No.PZ2020010302000009 (问答题)来源: 原版书
Consider the following data on a discrete random variable X:
a. Calculate the mean and variance of X.
b. Standardize X and check that the mean and variance of X are 0 and 1 respectively.
c. Calculate the skew and kurtosis of X.
老师您好，我不明白b小问中的标准化是什么意思，是指除以x的均值吗
然后考试的时候像这里一样要求计算skew 和kur嘛
谢谢老师
