给定两个数组用np库求其均值，方差，标准差，协方差import numpy as nparr = [100,98,87,65,82,99,92,99,100]arr1 =[35,34,30,24,28,35,32,34,35]#求均值arr_mean = np.mean(arr)#求方差arr_var = np.var(arr)#求标准差arr_std = np.std(arr,ddof=1)#求