数学题目翻译:what is the probability ……

问题描述:

数学题目翻译:what is the probability ……
数学题目翻译:what is the probability that the absolute value of the difference between the mean of the distribution, which is 4, and a randomly chosen value of X will be greater than 3/2?
另外,特别请问“the mean of the distribution”是什么意思呢?

平均值