a bag weighing within 5% of the mean?
答案
一包面粉的平均重量是5pound(偏差0.16/pound),这里考虑重量是正态分布,一包面粉重量在平均值的5%之内的概率是多少?
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
奥巴马演讲不用看稿子.为什么中国领导演讲要看?
想找英语初三上学期的首字母填空练习……
英语翻译
最新试题
热门考点

超级试练试题库

© 2017-2019 超级试练试题库,All Rights Reserved.