该程序可思路：先将两个序列相减获得差值序列，求差值序列自相关系数，估计差值序列 的方差（受自相关性的影响），最后求得 z 统计量做单边或双边检验(The program can be thought of: first subtract the two sequences to obtain the difference sequence, seek the autocorrelation coefficient of the sequence, estimate the variance o