随机产生625个样本，没个样本包含（1，2）之间的25600个随机数，并且使其随机分布！然后计算每个样本的均值，然后再计算总体样本均值，方差，标准差！并计算区间概率！-Randomly generate 625 samples, no samples contains 25 600 (1,2) between the random number, and to a random distribution. Then calculate the mean of each sample, and t