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?

问题描述:

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?

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?