random variable X is normally distributed,with a mean of 25 and a standard deviation of 4.Which of the following is cloest to the inter-quartile range for this distribution?A 25-22.3=2.7 B 27.7-22.3=5.4 C 27.7/22.3=1.24 D 2(4)=8 E 37-13=24

random variable X is normally distributed,with a mean of 25 and a standard deviation of 4.Which of the following is cloest to the inter-quartile range for this distribution?A 25-22.3=2.7 B 27.7-22.3=5.4 C 27.7/22.3=1.24 D 2(4)=8 E 37-13=24
random variable X is normally distributed,with a mean of 25 and a standard deviation of 4.
Which of the following is cloest to the inter-quartile range for this distribution?
A 25-22.3=2.7 B 27.7-22.3=5.4 C 27.7/22.3=1.24 D 2(4)=8 E 37-13=24

random variable X is normally distributed,with a mean of 25 and a standard deviation of 4.Which of the following is cloest to the inter-quartile range for this distribution?A 25-22.3=2.7 B 27.7-22.3=5.4 C 27.7/22.3=1.24 D 2(4)=8 E 37-13=24
随机变量x是通常分布的,其平均数为25,标准差是4,下面哪一个最接近这个分布的四分位数区间?
mean是平均数,是一组数据的总数量除以这组数据的总份数所得的商,standard deviation是标准差,是各个数据与平均数之差的平方的平均数的算术平方根.inter-quartile range 是四分位差,它是上四分位数（QL）与下四分位数（QU）之差.这道题目应该是选择A,希望我能帮助你解疑释惑.

题目是：随机变量x是通常分布的，其平均数为25，标准差是4
问下面哪一个最接近这个分布的四分位数区间？
然后步骤是：数学我不会做，自己看课本...

A:25-22.3=2.7
Mean(+/-) 1 stdev=25(+/-)4=21~29